2015 Colorado field crop insect management research and demonstration trials

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Tec hni c al Report

TR16-13

Ag

ricultural

Experiment Station

College of Agricultural Sciences Department of Bioagricultural Sciences and Pest

Management

2015 Colorado Field Crop

Insect Management Research

and Demonstration Trials

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2015 Colorado Field Crop

Insect Management Research

and Demonstration Trials

1

Frank B. Peairs2 Jeff Rudolph2

Terri L. Randolph2 Darren Cockrell2

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Mention of a trademark or proprietary product does not constitute endorsement by the Colorado Agricultural Experiment Station.

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TABLE OF CONTENTS

CONTROL OF ALFALFA INSECTS IN ALFALFA WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS,

CO, 2015. . . 2

CONTROL OF BIOTYPE 2 RUSSIAN WHEAT APHID IN WINTER WHEAT WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015.. . . 7

CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID WITH SEED TREATMENTS IN SPRING WHEAT, ARDEC, FORT COLLINS, CO, 2015.. . . 9

CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID IN SPRING MALT BARLEY WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015. . . 11

CONTROL OF SPIDER MITES IN CORN WITH HAND-APPLIED INSECTICIDES AND MITICIDES, ARDEC, FORT COLLINS, CO, 2015. . . 13

2015 PEST SURVEY RESULTS. . . 15

INSECTICIDE PERFORMANCE SUMMARIES.. . . 20

ACKNOWLEDGMENTS. . . 24

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CONTROL OF ALFALFA INSECTS IN ALFALFA WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015

Frank Peairs, Terri Randolph, Jeff Rudolph, Darren Cockrell, Matt Miller, Chrissy Ward, Claire Tovrea, Mary Siebenmorgen, Shannon Warren, Department of Bioagricultural Sciences and Pest Management CONTROL OF ALFALFA INSECTS IN ALFALFA WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015: Early treatments were applied on 16 March 2015 with a ‘rickshaw-type’ CO2

powered sprayer calibrated to apply 20 gal/acre at 3 mph and 30 psi through six XR8002VS nozzles mounted on a 10.0 ft boom. Early treatments were made approximately when army cutworm treatments are applied in the region. This was done to determine the effect of army cutworm

treatment in alfalfa on subsequent alfalfa weevil larval densities. All other treatments were applied in the same manner on 13 May 2015. Conditions for the early treatments were 50 - 60EF with no wind and hazy skies, and 60EF, calm, and hazy skies during the later treatments. No precipitation was recorded during the 24 h period following either treatment date. Plots were 10.0 ft by 25.0 ft and arranged in six replicates of a randomized complete block design. The untreated control and Warrior II, 1.92 fl. oz./acre, plots were replicated 12 times for a more accurate comparison of treatment effects on yield (insect counts from six reps of each treatment were included in the analyses described below). The crop was 6 inches in height at the time of the early treatments and 12 inches at the time of the later treatments.

Treatments were evaluated by taking ten 180N sweeps per plot with a standard 15 inch diameter insect net 14, 32 and 40 days after the later treatments (DAT). The extended sampling period was due to prolonged rainy conditions. Alfalfa weevil larvae, alfalfa weevil adults and pea aphids were counted. A pretreatment sample was taken on 20 May 2015 by taking 100, 180N sweeps across the experimental area. A total of 209 alfalfa weevil larvae, 11 alfalfa weevil adults, and 110 pea aphids was collected in this sample. Counts were transformed by the square root + 0.5 method to correct for nonadditivity. Transformed counts were subjected to analysis of variance and mean separation by Tukey’s HSD procedure (á=0.05). Original means are presented in Tables 1 - 3. Yields were measured on 23 June 2015 by hand harvesting a 0.5 m2 area per plot. Samples were weighed wet and dry and converted to lbs of dry hay per acre prior to comparing yields of treated plots to those of untreated plots using analysis of variance.

Alfalfa weevil larval densities were lower than those observed in 2014, averaging 64.4 and 13.4 larvae per sweep 14 DAT in 2014 and 2015, respectively. A freeze event occurred on 11 May, which could partially explain the difference. Pea aphid densities were higher than those observed in 2014, averaging 0.2 and 10.2 aphids per sweep in 2014 and 2015, respectively. All treatments had fewer alfalfa weevil larvae per sweep than the untreated control 14 DAT (Table 1). All treatments except Mustang Max 0.8EC, 4 oz + Steward, 4 oz; Mustang Max 0.8EC, 4 oz; Baythroid XL, 2.8 oz early, Steward EC, 11.3 oz; and Mustang Max 0.8EC, 4 oz early, had fewer pea aphids per sweep than the untreated control 14 DAT (Table 2). Warrior II, 1.92 oz, two applications; Cobalt Advanced, 19 oz, two applications; Steward EC,

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Field History

Pests: Alfalfa weevil, Hypera postica (Gyllenhal)

Pea aphid, Acyrthosiphon pisum (Harris)

Cultivar: Dekalb DKA41-18RR

Plant Stand: Good

Irrigation: Furrow

Crop History: Alfalfa since August 2011

Herbicide: None

Insecticide: None prior to experiment

Fertilization: None

Soil Type: Sandy clay loam

Location: ARDEC, 4616 North Frontage Road, Fort Collins, CO, 80524 (SW corner of Bee

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Table 1. Control of alfalfa weevil larvae with hand-applied insecticides, ARDEC, Fort Collins, CO. 2015. ALFALFA WEEVIL LARVAE PER 180E SWEEP ± SE1

