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FIELD EFFICACY OF ACELEPRYN, AN EXPERIMENTAL ANTHRANILIC DIAMIDE, PROVAUNT, AND TALSTAR AGAINST FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, GOLF COURSE FAIRWAY, 2012

FIELD EFFICACY OF ACELEPRYN, AN EXPERIMENTAL ANTHRANILIC DIAMIDE, PROVAUNT, AND TALSTAR AGAINST... Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.G18 (G18) BLUEGRASS (ANNUAL): Poa annua L. BENTGRASS (CREEPING): Agrostis palustrus L. FIELD EFFICACY OF ACELEPRYN, AN EXPERIMENTAL ANTHRANILIC DIAMIDE, PROVAUNT, AND TALSTAR AGAINST FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, GOLF COURSE FAIRWAY, 2012 P. J. Vittum Department of Plant, Soil, and Insect Sciences 104 Agricultural Engineering Building 250 Natural Resources Road University of Massachusetts-Amherst Amherst, MA 01003 Tel: 413-545-0268 Fax: 413-545-5858 Email: pvittum@ent.umass.edu L. J. Brocklesby Email: ljbrock@psis.umass.edu Annual bluegrass weevil (ABW): Listronotus maculicollis (Dietz) Several active ingredients (Acelepryn, cyantraniliprole (an experimental anthranilic diamide), Provaunt, and Talstar) were tested in sequential applications for field efficacy against ABW on golf course fairway turf in spring 2012. Each product was applied 2 April (82 DD) or 30 April (172 DD) 2012 (degree days on 50 degree base temperature). All plots were sampled 4 Jun to determine the efficacy of the compounds against larvae of the first generation of the ABW. The test was conducted at Ludlow Country Club, Ludlow MA. The conditions at the time of application were as follows: (2 April): air temp, 52º F; water pH, 5.6; sunny, light NW breeze (<3 mph); Forsythia full bloom; (30 April): air temp, 62° F; soil temp (at 2 inches), 60° F°; sunny, light north breeze; Forsythia full green; thatch ca. 0.5 – 1.0 inch thick. Treatment plots were 5 ft by 5 ft, replicated 4 times, and arranged in a CRB design. All treatments were applied with a watering can (1.5 qt water per plot), with half the material applied in one direction and the remainder applied in a perpendicular direction. Plots were not watered in 2 Apr, but were irrigated with 0.05 inches water within 1 h after application on 30 Apr. Product efficacy was evaluated on 4 Jun by removing eight 1.85-inch diameter cores from near the center of each plot, transporting the cores to our laboratory in Amherst, MA, and using a saline solution to extract all stages except eggs. Each core was recorded separately, and all counts were included in statistical analyses (Fisher Protected LSD; 0.05 significance level; F = 7.61; P < 0.0001). “Larvae” per core actually reflects counts of all larvae and pupae. Adults were not included in the analysis because of their mobility. There were about 