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EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA — EXPERIMENT 1, 2011

EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN... Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E39 (E39) BELL PEPPER: Capsicum annuum ‘Aristotle’ EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA – EXPERIMENT 1, 2011 Thomas P. Kuhar Department of Entomology Virginia Tech 216 Price Hall Blacksburg, VA 24061-0319 Phone: (540)231-6129 E-mail: tkuhar@vt.edu Hélène Doughty E-mail: hdoughty@vt.edu Katherine Kamminga Anna Wallingford Chris Philips John Aigner Brown marmorated stink bug (BMSB): Halyomorpha halys Stål Green peach aphid (GPA): Myzus persicae (Sulzer) The objective of this experiment was to assess the efficacy of foliar insecticides for the control of BMSB in bell peppers. The trial consisted of 13 treatments arranged in a RCB design with four replicates. Peppers were transplanted on 7 Jun at the Virginia Tech Kentland Research Farm near Blacksburg, VA. Plots were 1 row wide and 20 ft (6.1 m) long with no guard rows. Rows were planted on a 6 ft row center (1.8 m) in a 4 tier field design, 6 ft (1.8 m) alleys between tiers. Foliar treatments were applied on 1, 6, 15 and 24 Aug at 34 gpa using a 3-nozzle boom equipped with D3 spray tips and 45 cores, powered by a CO backpack sprayer set at 40 psi. On 9, 19 Aug and 1 Sep, a sample of 20 market-sized fruit were harvested per plot and examined for stink bug damage. In addition, on 1 Sep, the number of sticky peppers due to aphid honeydew was recorded per 20 harvested. On 9 Sep, the number of GPA was recorded per 20 leaves. All data were analyzed using ANOVA. Proportion data were arcsine square root transformed prior to analysis. Means were separated using Fisher’s Protected LSD at the 0.05 level of significance. Based on visual estimates, BMSB accounted for over 90% of stink bug species. Stink bug damage to fruit was relatively high with 40% damaged fruit in the untreated check on 9 Aug. There was no significant treatment effect on fruit damage on 9 Aug or 1 Sep; however, it should be noted that virtually all of the insecticide treatments averaged less than half as much fruit damage as the untreated check. On 19 Aug, Hero at 6.4, 7.1 and 10.3 fl oz, Athena, and Mustang Max + Lannate had significantly fewer stink bug fruit damage as the untreated check. Due to repeated applications of certain insecticides, there were outbreaks of GPA on some plots. Hero at the 6.4 fl oz and 8 fl oz rates had significantly more GPA on leaves than the untreated check or any other insecticide treatment. As a result of the high aphid densities and their secretion of honeydew, pepper fruit were rendered sticky. Hero at the 6.4 and 7.1 fl oz rates yielded significantly more sticky pepper fruit than the untreated control. Plants within plots displayed no phytotoxicity symptoms following insecticide treatments. This research was supported by grants from FMC and Bayer CropScience. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E39 Table 1. % stink bug damage % sticky peppers Mean no. GPA Treatment / from aphid honey dew / 20 leaves formulation Rate / acre 9 Aug 19 Aug 1 Sep (1 Sep) (9 Sep) Untreated Check 40.0 15.0a 32.5 0.0c 2.8c Hero 6.4 fl. oz 17.5 2.5bcd 10.0 41.3a 1014.0ab Hero 7.1 fl. oz 21.3 5.0bcd 11.3 28.8ab 398.5bc Hero 8 fl. oz 17.5 7.5a-d 15.0 17.5abc 1195.0a Hero 10.3 fl. oz 10.0 3.8cd 10.0 0.0c 53.3c Brigadier 8 fl. oz 15.0 7.5abc 3.8 0.0c 0.3c Athena 16 fl. oz 12.5 5.0bcd 17.5 3.8bc 63.3c Mustang Max 4 fl. oz 7.5 8.8ab 7.5 18.8abc 155.0c Mustang Max 4 fl. oz + 21.3 1.3 d 7.5 1.3c 13.0c + Lannate LV 16 fl. oz Beleaf 2.8 oz 23.8 7.5a-d 16.3 0.0c 1.0c F9318 18 fl. oz 16.3 6.3abc 8.8 0.0c 40.0c Baythroid XL 2.8 fl. oz 25.0 6.3a-d 10.0 5.0bc 201.8c Leverage 360 2.8 fl. oz 20.0 8.8ab 15.0 0.0c 0.5c P-Value from ANOVA ns 0.0592 ns 0.0208 0.018 All data were analyzed using ANOVA. Means were separated using Fisher’s LSD at the 0.05 level of significance. Means followed by the same letter within a column are not significantly different (P>0.05). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA — EXPERIMENT 1, 2011