PRODUCT, FL OZ/ACRE 14 DAT 32 DAT 40 DAT

Mustang Max 0.8EC, 4 oz + Steward, 4 oz

0.2 ± 0.1 B 0.8 ± 0.2 D 0.0 ± 0.0

Endigo ZCX 2.71 ZC, 4 oz 0.4 ± 0.0 B 0.7 ± 0.1 D 0.0 ± 0.0

Warrior II, 1.92 oz 0.5 ± 0.1 B 1.2 ± 0.4 CD 0.1 ± 0.0

Warrior II, 1.92 oz** 0.6 ± 0.2 B 0.6 ± 0.1 D 0.1 ± 0.1

Cobalt Advanced, 24 oz 0.7 ± 0.6 B 1.0 ± 0.1 CD 0.0 ± 0.0

Cobalt Advanced, 19 oz** 1.0 ± 0.6 B 1.1 ± 0.2 CD 0.1 ± 0.0

Steward EC, 11.3 oz 1.2 ± 0.4 B 2.4 ± 0.3 ABC 0.1 ± 0.0

Lorsban Advanced 32 oz 1.3 ± 0.4 B 1.4 ± 0.2 CD 0.0 ± 0.0

Stallion 3EC, 11.75 oz 1.3 ± 0.6 B 1.3 ± 0.3 CD 0.1 ± 0.0

Warrior II, 1.92 oz* 1.3 ± 0.3 B 1.5 ± 0.2 CD 0.1 ± 0.1

Baythroid XL, 2.8 oz 1.4 ± 0.3 B 1.3 ± 0.1 CD 0.1 ± 0.0

Stallion 3EC, 11.75 oz* + Mustang Max 0.8EC 4 oz

1.5 ± 0.2 B 1.1 ± 0.3 CD 0.0 ± 0.0

Baythroid XL, 2.8 oz** 1.7 ± 0.3 B 1.0 ± 0.3 CD 0.2 ± 0.1

Mustang Max 0.8EC, 4 oz**

2.1 ± 0.4 B 1.7 ± 0.4 BCD 0.0 ± 0.0

Cobalt Advanced, 19 oz* 2.4 ± 0.6 B 3.1 ± 0.5 AB 0.1 ± 0.0

Besiege 1.25 ZC, 9 oz 2.4 ± 1.5 B 1.4 ± 0.4 CD 0.1 ± 0.0

Mustang Max 0.8EC, 4 oz* 2.4 ± 0.6 B 2.2 ± 0.5 BCD 0.0 ± 0.0

Baythroid XL, 2.8 oz* 3.0 ± 0.4 B 1.9 ± 0.4 BCD 0.1 ± 0.0

Mustang Max 0.8EC, 4 oz 4.8 ± 2.7 B 1.4 ± 0.2 CD 0.1 ± 0.0

Untreated control 13.4 ± 2.5 A 4.0 ± 0.8 A 0.1 ± 0.0

F value 8.11 6.83 1.25

p>F 0.0000 0.0000 0.2366

1

SE, standard error of the mean. Means in the same column followed by the same letter(s) are not statistically different, Tukey’s HSD (%=0.05). *Early treatment date

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Table 2. Control of pea aphids with hand-applied insecticides, ARDEC, Fort Collins, CO. 2015.

PEA APHIDS PER 180E SWEEP ± SE1

Lorsban Advanced 32 oz 0.4 ± 0.1 D 3.7 ± 0.8 B 1.6 ± 0.5 AB

Cobalt Advanced, 19 oz** 0.5 ± 0.3 D 4.1 ± 1.0 AB 0.7 ± 0.3 BC

0.5 ± 0.1 D 3.4 ± 0.7 B 0.7 ± 0.1 BC

Warrior II, 1.92 oz 0.5 ± 0.2 D 4.7 ± 0.8 AB 0.8 ± 0.1 BC

Warrior II, 1.92 oz** 0.5 ± 0.2 D 3.3 ± 1.0 B 0.6 ± 0.1 BC

Cobalt Advanced, 24 oz 0.6 ± 0.5 D 3.3 ± 0.3 B 0.7 ± 0.2 BC

Stallion 3EC, 11.75 oz 1.4 ± 1.0 D 4.7 ± 1.1 AB 1.0 ± 0.5 ABC

Endigo ZCX 2.71 ZC, 4 oz 2.0 ± 1.7 CD 2.9 ± 0.3 B 0.8 ± 0.3 BC

Baythroid XL, 2.8 oz 2.0 ± 0.3 BCD 3.2 ± 0.8 B 0.7 ± 0.2 BC

Baythroid XL, 2.8 oz** 2.2 ± 1.0 BCD 4.1 ± 1.2 AB 0.7 ± 0.2 BC

Besiege 1.25 ZC, 9 oz 2.3 ± 0.8 BCD 3.7 ± 0.9 B 1.1 ± 0.4 ABC

Mustang Max 0.8EC, 4 oz** 2.3 ± 0.4 BCD 4.5 ± 0.9 AB 0.6 ± 0.2 C

Cobalt Advanced, 19 oz* 2.7 ± 0.6 BCD 5.4 ± 1.5 AB 1.1 ± 0.2 ABC

Warrior II, 1.92 oz* 2.7 ± 0.5 BCD 3.3 ± 0.6 B 0.8 ± 0.3 BC

3.6 ± 0.7 ABCD 4.8 ± 1.2 AB 1.2 ± 0.3 ABC

Mustang Max 0.8EC, 4 oz 4.7 ± 2.5 ABCD 4.0 ± 0.8 AB 1.0 ± 0.4 ABC

Baythroid XL, 2.8 oz* 6.5 ± 0.8 ABC 3.7 ± 0.6 B 1.1 ± 0.4 ABC

Steward EC, 11.3 oz 6.7 ± 2.9 AB 7.4 ± 1.2 A 2.0 ± 0.7 A

Mustang Max 0.8EC, 4 oz* 8.8 ± 1.8 A 3.3 ± 0.6 B 1.2 ± 0.5 ABC

Untreated control 10.1 ± 2.0 A 5.5 ± 1.2 AB 1.1 ± 0.3 ABC

F value 8.95 2.68 3.06

p>F 0.0000 0.0009 0.0002

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Table 3. Control of alfalfa weevil adults with hand-applied insecticides, ARDEC, Fort Collins, CO. 2015.

ALFALFA WEEVIL ADULTS PER 180E SWEEP ± SE1

Warrior II, 1.92 oz** 0.1 ± 0.0 A 0.2 ± 0.1 AB 0.3 ± 0.1 C

Cobalt Advanced, 19 oz** 0.1 ± 0.0 A 0.1 ± 0.0 B 0.5 ± 0.1 BC

Steward EC, 11.3 oz 0.1 ± 0.1 A 0.5 ± 0.1 AB 0.5 ± 0.2 BC

Endigo ZCX 2.71 ZC, 4 oz 0.1 ± 0.0 A 0.3 ± 0.1 AB 0.6 ± 0.2 BC

0.1 ± 0.0 A 0.3 ± 0.1 AB 0.7 ± 0.3 BC

Besiege 1.25 ZC, 9 oz 0.1 ± 0.0 A 0.2 ± 0.0 AB 0.8 ± 0.3 ABC

Cobalt Advanced, 19 oz* 0.2 ± 0.1 A 0.2 ± 0.0 AB 0.8 ± 0.3 ABC

Warrior II, 1.92 oz 0.0 ± 0.0 A 0.3 ± 0.1 AB 0.8 ± 0.1 ABC

Cobalt Advanced, 24 oz 0.0 ± 0.0 A 0.2 ± 0.1 AB 0.8 ± 0.2 ABC

Lorsban Advanced 32 oz 0.1 ± 0.0 A 0.2 ± 0.0 AB 0.8 ± 0.3 ABC

Stallion 3EC, 11.75 oz 0.1 ± 0.0 A 0.4 ± 0.1 AB 0.9 ± 0.4 ABC

Warrior II, 1.92 oz* 0.1 ± 0.1 A 0.3 ± 0.1 AB 0.9 ± 0.1 ABC

0.1 ± 0.0 A 0.3 ± 0.1 AB 0.9 ± 0.2 ABC

Baythroid XL, 2.8 oz** 0.1 ± 0.0 A 0.2 ± 0.0 AB 1.2 ± 0.4 ABC

Mustang Max 0.8EC, 4 oz* 0.1 ± 0.0 A 0.4 ± 0.1 AB 1.3 ± 0.3 ABC

Baythroid XL, 2.8 oz 0.0 ± 0.0 A 0.4 ± 0.1 AB 1.4 ± 0.4 ABC

Baythroid XL, 2.8 oz* 0.2 ± 0.1 A 0.4 ± 0.1 AB 1.6 ± 0.3 ABC

Mustang Max 0.8EC, 4 oz 0.1 ± 0.0 A 0.7 ± 0.2 A 1.9 ± 0.8 AB

Mustang Max 0.8EC, 4 oz* 0.2 ± 0.1 A 0.4 ± 0.1 AB 2.0 ± 0.5 AB

Untreated control 0.1 ± 0.0 A 0.6 ± 0.2 AB 2.3 ± 0.6 A

F value 2.09 2.08 3.63

p>F 0.0105 0.0111 0.0000

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CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID IN WINTER WHEAT WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015