85 larvae per ft . in the untreated checks, slightly above the accepted spring action level of 30 to 80 larvae per ft . Some of the combinations reduced larval populations significantly while others did not. Several of the combinations that included Talstar and Acelepryn on the first application reduced populations but a couple did not. We suspect that the very cold temperature (low of 24°) on the morning of the second application may have reduced efficacy of some products. The spring of 2012 was the warmest on record in the Northeast. Protocols for this trial called for applications at 50 to 75 DD and 150 to 175 DD. While our applications fell nearly within these guidelines, early spring temperatures were abnormal. (For example, this site went from 37 DD to 82 DD in 72 hours in early Apr.) Plant phenology often did not align closely with degree days. Efficacy may be better than that shown here when applications are made closer to the plant phenological indicators when there is such a discrepancy between the two approaches. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.G18 Table 1. larvae larvae Per cent Treatment lb AI/A Date per plug s.e. per sq. ft. control Check --- --- 1.66 a 1.537 84.5 --- Talstar 0.1 2 Apr 0.19c 0.471 9.7 89 + Acelepryn 0.0785 2 Apr + Talstar 0.1 30 Apr + Acelepryn 0.0785 30 Apr Talstar 0.1 2 Apr 0.94 abc 0.948 47.8 43 + Acelepryn 0.0785 2 Apr + Provaunt 0.1125 30 Apr + Acelepryn 0.0785 30 Apr Talstar 0.1 2. Apr 0.28bc 0.457 14.2 83 + Acelepryn 0.0785 2 Apr + Talstar 0.1 30 Apr + HGW86 0.0785 30 Apr Talstar 0.1 2 Apr 1.75a 2.243 89.0 0 + Acelepryn 0.0785 2 Apr + Provaunt 0.1125 30 Apr + HGW86 0.0785 30 Apr Talstar 0.1 2 Apr 0.72abc 0.924 36.6 57 + HGW86 0.0785 2 Apr + Talstar 0.1 30 Apr + HGX86 0.0785 30 Apr Talstar 0.1 2 Apr 1.19abc 1.469 60.5 28 + HGW86 0.0785 2 Apr + Provaunt 0.1125 30 Apr + HGW86 0.0785 30 Apr Talstar 0.1 2 Apr 0.06c 0.246 3.0 96 + Acelepryn 0.104 2 Apr + Talstar 0.1 30 Apr + Acelepryn 0.104 30 Apr Talstar 0.1 2 Apr 1.03abc 1.379 52.4 38 + Acelepryn 0.104 2 Apr + Provaunt 0.1125 30 Apr + Acelepryn 0.104 30 Apr Talstar 0.1 2 Apr 0.28bc 0.581 14.2 83 + Acelepryn 0.104 2 Apr + Talstar 0.1 30 Apr + HGW86 0.104 30 Apr Talstar 0.1 2 Apr 1.41ab 2.138 71.7 15 + Acelepryn 0.104 2 Apr + Provaunt 0.1125 30 Apr + HGW85 0.104 30 Apr Talstar 0.1 2 Apr 0.41bc 0.665 20.9 75 + HGW86 0.104 2 Apr + Talstar 0.1 30 Apr + HGW86 0.104 30 Apr Talstar 0.1 2 Apr 0.44bc 0.716 22.4 74 + HGW86 0.104 2 Apr + Provaunt 0.1125 30 Apr + HGW86 0.104 30 Apr Aloft 11.65 fl oz 2 Apr 0.31bc 0.738 15.8 81 + Aloft 11.65 fl oz 30 Apr Numbers followed by the same letter are not significantly different, Fishers Protected LSD, F = 7.61, P < 0.0001. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

