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EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA — EXPERIMENT 2, 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.E40 (E40) BELL PEPPER: Capsicum annuum ‘Aristotle’ EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA – EXPERIMENT 2, 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 12 treatments arranged in a RCB design with four replicates. Peppers were transplanted on 7 Jun at the Virginia Tech Kentland Research Farm in 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, 20 fruit were harvested per plot and examined for stink bug damage. On 9 Aug, the number of GPA was recorded per 20 leaves. On 1 Sep, the number of sticky peppers due to aphid honeydew was recorded per 20 harvested. 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 in this test. Stink bug pest pressure was relatively high with >20% damaged fruit in the untreated check on all sample dates. There was only a significant treatment effect on the first harvest date (9 Aug), when the untreated check averaged 31.3% damaged fruit which was significantly higher than those treated with Belay, Belay + Danitol, Danitol (both rates), Venom + Exponent, Trebon + Exponent, or Actara 25WG. Use of all pyrethroids in this test (Danitol, Trebon, or Warrior II) resulted in flares of GPA and concomitant sticky pepper fruit from honey dew. No other insecticide treatments flared aphids and the addition of a neonicotinoid with the pyrethroid eliminated aphid flares (Belay + Danitol and Endigo ZC). Plants within plots displayed no phytotoxicity symptoms following insecticide treatments. This research was supported by grants from Valent, IR4 and Syngenta. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E40 Table 1. % stink bug damage % sticky Mean no. GPA Treatment / formulation Rate / acre 9 Aug 19 Aug 1 Sep peppers / 20 leaves Untreated Check 31.3a 26.3 21.3 0.0 6.0 Belay 2.13SC 4 fl oz 10.0bc 3.8 12.5 0.0 0.5 Belay 2.13SC 3 fl oz + 16.3bc 1.3 5.0 0.0 6.3 + Danitol 2.4SC 10.67 fl oz Danitol 2.4SC 10.67 fl oz 10.0bc 10.0 11.3 11.3 120.0 Danitol 2.4SC 16 fl oz 16.3bc 21.3 13.8 15.0 58.5 Venom 70SG 4 oz 17.5abc 13.8 11.3 0.0 2.5 Venom 70SG 4 oz + 12.5bc 13.8 16.3 0.0 0.0 + Exponent (PBO) 5 fl oz Trebon 280 g/l 8 fl oz 21.3ab 11.3 17.5 7.5 100.0 Trebon 280 g/l 8 fl oz + 7.5c 16.3 18.8 3.8 925.8 + Exponent (PBO) 5 fl oz Endigo ZC 5.5 fl oz 17.5abc 8.8 13.8 1.3 1.3 Warrior II 1.92 fl oz 31.3a 11.3 6.3 13.8 498.5 Actara 25WG 5.5 oz 12.5bc 7.5 11.3 0.0 2.5 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 2, 2011

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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E40 (E40) BELL PEPPER: Capsicum annuum ‘Aristotle’ EVALUATION OF INSECTICIDES FOR THE CONTROL OF BROWN MARMORATED STINK BUG IN BELL PEPPERS IN VIRGINIA – EXPERIMENT 2, 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 12 treatments arranged in a RCB design with four replicates. Peppers were transplanted on 7 Jun at the Virginia Tech Kentland Research Farm in 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, 20 fruit were harvested per plot and examined for stink bug damage. On 9 Aug, the number of GPA was recorded per 20 leaves. On 1 Sep, the number of sticky peppers due to aphid honeydew was recorded per 20 harvested. 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 in this test. Stink bug pest pressure was relatively high with >20% damaged fruit in the untreated check on all sample dates. There was only a significant treatment effect on the first harvest date (9 Aug), when the untreated check averaged 31.3% damaged fruit which was significantly higher than those treated with Belay, Belay + Danitol, Danitol (both rates), Venom + Exponent, Trebon + Exponent, or Actara 25WG. Use of all pyrethroids in this test (Danitol, Trebon, or Warrior II) resulted in flares of GPA and concomitant sticky pepper fruit from honey dew. No other insecticide treatments flared aphids and the addition of a neonicotinoid with the pyrethroid eliminated aphid flares (Belay + Danitol and Endigo ZC). Plants within plots displayed no phytotoxicity symptoms following insecticide treatments. This research was supported by grants from Valent, IR4 and Syngenta. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E40 Table 1. % stink bug damage % sticky Mean no. GPA Treatment / formulation Rate / acre 9 Aug 19 Aug 1 Sep peppers / 20 leaves Untreated Check 31.3a 26.3 21.3 0.0 6.0 Belay 2.13SC 4 fl oz 10.0bc 3.8 12.5 0.0 0.5 Belay 2.13SC 3 fl oz + 16.3bc 1.3 5.0 0.0 6.3 + Danitol 2.4SC 10.67 fl oz Danitol 2.4SC 10.67 fl oz 10.0bc 10.0 11.3 11.3 120.0 Danitol 2.4SC 16 fl oz 16.3bc 21.3 13.8 15.0 58.5 Venom 70SG 4 oz 17.5abc 13.8 11.3 0.0 2.5 Venom 70SG 4 oz + 12.5bc 13.8 16.3 0.0 0.0 + Exponent (PBO) 5 fl oz Trebon 280 g/l 8 fl oz 21.3ab 11.3 17.5 7.5 100.0 Trebon 280 g/l 8 fl oz + 7.5c 16.3 18.8 3.8 925.8 + Exponent (PBO) 5 fl oz Endigo ZC 5.5 fl oz 17.5abc 8.8 13.8 1.3 1.3 Warrior II 1.92 fl oz 31.3a 11.3 6.3 13.8 498.5 Actara 25WG 5.5 oz 12.5bc 7.5 11.3 0.0 2.5 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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Arthropod Management TestsOxford University Press

Published: Jan 1, 2013

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