Jeff Rudolph, Terri Randolph, Frank Peairs, Darren Cockrell, Matt Miller, Chrissy Ward, Claire Tovrea, Mary Siebenmorgen, Shannon Warren, Department of Bioagricultural Sciences and Pest Management

CONTROL OF RUSSIAN WHEAT APHID IN WINTER WHEAT WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015: Treatments were applied on 22 April 2015 with a 'rickshaw-type' CO2 powered

sprayer calibrated to apply 20 gal/acre at 3 mph and 32 psi through three 8002 (LF2) nozzles mounted on a 5.0 ft boom. Conditions at the time of treatment were clear and 55EF with 0-3 mph winds from the west. Plots were 6 rows (5.0 ft) by 25.0 ft and were arranged in six replicates of a randomized complete block design. Crop stage at application was jointing (Zadoks 32). The crop had been infested with greenhouse-reared Biotype RWA2 aphids on 9 and 23 October 2014.

Treatments were evaluated for Russian wheat aphid control by collecting 20 symptomatic tillers along the middle four rows of each plot 8, 22 and 41 days after treatment (DAT). The intervals between samples were greater than customary because of unfavorable weather conditions. Tiller samples were placed in Berlese funnels for 24 hours to extract aphids into alcohol for counting. Symptomatic tiller samples taken the day before treatment averaged 18.6 Russian wheat aphids per tiller.

Aphid and counts were transformed by the log + 1 method to correct for nonadditivity, and transformed counts were used for analysis of variance and mean separation by Tukey’s HSD test (á=0.05). Original means are presented in Table 4. Total aphid days per tiller were calculated according the method of Ruppel (Journal of Economic Entomology 76: 375-7, 1983), transformed by the log + 1 method, and analyzed in the same manner, with original means presented in Table 1.

Aphid abundance was much higher than in 2014, with approximately 18.4 aphids per tiller in the

untreated control 22 DAT (Table 1) compared to 2.7 aphids per tiller 21 DAT in 2014. Crop condition was very good. The Endigo ZCX 2.71 ZC, 4 fl oz, Lorsban Advanced, 16 fl oz, sulfoxaflor 50 WG, 1.5 oz,

Stallion, 11.75 fl oz, and Warrior II 2.09 CS, 1.92 fl oz, had fewer aphid days than the untreated control. Aphid days were measured over a longer than usual period. The Endigo ZCX 2.71 ZC, 4 fl oz, and the Lorsban Advanced, 16 fl oz, treatments reduced aphids per tiller at three weeks by 90% or more, the level of performance observed by the more effective treatments in past experiments.

Field History

Pest: Russian wheat aphid, Diuraphis noxia (Kurdjumov)

Cultivar: 'Byrd'

Planting Date: 18 September 2014

Irrigation: Pre-plant irrigation with linear move sprinkler Crop History: Fallow in 2014 crop year, no tillage

Herbicide: None

Fertilization: None

Location: ARDEC, 4616 North Frontage Road, Fort Collins, CO 80524, Field 1030 South, N40.654044, W104.997690

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Table 4. Control of Russian wheat aphid in winter wheat with hand-applied insecticides, ARDEC, Fort Collins, CO. 2015.

APHIDS PER TILLER ± SE1 APHID DAYS PER % REDUCTION IN

PRODUCT, FL OZ/ACRE 8 DAT 22 DAT 41 DAT TILLER2_{± SE} _{APHID DAYS}

Endigo ZCX 2.71 ZC, 4 fl oz3 _{0.0 ± 0.0 G} _{0.8 ± 0.8 FG} _{0.1 ± 0.1 D} _{88.4 ± 13.0} _E ₉₄

Lorsban Advanced, 16 fl oz 0.4 ± 0.1 F 0.6 ± 0.3 G 0.2 ± 0.1 CD 89.9 ± 3.9 E 94

Sulfoxaflor 50 WG, 1.5 oz3 1.6 ± 0.6 EF 2.6 ± 0.8 DEF 1.7 ± 1.0 ABCD 149.8 ± 16.1 DE 90

Stallion, 11.75 fl oz 3.0 ± 1.0 DE 2.5 ± 1.0 EF 3.1 ± 1.8 ABCD 178.7 ± 19.1 DE 89

Warrior II 2.09 CS, 1.92 fl oz 4.7 ± 1.2 CDE 3.5 ± 1.3 CDEF 0.7 ± 0.4 BCD 190.0 ± 33.3 DE 88

Cobalt Advanced, 11 fl oz 6.6 ± 1.6 BCDE 3.1 ± 1.2 DEF 1.1 ± 0.7 BCD 207.9 ± 24.2 CDE 87

Mustang Max, 4.0 fl oz 9.6 ± 3.0 BCD 9.2 ± 5.7 BCDE 4.0 ± 1.4 AB 369.4 ± 115.0 BCD 76

Untreated control 11.4 ± 2.4 BCD 18.4 ± 7.2 ABCD 13.2 ± 5.9 A 628.1 ± 189.7 BC 60

Sulfoxaflor 50 WG, 0.75 oz3 21.5 ± 10.0 BC 21.7 ± 9.3 ABC 2.8 ± 0.9 ABCD 694.5 ± 257.6 B 56

Baythroid XL, 2.4 fl oz 24.3 ± 3.2 AB 22.6 ± 5.8 AB 3.7 ± 1.6 ABC 750.7 ± 120.5 AB 52

Dimethoate 267, 16 fl oz 73.3 ± 11.8 A 39.4 ± 6.7 A 4.9 ± 1.9 AB 1576.9 ± 201.9 A —

F value 36.81 17.60 5.77 22.86 —

p>F 0.0000 0.0000 0.0000 0.0000 —

1

SE, standard error of the mean. Means in the same column followed by the same letters(s) are not statistically different, Tukey’s HSD (%=0.05).

2

Total aphid days per tiller calculated by the Ruppel method.