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Oxford University Press
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2155-9856
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10.4182/amt.2013.E39
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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E39 (E39) BELL PEPPER: Capsicum annuum ‘Aristotle’ EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA – EXPERIMENT 1, 2011 Thomas P. Kuhar Department of Entomology Virginia Tech 216 Price Hall Blacksburg, VA 24061-0319 Phone: (540)231-6129 E-mail: tkuhar@vt.edu Hélène Doughty E-mail: hdoughty@vt.edu Katherine Kamminga Anna Wallingford Chris Philips John Aigner Brown marmorated stink bug (BMSB): Halyomorpha halys Stål Green peach aphid (GPA): Myzus persicae (Sulzer) The objective of this experiment was to assess the efficacy of foliar insecticides for the control of BMSB in bell peppers. The trial consisted of 13 treatments arranged in a RCB design with four replicates. Peppers were transplanted on 7 Jun at the Virginia Tech Kentland Research Farm near Blacksburg, VA. Plots were 1 row wide and 20 ft (6.1 m) long with no guard rows. Rows were planted on a 6 ft row center (1.8 m) in a 4 tier field design, 6 ft (1.8 m) alleys between tiers. Foliar treatments were applied on 1, 6, 15 and 24 Aug at 34 gpa using a 3-nozzle boom equipped with D3 spray tips and 45 cores, powered by a CO backpack sprayer set at 40 psi. On 9, 19 Aug and 1 Sep, a sample of 20 market-sized fruit were harvested per plot and examined for stink bug damage. In addition, on 1 Sep, the number of sticky peppers due to aphid honeydew was recorded per 20 harvested. On 9 Sep, the number of GPA was recorded per 20 leaves. All data were analyzed using ANOVA. Proportion data were arcsine square root transformed prior to analysis. Means were separated using Fisher’s Protected LSD at the 0.05 level of significance. Based on visual estimates, BMSB accounted for over 90% of stink bug species. Stink bug damage to fruit was relatively high with 40% damaged fruit in the untreated check on 9 Aug. There was no significant treatment effect on fruit damage on 9 Aug or 1 Sep; however, it should be noted that virtually all of the insecticide treatments averaged less than half as much fruit damage as the untreated check. On 19 Aug, Hero at 6.4, 7.1 and 10.3 fl oz, Athena, and Mustang Max + Lannate had significantly fewer stink bug fruit damage as the untreated check. Due to repeated applications of certain insecticides, there were outbreaks of GPA on some plots. Hero at the 6.4 fl oz and 8 fl oz rates had significantly more GPA on leaves than the untreated check or any other insecticide treatment. As a result of the high aphid densities and their secretion of honeydew, pepper fruit were rendered sticky. Hero at the 6.4 and 7.1 fl oz rates yielded significantly more sticky pepper fruit than the untreated control. Plants within plots displayed no phytotoxicity symptoms following insecticide treatments. This research was supported by grants from FMC and Bayer CropScience. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E39 Table 1. % stink bug damage % sticky peppers Mean no. GPA Treatment / from aphid honey dew / 20 leaves formulation Rate / acre 9 Aug 19 Aug 1 Sep (1 Sep) (9 Sep) Untreated Check 40.0 15.0a 32.5 0.0c 2.8c Hero 6.4 fl. oz 17.5 2.5bcd 10.0 41.3a 1014.0ab Hero 7.1 fl. oz 21.3 5.0bcd 11.3 28.8ab 398.5bc Hero 8 fl. oz 17.5 7.5a-d 15.0 17.5abc 1195.0a Hero 10.3 fl. oz 10.0 3.8cd 10.0 0.0c 53.3c Brigadier 8 fl. oz 15.0 7.5abc 3.8 0.0c 0.3c Athena 16 fl. oz 12.5 5.0bcd 17.5 3.8bc 63.3c Mustang Max 4 fl. oz 7.5 8.8ab 7.5 18.8abc 155.0c Mustang Max 4 fl. oz + 21.3 1.3 d 7.5 1.3c 13.0c + Lannate LV 16 fl. oz Beleaf 2.8 oz 23.8 7.5a-d 16.3 0.0c 1.0c F9318 18 fl. oz 16.3 6.3abc 8.8 0.0c 40.0c Baythroid XL 2.8 fl. oz 25.0 6.3a-d 10.0 5.0bc 201.8c Leverage 360 2.8 fl. oz 20.0 8.8ab 15.0 0.0c 0.5c P-Value from ANOVA ns 0.0592 ns 0.0208 0.018 All data were analyzed using ANOVA. Means were separated using Fisher’s LSD at the 0.05 level of significance. Means followed by the same letter within a column are not significantly different (P>0.05).

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Published: Jan 1, 2013

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