FIELD EFFICACY OF ACELEPRYN, AN EXPERIMENTAL ANTHRANILIC DIAMIDE, PROVAUNT, AND TALSTAR AGAINST FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, GOLF COURSE FAIRWAY, 2012

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10.4182/amt.2013.G18
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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.G18 (G18) BLUEGRASS (ANNUAL): Poa annua L. BENTGRASS (CREEPING): Agrostis palustrus L. FIELD EFFICACY OF ACELEPRYN, AN EXPERIMENTAL ANTHRANILIC DIAMIDE, PROVAUNT, AND TALSTAR AGAINST FIRST GENERATION ANNUAL BLUEGRASS WEEVIL, GOLF COURSE FAIRWAY, 2012 P. J. Vittum Department of Plant, Soil, and Insect Sciences 104 Agricultural Engineering Building 250 Natural Resources Road University of Massachusetts-Amherst Amherst, MA 01003 Tel: 413-545-0268 Fax: 413-545-5858 Email: pvittum@ent.umass.edu L. J. Brocklesby Email: ljbrock@psis.umass.edu Annual bluegrass weevil (ABW): Listronotus maculicollis (Dietz) Several active ingredients (Acelepryn, cyantraniliprole (an experimental anthranilic diamide), Provaunt, and Talstar) were tested in sequential applications for field efficacy against ABW on golf course fairway turf in spring 2012. Each product was applied 2 April (82 DD) or 30 April (172 DD) 2012 (degree days on 50 degree base temperature). All plots were sampled 4 Jun to determine the efficacy of the compounds against larvae of the first generation of the ABW. The test was conducted at Ludlow Country Club, Ludlow MA. The conditions at the time of application were as follows: (2 April): air temp, 52º F; water pH, 5.6; sunny, light NW breeze (<3 mph); Forsythia full bloom; (30 April): air temp, 62° F; soil temp (at 2 inches), 60° F°; sunny, light north breeze; Forsythia full green; thatch ca. 0.5 – 1.0 inch thick. Treatment plots were 5 ft by 5 ft, replicated 4 times, and arranged in a CRB design. All treatments were applied with a watering can (1.5 qt water per plot), with half the material applied in one direction and the remainder applied in a perpendicular direction. Plots were not watered in 2 Apr, but were irrigated with 0.05 inches water within 1 h after application on 30 Apr. Product efficacy was evaluated on 4 Jun by removing eight 1.85-inch diameter cores from near the center of each plot, transporting the cores to our laboratory in Amherst, MA, and using a saline solution to extract all stages except eggs. Each core was recorded separately, and all counts were included in statistical analyses (Fisher Protected LSD; 0.05 significance level; F = 7.61; P < 0.0001). “Larvae” per core actually reflects counts of all larvae and pupae. Adults were not included in the analysis because of their mobility. There were about 85 larvae per ft . in the untreated checks, slightly above the accepted spring action level of 30 to 80 larvae per ft . Some of the combinations reduced larval populations significantly while others did not. Several of the combinations that included Talstar and Acelepryn on the first application reduced populations but a couple did not. We suspect that the very cold temperature (low of 24°) on the morning of the second application may have reduced efficacy of some products. The spring of 2012 was the warmest on record in the Northeast. Protocols for this trial called for applications at 50 to 75 DD and 150 to 175 DD. While our applications fell nearly within these guidelines, early spring temperatures were abnormal. (For example, this site went from 37 DD to 82 DD in 72 hours in early Apr.) Plant phenology often did not align closely with degree days. Efficacy may be better than that shown here when applications are made closer to the plant phenological indicators when there is such a discrepancy between the two approaches. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.G18 Table 1. larvae larvae Per cent Treatment lb AI/A Date per plug s.e. per sq. ft. control Check --- --- 1.66 a 1.537 84.5 --- Talstar 0.1 2 Apr 0.19c 0.471 9.7 89 + Acelepryn 0.0785 2 Apr + Talstar 0.1 30 Apr + Acelepryn 0.0785 30 Apr Talstar 0.1 2 Apr 0.94 abc 0.948 47.8 43 + Acelepryn 0.0785 2 Apr + Provaunt 0.1125 30 Apr + Acelepryn 0.0785 30 Apr Talstar 0.1 2. Apr 0.28bc 0.457 14.2 83 + Acelepryn 0.0785 2 Apr + Talstar 0.1 30 Apr + HGW86 0.0785 30 Apr Talstar 0.1 2 Apr 1.75a 2.243 89.0 0 + Acelepryn 0.0785 2 Apr + Provaunt 0.1125 30 Apr + HGW86 0.0785 30 Apr Talstar 0.1 2 Apr 0.72abc 0.924 36.6 57 + HGW86 0.0785 2 Apr + Talstar 0.1 30 Apr + HGX86 0.0785 30 Apr Talstar 0.1 2 Apr 1.19abc 1.469 60.5 28 + HGW86 0.0785 2 Apr + Provaunt 0.1125 30 Apr + HGW86 0.0785 30 Apr Talstar 0.1 2 Apr 0.06c 0.246 3.0 96 + Acelepryn 0.104 2 Apr + Talstar 0.1 30 Apr + Acelepryn 0.104 30 Apr Talstar 0.1 2 Apr 1.03abc 1.379 52.4 38 + Acelepryn 0.104 2 Apr + Provaunt 0.1125 30 Apr + Acelepryn 0.104 30 Apr Talstar 0.1 2 Apr 0.28bc 0.581 14.2 83 + Acelepryn 0.104 2 Apr + Talstar 0.1 30 Apr + HGW86 0.104 30 Apr Talstar 0.1 2 Apr 1.41ab 2.138 71.7 15 + Acelepryn 0.104 2 Apr + Provaunt 0.1125 30 Apr + HGW85 0.104 30 Apr Talstar 0.1 2 Apr 0.41bc 0.665 20.9 75 + HGW86 0.104 2 Apr + Talstar 0.1 30 Apr + HGW86 0.104 30 Apr Talstar 0.1 2 Apr 0.44bc 0.716 22.4 74 + HGW86 0.104 2 Apr + Provaunt 0.1125 30 Apr + HGW86 0.104 30 Apr Aloft 11.65 fl oz 2 Apr 0.31bc 0.738 15.8 81 + Aloft 11.65 fl oz 30 Apr Numbers followed by the same letter are not significantly different, Fishers Protected LSD, F = 7.61, P < 0.0001.

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2013

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