3

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CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID WITH SEED TREATMENTS IN SPRING WHEAT, ARDEC, FORT COLLINS, CO, 2015

Terri Randolph, Jeff Rudolph, Darren Cockrell, Matt Miller, Chrissy Ward, Claire Tovrea, Mary Siebenmorgen, Shannon Warren, and Frank Peairs, Department of Bioagricultural Sciences and Pest Management

CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID WITH SEED TREATMENTS IN SPRING WHEAT, ARDEC, FORT COLLINS, CO, 2015: Treated seeds were planted at 100 lb of seed per acre on 16 March 2015 using a small plot precision cone planter. Spring wheat seed had been treated by Syngenta Seeds, Stanton, MN. Plots were 6 rows (5.0 ft) by 10 ft and were arranged in six replicates of a randomized complete block design. One m sections in each of the four middle rows of each plot were infested with ca. 240 greenhouse-reared Biotype RWA2 Russian wheat aphids per section on 24 April 2015.

Treatments were evaluated for Russian wheat aphid control by collecting 20 tillers at random from one of the middle infested rows on 12 May (Zadoks 30) and 8 June 2014 (Zadoks 50). Tiller samples were placed in Berlese funnels for 24 hours to extract aphids into alcohol for counting. Stand count was determined by counting all plants in two, one m sections from the middle of each plot on 6 April 2015. On 24 July 2015, one m of one of the nonsampled middle rows was harvested. The number of spikes, 100 seed weight and total grain weight were determined. Grain weight was converted to bushels per acre at 15% moisture.

Aphid counts were transformed by the log + 1 method to correct for nonadditivity, and transformed counts were used for analysis of variance and mean separation by Tukey’s HSD test (á=0.05). Original means are presented in Table 5. Plant stand, spikes per row m, 100 seed weight and yield were analyzed in a similar manner. Means are presented in Table 5.

Aphid abundance was high. Treatment 1 had more aphids than any other treatment. Crop condition was good, and no phytotoxicity was observed with any treatment. Aphids reduced both seed weight and yield. Yield and 100 seed weight in Treatment 1 were reduced 66 and 36%, respectively, compared to the average of the other treatments.

Field History

Cultivar: Unknown

Planting Date: 16 March 2015

Irrigation: None

Crop History: Spring wheat with no tillage in 2014

Herbicide: None

Fertilization: None

Location: ARDEC, 4616 North Frontage Road, Fort Collins, CO 80524 (Block 1080 northwest, N 40.65580, W 104.99686)

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Table 5. Russian wheat aphids per tiller in spring wheat with insecticidal seed treatments, ARDEC, 2015. Aphids per tiller

Treatment 57 DAP 84 DAP Plants/row m Spikes/row m 100 seed wt (g) Bushels/acre

Treatment 8 0.0 ± 0.0 B 0.0 ± 0.0 B 58.8 ± 4.5 67.3 ± 5.6 AB 4.0 ± 0.0 A 20.7 ± 1.5 A Treatment 6 0.0 ± 0.0 B 0.1 ± 0.0 B 70.2 ± 6.0 71.3 ± 2.6 A 3.9 ± 0.1 A 20.5 ± 1.8 A Treatment 2 0.0 ± 0.0 B 0.1 ± 0.1 B 60.8 ± 4.2 64.8 ± 7.3 AB 3.9 ± 0.1 A 18.8 ± 2.7 A Treatment 5 0.0 ± 0.0 B 0.1 ± 0.0 B 70.6 ± 6.0 60.5 ± 6.3 AB 4.0 ± 0.1 A 17.5 ± 2.6 A Treatment 4 0.1 ± 0.0 B 0.1 ± 0.1 B 68.4 ± 5.4 62.5 ± 3.3 AB 3.8 ± 0.0 A 17.0 ± 0.2 A Treatment 7 0.0 ± 0.0 B 0.1 ± 0.0 B 67.1 ± 2.5 65.0 ± 6.3 AB 3.9 ± 0.1 A 16.6 ± 2.2 A Treatment 3 0.0 ± 0.0 B 0.1 ± 0.0 B 73.3 ± 3.5 62.5 ± 4.1 AB 3.7 ± 0.1 A 16.2 ± 1.3 A Treatment 1 10.1 ± 1.8 A 23.8 ± 4.8 A 61.3 ± 4.7 42.7 ± 5.9 B 2.5 ± 0.3 B 6.2 ± 2.0 B F value 152.76 78.28 1.31 2.12 17.85 6.42 p>F 0.0000 0.0000 0.2763 0.0674 0.0000 0.0001

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CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID IN SPRING MALT BARLEY WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015

Jeff Rudolph, Terri Randolph, Frank Peairs, Darren Cockrell, Brandyn Davis, Chrissy Ward, Claire Tovrea, Mary Siebenmorgen, Shannon Warren, Department of Bioagricultural Sciences and Pest Management CONTROL OF BIOTYPE RWA2 RUSSIAN WHEAT APHID IN SPRING MALT BARLEY WITH HAND-APPLIED INSECTICIDES, ARDEC, FORT COLLINS, CO, 2015: Treatments were applied on 13 May 2015 with a 'rickshaw-type' CO2 powered sprayer calibrated to apply 20 gal/acre at 3 mph and 32 psi through three

8002 (LF2) nozzles mounted on a 5.0 ft boom. Conditions at the time of treatment were calm, hazy and 50-60EF. Plots were 6 rows (5.0 ft) by 25.0 ft and were arranged in six replicates of a randomized complete block design. Crop stage at application was in the seedling stage (Zadoks 14). The crop had been infested with greenhouse-reared Biotype RWA2 aphids on 10 April 2015.

Treatments were evaluated for Russian wheat aphid control by collecting 20 symptomatic tillers along the middle four rows of each plot 3, 19 and 26 days after treatment (DAT). The intervals between samples were greater than customary because of unfavorable weather conditions. Tiller samples were placed in Berlese funnels for 24 hours to extract aphids into alcohol for counting. Symptomatic tiller samples taken 3 days before treatment averaged 6.8 Russian wheat aphids per tiller.

Aphid and counts were transformed by the log + 1 method to correct for nonadditivity, and transformed counts were used for analysis of variance and mean separation by Tukey’s HSD test (á=0.05). Original means are presented in Table 1. Total aphid days per tiller were calculated according the method of Ruppel (Journal of Economic Entomology 76: 375-7, 1983), transformed by the log + 1 method, and analyzed in the same manner, with original means presented in Table 6.

Aphid abundance was similar to that observed in 2014, with approximately 11.9 aphids per tiller in the untreated control 19 DAT (Table 6) compared to 14.7 aphids per tiller 21 DAT in 2014. Crop condition was very good. All treatments had fewer aphid days than the untreated control. Aphid days were measured over a longer than usual period due to unfavorable weather. The Endigo ZCX 2.71 ZC, 4 fl oz, Cobalt Advanced, 11 fl oz, and the Besiege 1.25 ZC, 9 fl oz, treatments reduced aphid days per tiller at three weeks by 90% or more, the level of performance observed by the more effective treatments in past experiments.

Field History

Cultivar: 'Innovation'

Planting Date: 16 March 2015

Irrigation: None

Crop History: Fallow in 2014, no tillage

Herbicide: None

Insecticide: None prior to experiment Fertilization: None

Location: ARDEC, 4616 North Frontage Road, Fort Collins, CO 80524, center section of Field 1080 North, N40.65583, W104.99647

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Table 6. Control of Russian wheat aphid in spring malt barley with hand-applied insecticides, ARDEC, Fort Collins, CO. 2015.

APHIDS PER TILLER ± SE1 _{APHID DAYS PER} _{% REDUCTION IN}

PRODUCT, FL OZ/ACRE 3 DAT 19 DAT 26 DAT TILLER2 ± SE APHID DAYS

Endigo ZCX 2.71 ZC, 4 fl oz 3 0.1 ± 0.0 C 0.1 ± 0.0 C 0.3 ± 0.1 C 19.8 ± 0.5 C 94 Cobalt Advanced, 11 fl oz 0.0 ± 0.0 C 0.2 ± 0.1 C 0.5 ± 0.1 BC 21.0 ± 0.9 C 94 Besiege 1.25 ZC, 9 fl oz 3 0.6 ± 0.5 C 0.6 ± 0.4 BC 0.6 ± 0.1 BC 31.3 ± 6.1 C 91 Baythroid XL, 2.4 fl oz3 1.8 ± 0.8 BC 0.8 ± 0.2 BC 1.2 ± 0.5 BC 49.8 ± 9.7 BC 86 Sulfoxaflor 50 WG, 1.5 oz3 _{1.1 ± 0.4 BC} _{1.5 ± 0.7 BC} _{2.2 ± 0.7 BC} _53.3 _{± 10.5} _BC ₈₅ Warrior II 2.09 CS, 1.92 fl oz3 1.3 ± 0.8 BC 2.0 ± 1.3 BC 1.0 ± 0.3 BC 57.8 ± 23.7 BC 84 Sulfoxaflor 50 WG, 0.75 oz3 4.1 ± 1.1 B 2.8 ± 1.0 B 2.7 ± 0.8 B 101.7 ± 24.4 B 71 Untreated control 14.7 ± 3.5 A 11.9 ± 2.3 A 12.6 ± 4.6 A 352.3 ± 43.4 A — F value 16.90 14.12 12.01 19.13 — p>F 0.0000 0.0000 0.0000 0.0000 —

1_{SE, standard error of the mean. Means in the same column followed by the same letters(s) are not statistically different, Tukey’s HSD (%=0.05).} 2

Total aphid days per tiller calculated by the Ruppel method.

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CONTROL OF SPIDER MITES IN CORN WITH HAND-APPLIED INSECTICIDES AND MITICIDES, ARDEC, FORT COLLINS, CO, 2015

Darren Cockrell, Jeff Rudolph, Terri Randolph, Chrissy Ward, Claire Tovrea, Mary Siebenmorgen, Shannon Warren and Frank Peairs, Department of Bioagricultural Sciences and Pest Management

CONTROL OF SPIDER MITES IN CORN WITH HAND-APPLIED INSECTICIDES AND MITICIDES, ARDEC, FORT COLLINS, CO, 2015: Early treatments were applied on 28 July 2015 using a two row boom sprayer mounted on a backpack and calibrated to deliver 17.8 gal/acre at 32 psi with five XR8002VS nozzles. All other

treatments were applied in the same manner on 11 August 2015. Conditions were clear, 65-70EF, and calm during the early treatments. Conditions were partly cloudy, 68-70E F with 0-3 mph NW winds at the time of late treatments. Early treatments were applied at tassel emergence and late treatments were applied at brown silk. All treatments, except the untreated control, were applied with Dyne-Amic 0.25% v/v. Plots were 25 ft by two rows (30 inch centers) and were arranged in six replicates of a randomized complete block design. Plots were separated from neighboring plots by a single buffer row. Plots were infested on 11 July 2015 by laying mite infested corn leaves, collected earlier that day in Mesa County, CO, across the plants on which mites were to be counted. On 14 July 2015, the experimental area was treated with permethrin 3.2E, 10 fl oz/acre, to control beneficial insects and promote spider mite abundance. Treatments were evaluated by collecting three leaves (ear leaf, 2nd leaf above the ear, 2nd leaf below the ear) from two plants per plot -1, 10, 17, and 24 days after the later treatments (DAT). Corn leaves were placed in Berlese funnels for 24 hours to extract mites into alcohol for counting. Mite counts were transformed by the square root + 0.5 method to address nonadditivity issues. Total mite days were calculated by the method of Ruppel (Journal of Economic Entomology 76: 375-377). Transformed counts and total mite days were subjected to analysis of variance and mean separation by Tukey's HSD method (%=0.05), with original means presented in Table 7. Reductions in mite days were calculated by Abbott's (1925) formula: (percent reduction = ((untreated-treated)/untreated) X 100) using the average

accumulated mite days of the untreated control.

Mite abundance was similar to that observed in 2014, with total mite days in the untreated control in the two experiments averaging 544 and 483 in 2015 and 2014, respectively. No treatment had fewer mite days than the untreated control. No phytotoxicity was observed.

Field History:

Pest: Banks grass mite, Oligonychus pratensis (Banks)

Cultivar: NK N29T 3000 GT

Planting Date: 1 May 2015 Plant Population: 34,000

Irrigation: Linear move sprinkler

Crop History: Corn in 2014

Herbicide: 10 June 2015, Roundup PowerMax, 32 fl oz/acre + Hel-fire, 6.4 fl oz/acre + Active Plus 38 fl oz/acre; 19 June 2015, Roundup PowerMax, 22 fl oz/acre + sprayable ammonium sulfate, 2.04 lb/acre

Fertilization: 180 lb N, 40 lb P, 12 lb S/acre on 13 April 2015

Soil Type: Clay loam

Location: ARDEC, 4616 North Frontage Road, Fort Collins, CO 80524, Field 1030 East (40.65377, -104.99722)

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Table 7. Control of spider mites in field corn with hand-applied miticides, ARDEC, Fort Collins, CO, 2015. MITES PER LEAF ± SEM1

TOTAL % REDUCTION IN

TREATMENTPRODUCT/ACRE* -1 DAT 10 DAT 17 DAT 24 DAT MITE DAYS ± SE1,2 _{MITE DAYS}

Oberon 4SC, 5 fl oz** 3.9 ± 1.6 3.6 ± 1.2 A 5.0 ± 1.3 B 9.8 ± 2.6 119.9 ± 28.1 B 78

GWN-10194 1E, 12 fl oz** 4.7 ± 1.7 5.1 ± 1.9 A 5.2 ± 1.7 B 5.3 ± 1.6 121.8 ± 30.1 B 78

Onager 1E, 16 fl oz** 2.4 ± 0.8 6.0 ± 1.8 A 8.0 ± 3.9 B 12.2 ± 4.0 161.3 ± 54.8 B 70

GWN-10194 1E, 16 fl oz** 4.1 ± 1.4 6.6 ± 1.4 A 6.1 ± 1.7 B 15.8 ± 6.7 174.3 ± 33.1 B 68

Onager 1E, 12 fl oz** 4.4 ± 1.4 6.9 ± 1.9 A 7.4 ± 2.3 B 12.7 ± 2.3 177.4 ± 44.0 B 67

Oberon, 5 oz + dimethoate 0.5 lb ai** 1.0 ± 0.6 4.3 ± 2.4 A 7.3 ± 1.9 B 29.2 ± 14.4 195.4 ± 82.7 B 64 Brigade 6.4 fl oz + dimethoate, 0.5 lb ai*** 18.0 ± 8.3 6.1 ± 3.3 A 5.3 ± 1.8 B 9.5 ± 3.7 211.7 ± 77.5 B 61 Dimethoate, 0.5 lb ai*** 12.3 ± 3.6 6.7 ± 3.5 A 5.7 ± 1.3 B 15.3 ± 4.6 212.5 ± 60.4 B 61 Onager 1E, 12 fl oz + dimethoate 0.5 lb ai** 4.0 ± 0.4 5.9 ± 1.0 A 7.4 ± 2.7 B 26.4 ± 5.3 214.6 ± 44.5 B 61

Portal XLO, 32 fl oz** 2.7 ± 0.8 6.8 ± 1.5 A 17.1 ± 4.1 B 16.4 ± 5.6 248.9 ± 56.4 B 54

Portal XLO, 32 fl oz*** 8.4 ± 1.4 6.6 ± 1.7 A 16.6 ± 5.9 B 18.5 ± 6.1 278.5 ± 72.6 B 49

GWN-10208 4E, 3 fl oz** 3.7 ± 1.2 13.6 ± 4.5 A 12.3 ± 4.8 B 18.1 ± 7.0 283.6 ± 92.5 B 48

Brigade 2EC, 6.4 fl oz*** 24.8 ± 4.8 9.3 ± 4.6 A 6.4 ± 4.2 B 13.9 ± 3.5 296.7 ± 71.3 B 45

GWN-10208 4E, 4 fl oz** 5.9 ± 2.3 13.1 ± 5.0 A 13.5 ± 4.4 B 20.5 ± 4.1 307.2 ± 83.6 B 44

Oberon 4SC, 6 fl oz** 3.7 ± 1.1 14.8 ± 4.0 A 18.2 ± 3.9 AB 19.2 ± 4.2 339.1 ± 51.5 B 38

Onager 1E, 12 fl oz*** 19.2 ± 7.6 14.1 ± 1.9 A 15.4 ± 4.3 B 33.4 ± 15.9 440.7 ± 129.3 AB 19

Onager 1E, 16 fl oz*** 13.4 ± 3.8 16.3 ± 2.3 A 18.5 ± 3.4 AB 32.1 ± 15.1 447.1 ± 63.0 AB 18

Zeal, 2 oz** 9.1 ± 2.6 14.8 ± 3.2 A 30.3 ± 6.7 AB 35.6 ± 11.0 507.9 ± 73.3 AB 7

Untreated 16.6 ± 6.7 25.1 ± 8.8 A 25.0 ± 8.2 AB 20.7 ± 1.8 544.2 ± 102.4 AB 0

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2015 PEST SURVEY RESULTS Table 8. 2015 pheromone trap catches at ARDEC, Fort Collins, CO.

ARDEC – 1030*

Species Total Caught2 Trapping Period

Army cutworm 162 (198) 8/10 - 10/26

Banded sunflower moth 155 (–) 5/26 – 9/8

Beet armyworm 44 (11) 5/26 - 10/26

European corn borer (IA)1 _{20 (45)} _{5/26 - 10/5}

Fall armyworm 387 (344) 5/15 - 10/26

Pale western cutworm 37 (270) 8/10 - 10/26

Sunflower moth 5 (–) 5/26 – 9/8

Western bean cutworm 0 (4) 5/26 - 9/8

Wheat head armyworm 46 (170) 5/15 - 10/5

Wheat stem sawfly 3 (0) 5/11 - 7/13

* (N40.654201, W104.997667)

1

IA, Iowa strain

2

–, not trapped. Number in () is 2014 total catch for comparison

WHEAT STEM SAWFLY SURVEY 2015

Claire Tovrea, Chrissy Ward, Matt Miller, Terri Randolph, and Frank Peairs, Department of Bioagricultural Sciences and Pest Management.

WHEAT STEM SAWFLY SURVEY 2015: The wheat stem sawfly, Cephus cinctus Norton, is a major pest of wheat and other cereals, but also utilizes a wide range of grass hosts. Its distribution includes the northern Great Plains region, reaching from North Dakota and Montana to southeastern Wyoming and Colorado and the Nebraska panhandle.

Wheat stem sawfly adults emerge in late May to early June, generally around the time winter wheat is in late stem elongation or early boot. Females insert eggs inside the stems of wheat, usually near a node. Larvae hatch within 5-7 days and feed downward through the stem for approximately one month. When the plants begin to mature, the larvae move to the base of the plant, cut a small v-shaped notch around the stem and fill the end of the stem with frass. The larvae overwinter within a thin cocoon that they construct to prevent them from dessication. In early spring, larvae pupate and emerge as adults when conditions are favorable. Wheat stem sawfly has one generation per year.

In 2010, the wheat stem sawfly was found in winter wheat in northeastern Colorado. In 2011, damaging populations were found in winter wheat planted near New Raymer, CO, where 40% lodging from the sawfly was observed. A one-day survey, conducted in 2011 in northeastern Colorado at anthesis revealed that 57% of the fields surveyed were infested with wheat stem sawfly. A more formal survey was initiated in 2012.

Approximately 100 samples are collected annually, with the samples per county based on the number of acres each county had in wheat production in 2010. Samples are taken as near as possible to the sites used in 2012, for comparison purposes. Each site is a minimum of 10 miles from its closest

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neighbor to allow appropriate mapping and to improve the distribution of samples with counties. Each site consisted of a wheat field that shared a field edge with a fallow wheat field. The two fields are directly adjacent and not separated by barriers or roads.

GPS coordinates were recorded at each location using a Garmin model GPSmap76S. A hand drawn map was then made for ease of returning to sites. Data on previous crop, presence of adjacent alternative host grasses, tillage type, stubble/residue percent cover, irrigation, county and wheat growth stage were recorded.

Wheat stem sawfly adult and larval presence and abundance was determined. Adults were collected by 100 180Esweeps with a standard insect sweep net within the wheat crop, along the field edge closest to the adjacent fallow, during the sawfly flight. Contents of the net were then emptied into ziplock plastic bags and transported in coolers. The samples were then stored in the freezer for later sawfly counts and future genetic analyses. After anthesis, each site was revisited to collect tillers for determining percentage of larval infestation. Whole plants were dug up along the wheat/fallow border and were placed into ziplock bags and transported to the lab in coolers. The plants were kept in a refrigerator and later dissected to determine percentage larval infestation.

Maps of wheat stem sawfly infested and non-infested sites were constructed using ESRI Arcmap 10.0. Different colored circles indicate the level of infestation and white circles indicates no sawfly present. In 2012, a total of 32.6 % of the sites sampled were infested with wheat stem sawfly. Sites with the highest infestation levels were located in Weld and Morgan counties. Mild to moderate infestation levels were found as south as Cheyenne county. In 2013, 38.6% of the sites sampled were infested with wheat stem sawfly, with some heavier infestations found further south than in 2012. In 2014, 50% of the sites sampled were infested and sawfly was found as far south as Baca county. In 2015, 67% of the sites were infested, with most of the newly infested sites located in southeastern counties. The results from this survey indicate that infestation frequency and intensity is increasing throughout eastern Colorado. This survey will be repeated in 2016 to track the wheat stem sawfly spread and severity.

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INSECTICIDE PERFORMANCE SUMMARIES

Insecticide performance in a single experiment can be quite misleading. To aid in the interpretation of the tests included in this report, long term performance summaries are presented below for insecticides that are registered for use in Colorado and that have been tested at least three times. These

summaries are complete through 2015.

Table 16. Performance of planting-time insecticides against western corn rootworm, 1987-2014, in northern Colorado.

INSECTICIDE 0 -3 ROOT RATING1

AGRISURE RW 0.14 (7)

AZTEC 2.1G 0.06 (35)

COUNTER 15G 0.06 (38)

CRUISER, 1.25 mg (AI)/seed 0.06 (10)

FORCE 1.5G (8 OZ) or 3G (4 OZ) 0.06 (32)

FORCE 3G (5 OZ) 0.07 (12) FORCE CS, 0.46 oz 0.09 (3) FORTRESS 5G 0.08 (14) HERCULEX RW or xTRA 0.13 (6) LORSBAN 15G 0.12 (31) PONCHO 600, 1.25 mg (AI)/seed 0.04 (8) SMARTSTAX 0.04 (3) THIMET 20G 0.50 (15) UNTREATED CONTROL 1.10 (40) 1

Rated on the node damage scale of 0-3, where 0 is least damaged, and 3 is 3 root nodes completely damaged. Ratings taken prior to 2006 were based on the Iowa 1-6 scale and approximated to the 0-3 scale. Number in parenthesis is number of times the product was tested in average. Planting time treatments averaged over application methods.

Table 17. Performance of cultivation insecticide treatments against western corn rootworm, 1987-2005, in northern Colorado.

INSECTICIDE IOWA 1-6 ROOT RATING1

COUNTER 15G 2.8 (21)

FORCE 3G 3.3 (8)

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Table 8. Insecticide performance against first generation European corn borer, 1982-2002, in northeast Colorado.

MATERIAL LB/ACRE METHOD1

% CONTROL2

DIPEL ES 1 QT + OIL I 91 (4)

LORSBAN 15G 1.00 (AI) A 77 (5)

LORSBAN 15G 1.00 (AI) C 80 (6)

LORSBAN 4E 1.0 (AI) I 87 (9)

POUNCE 3.2E 0.15 (AI) I 88 (11)

POUNCE 1.5G 0.15 (AI) C 87 (4) POUNCE 1.5G 0.15 (AI) A 73 (7) THIMET 20G 1.00 (AI) C 77 (4) THIMET 20G 1.00 (AI) A 73 (3) WARRIOR 1E 0.03 (AI I 85 (4) 1

A = Aerial, C = Cultivator, I = Center Pivot Injection. CSU does not recommend the use of aerially-applied liquids for control of first generation European corn borer.

2

Numbers in () indicate that percent control is the average of that many trials.

Table 9. Insecticide performance against western bean cutworm, 1982-2002, in northeast Colorado.

MATERIAL LB (AI)/ACRE METHOD1 % CONTROL2

CAPTURE 2E 0.08 A 98 (5) CAPTURE 2E 0.08 I 98 (5) LORSBAN 4E 0.75 A 88 (4) LORSBAN 4E 0.75 I 94 (4) POUNCE 3.2E 0.05 A 97 (7) POUNCE 3.2E 0.05 I 99 (5) WARRIOR 1E (T) 0.02 I 96 (2) 1

A = Aerial, I = Center Pivot Injection

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Table 10. Insecticide performance against second generation European corn borer, 1982-2002, in northeast Colorado.

MATERIAL LB (AI)/ACRE METHOD1 % CONTROL2

DIPEL ES 1 QT PRODUCT I 56 (16) CAPTURE 2E 0.08 A 85 (8) CAPTURE 2E 0.08 I 86 (14) LORSBAN 4E 1.00 + OIL I 72 (14) POUNCE 3.2E 0.15 I 74 (11) WARRIOR 1E 0.03 A 81 (4) WARRIOR 1E 0.03 I 78 (4) 1

A = Aerial, I = Center Pivot Injection

2

Numbers in () indicate how many trials are averaged.

Table 11. Performance of hand-applied insecticides against alfalfa weevil larvae, 1984-2015, in northern Colorado.

PRODUCT LB (AI)/ACRE % CONTROL AT 2 WK1

BAYTHROID XL 0.022 93 (20)

BAYTHROID XL 0.022 (early)3 _{92 (12)}

COBALT OR COBALT ADVANCED 19 fl oz 90 (7)

LORSBAN 4E 0.75 93 (23)

LORSBAN 4E 1.00 90 (12)

LORSBAN 4E 0.50 83 (10)

MUSTANG MAX 0.025 92 (10)

MUSTANG MAX 0.025 (early)3 89 (12)

PERMETHRIN 2 0.10 67 (7) PERMETHRIN 2 _0.20 _{80 (4)} STALLION 11.75 FL OZ 96 (4) STEWARD EC 0.065 80 (7) STEWARD EC 0.110 85 (10) WARRIOR 1E or T or II 0.02 92 (18) WARRIOR II 0.03 (early)3 92 (6)

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Table 12. Control of Russian wheat aphid with hand-applied insecticides in winter wheat, 1986-20151_.

PRODUCT LB TESTS WITH CONTROL > 90% TOTAL TESTS % TESTS

LORSBAN 4E 0.50 30 52 58 COBALT ADVANCED 11 FL OZ 3 7 43 BAYTHROID XL 0.019 0 9 0 DIMETHOATE2 0.375 9 44 20 ENDIGO 2.71 ZCX 4 FL OZ 3 6 50 MUSTANG MAX 0.025 2 13 12 LORSBAN 4E 0.25 10 27 37 LORSBAN 4E 0.375 5 6 83 WARRIOR2 0.03 4 21 19 1

Includes data from several states; 2

several formulations.

Table 13. Control of spider mites in artificially-infested corn, ARDEC, 1993-2015.

PRODUCT LB (AI)/ACRE % REDUCTION IN TOTAL MITE DAYS1

CAPTURE 2E 0.08 47 (21) CAPTURE 2E + DIMETHOATE 4E 0.08 + 0.50 66 (23) COMITE II 1.64 17 (17) COMITE II 2.53 37 (9) COMITE II + DIMETHOATE 4E 1.64 + 0.50 55 (13) DIMETHOATE 4E 0.50 45 (21) OBERON 4SC 0.135 50 (8) OBERON 4SC 0.156 60 (7) OBERON 4SC 0.188 52 (6) ONAGER 1E 0.078 69 (9) ONAGER 1E 0.094 70 (6)

PORTAL XLO (early) 0.10 44 (4)

PORTAL XLO (late) 0.10 46 (3)

ZEAL 0.09 46 (5)

1

Number in () indicates number of tests represented in average. 2009 data not included.

Table 14. Control of sunflower stem weevil, USDA Central Great Plains Research Station, 1998-2002.

PRODUCT LB (AI)/ACRE TIMING % CONTROL1

BAYTHROID 2E 0.02 CULTIVATION 57 (3)

BAYTHROID 2E 0.03 CULTIVATION 52 (3)

WARRIOR 1E 0.02 CULTIVATION 63 (3)

WARRIOR 1E 0.03 CULTIVATION 61 (3)

1

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ACKNOWLEDGMENTS 2015 COOPERATORS

PROJECT LOCATION COOPERATORS

Alfalfa insecticides ARDEC, Fort Collins Chris Fryrear, Mark Collins

Barley insecticides ARDEC, Fort Collins Chris Fryrear, Mark Collins

Corn spider mite control ARDEC, Fort Collins Chris Fryrear, Mark Collins, Bob

Hammon Russian wheat aphid

control

ARDEC, Fort Collins Chris Fryrear, Mark Collins

Wheat stem sawfly control New Raymer Jim and Cole Mertens

Pheromone traps ARDEC, Fort Collins Chris Fryrear, Mark Collins

Suction trap ARDEC, Fort Collins Chris Fryrear, Mark Collins

Suction trap Akron (Central Great Plains

Research Station)

Dave Poss, Merle Vigil

Suction trap Lamar Jeremy Stulp

Suction trap Walsh (Plainsman Research

Center)

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PRODUCT INDEX Agrimek 0.70 SC

Manufacturer: Syngenta

EPA Registration Number: 100-1351

Active ingredient(s) (common name): abamectin. . . 14 Agrisure RW

Genetic insertion events: MIR604

Active ingredient(s) (common name): mCry3A.. . . 20 Ambush 2E

Manufacturer: AMVAC

Active ingredient(s) (common name): cypermethrin. . . 22 Aztec 2.1G

Manufacturer: AMVAC

Active ingredient(s) (common name): 2% tebupirimphos, 0.1% cyfluthrin. . . 20 Baythroid XL

Manufacturer: Bayer CropScience EPA Registration Number: 264-840

Active ingredient(s) (common name): cyfluthrin.. . . 2, 4-6, 8, 12, 22, 23 Besiege 1.25 ZC

Active ingredient(s) (common name): lambda-cyhalothrin + chlorantraniliprole. . . 4-6, 11, 12 Brigade 2EC

Manufacturer: FMC

Active ingredient(s) (common name): bifenthrin. . . 14 Capture 2E

Manufacturer: FMC

Active ingredient(s) (common name): bifenthrin. . . 21-23 Cobalt Advanced

Manufacturer: Dow Agrosciences EPA Registration Number: 62719-615

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Comite II

Manufacturer: Chemtura

Active ingredient(s) (common name): propargite. . . 23 Counter 15G

Manufacturer: AMVAC

Active ingredient(s) (common name): terbufos.. . . 20 Cruiser

Active ingredient(s) (common name): thiamethoxam. . . 20 Dimethoate

Manufacturer: generic

EPA Registration Number: various

Active ingredient(s) (common name): dimethoate. . . 8, 14, 23 Dipel ES

Manufacturer: Valent

Active ingredient(s) (common name): Bacillus thuringiensis. . . 21, 22 Endigo ZCX 2.71 ZC

EPA Registration Number: experimental

Active ingredient(s) (common name): lambda cyhalothrin + thiamethoxam. . . 2, 4-8, 11, 12 Force 3G

Active ingredient(s) (common name): tefluthrin. . . 20 Force CS

Active ingredient(s) (common name): tefluthrin. . . 20 GWN-10194

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GWN-10208

Manufacturer: Gowan EPA Registration Number: NA

Active ingredient(s) (common name): experimental.. . . 14 Herculex RW

Manufacturer: Dow Agrosciences Genetic insertion event DAS 59122-7

Active ingredient(s) (common name): Cry34/35Ab1.. . . 20 Lorsban 15G

Active ingredient(s) (common name): chlorpyrifos.. . . 20, 21 Lorsban 4E

Active ingredient(s) (common name): chlorpyrifos.. . . 21-23 Lorsban Advanced

Active ingredient(s) (common name): chlorpyrifos.. . . 4-8 Mustang Max

Manufacturer: FMC

Active ingredient(s) (common name): zeta cypermethrin. . . 2, 4-6, 8, 22, 23 Oberon 4SC

Active ingredient(s) (common name): spiromesifen. . . 14, 23 Onager 1E

Manufacturer: Gowan

Active ingredient(s) (common name): hexythiazox.. . . 14, 23 Poncho 600

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Portal XLO

Manufacturer: Nichino America EPA Registration Number: 71711-40

Active ingredient(s) (common name): fenpyroximate. . . 14, 23 Pounce 1.5G

Manufacturer: FMC

Active ingredient(s) (common name): permethrin.. . . 21 Pounce 3.2E

Manufacturer: FMC

Active ingredient(s) (common name): permethrin.. . . 21, 22 Smartstax

Manufacturer: Dow Agrosciences

Genetic insertion events: MON 89034 x TC1507 x MON 88017 x

DAS-59122-Active ingredient(s) (common name): Cry 1A.l05 + Cry2Ab2 + Cry34/35Ab1 + Cry 1F.. . . 20 Stallion

Manufacturer: FMC

Active ingredient(s) (common name): zeta cypermethrin + chlorpyrifos. . . 4-8, 22 Steward

Manufacturer: DuPont

Active ingredient(s) (common name): indoxacarb. . . 2, 4-6, 22 Sulfoxaflor (Transform WG)

Active ingredient(s) (common name): sulfoxaflor. . . 7, 8, 12 Thimet 20G

Manufacturer: Amvac

Active ingredient(s) (common name): phorate.. . . 20, 21 Warrior II with Zeon Technology (Warrior II 2.08 CS)