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EFFICACY EVALUATIONS OF NEW INSECTICIDES FOR CODLING MOTH CONTROL ON APPLE, 2004A

EFFICACY EVALUATIONS OF NEW INSECTICIDES FOR CODLING MOTH CONTROL ON APPLE, 2004A (A6) APPLE: Malus domestica Borkhausen, 'Delicious' EFFICACY EVALUATIONS OF NEW INSECTICIDES FOR CODLING MOTH CONTROL ON APPLE, 2004A Jay F. Brunner Tree Fruit Research and Extension Center Washington State University 1100 N. Western Ave. Wenatchee, WA 98801 Phone: (509) 663-8181 ext 238 Fax: (509) 662-8714 E-mail: jfb@wsu.edu Keith R. Granger Michael D. Doerr Codling moth (CM): Cydia pomonella (L.) This experiment was conducted in a 27-yr-old block of 'Delicious' apple at the WSU Tree Fruit Research and Extension Center in Wenatchee, WA. Treatments were applied to one-tree plots replicated four times in a RCB design. A one-tree buffer (unsprayed tree) was left between each replicate to reduce over-spray from drift. All treatments were applied with a handgun sprayer at 300 psi to drip, simulating a full dilute spray. CM injury evaluations were made at the end of each CM generation: 21 Jun (first generation) and 27 Aug (second generation). One hundred apples from each replicate (400 per treatment) were examined on the tree after the first generation and the number of CM injured fruit recorded. After the second generation one hundred fruit were picked from each replicate (400 per treatment) and examined for damage by CM. In addition to the number of fruit damaged by CM the total number of entries and stings were also recorded. Data were analyzed using a one-way ANOVA and mean separation was by Fisher’s LSD (P = 0.05). Control programs that included HMO followed by a tank-mix-combining a larvicide and ovicide (Clutch + Rimon or Calypso + Intrepid) applied once per CM generation performed very well in this test. In these programs, 1% v/v HMO was applied approximatelu 200 DD after first moth flight in each CM generation. The ovicidal control of the HMO allowed for a delayed application of the larvicide + ovicide tank-mix at 350 DD, or 100 DD later than the traditional first cover timing. By delaying the application of the tank-mix, the period of residual control covered the entire generation. An additional Intrepid + HMO application 18 d after the tank-mix application did not show an increase in control over HMO followed by Intrepid + Calypso. Intrepid + HMO applied alone and Clutch + HMO applied alone did not perform as well as the other treatments. Rimon and Assail both provided control similar to the standard, Guthion. All treatments had significantly less CM injury relative to the untreated check. Second generation First generation 27 Aug 21 Jun Treatment/ Rate % fruit % fruit CM CM a b c c formulation g (AI)/acre Application timing CM injury CM injury entry/fruit stings/fruit Superior Spray Oil 1.0% v/v 206, 1203 0.5cd 8.0d 0.02e 0.06c Clutch 50WG + 85 + 354, 1360 Rimon 0.83EC 118 354, 1360 Superior Spray Oil 1.0% v/v 206, 1203 0.5cd 6.3d 0.03e 0.04c Intrepid 2F + 114 + 354, 1360 Calypso 4F 85 354, 1360 Superior Spray Oil 1.0% v/v 206, 1203 0.3d 7.8d 0.04e 0.05c Intrepid 2F + 114 + 354, 1360 Calypso 4F 85 354, 1360 Intrepid 2F 114 354 +18d, 1360, +18d Superior Spray Oil 1.0% v/v 206, 1203 1.5cd 34.8bc 0.26d 0.21a Intrepid 2F 114 354, +18d, 1360, +18d Clutch 50WG 85 243, +14d, +28d, 1203, +14d, +28 2.8bcd 29.8c 0.27cd 0.14b Rimon 0.83EC 118 84, +14d, +28d, 998, +14d, +28d 0.3d 5.8d 0.03e 0.03c Assail 70WP 68 243, +21d, 1203, +21d 1.0cd 7.3d 0.05e 0.04c Guthion 50WP 454 243, +21d, 1203, +21d 0.5cd 1.3e 0.01e 0.01c Untreated check -- -- 16.0a 58.3a 1.02a 0.15ab Means in the same column followed by the same letter are not significantly different (Fisher’s LSD, P > 0.05). Timing reported as accumulated CM degree days unless followed by ‘d’ indicating the calendar day interval between applications. Statistics performed on transformed data: Arcsine-square root (y). Statistics performed on transformed data: Square-root (y+0.5). Superior Spray Oil added as adjuvant at 0.25% v/v. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EFFICACY EVALUATIONS OF NEW INSECTICIDES FOR CODLING MOTH CONTROL ON APPLE, 2004A

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
DOI
10.1093/amt/31.1.A6
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Abstract

(A6) APPLE: Malus domestica Borkhausen, 'Delicious' EFFICACY EVALUATIONS OF NEW INSECTICIDES FOR CODLING MOTH CONTROL ON APPLE, 2004A Jay F. Brunner Tree Fruit Research and Extension Center Washington State University 1100 N. Western Ave. Wenatchee, WA 98801 Phone: (509) 663-8181 ext 238 Fax: (509) 662-8714 E-mail: jfb@wsu.edu Keith R. Granger Michael D. Doerr Codling moth (CM): Cydia pomonella (L.) This experiment was conducted in a 27-yr-old block of 'Delicious' apple at the WSU Tree Fruit Research and Extension Center in Wenatchee, WA. Treatments were applied to one-tree plots replicated four times in a RCB design. A one-tree buffer (unsprayed tree) was left between each replicate to reduce over-spray from drift. All treatments were applied with a handgun sprayer at 300 psi to drip, simulating a full dilute spray. CM injury evaluations were made at the end of each CM generation: 21 Jun (first generation) and 27 Aug (second generation). One hundred apples from each replicate (400 per treatment) were examined on the tree after the first generation and the number of CM injured fruit recorded. After the second generation one hundred fruit were picked from each replicate (400 per treatment) and examined for damage by CM. In addition to the number of fruit damaged by CM the total number of entries and stings were also recorded. Data were analyzed using a one-way ANOVA and mean separation was by Fisher’s LSD (P = 0.05). Control programs that included HMO followed by a tank-mix-combining a larvicide and ovicide (Clutch + Rimon or Calypso + Intrepid) applied once per CM generation performed very well in this test. In these programs, 1% v/v HMO was applied approximatelu 200 DD after first moth flight in each CM generation. The ovicidal control of the HMO allowed for a delayed application of the larvicide + ovicide tank-mix at 350 DD, or 100 DD later than the traditional first cover timing. By delaying the application of the tank-mix, the period of residual control covered the entire generation. An additional Intrepid + HMO application 18 d after the tank-mix application did not show an increase in control over HMO followed by Intrepid + Calypso. Intrepid + HMO applied alone and Clutch + HMO applied alone did not perform as well as the other treatments. Rimon and Assail both provided control similar to the standard, Guthion. All treatments had significantly less CM injury relative to the untreated check. Second generation First generation 27 Aug 21 Jun Treatment/ Rate % fruit % fruit CM CM a b c c formulation g (AI)/acre Application timing CM injury CM injury entry/fruit stings/fruit Superior Spray Oil 1.0% v/v 206, 1203 0.5cd 8.0d 0.02e 0.06c Clutch 50WG + 85 + 354, 1360 Rimon 0.83EC 118 354, 1360 Superior Spray Oil 1.0% v/v 206, 1203 0.5cd 6.3d 0.03e 0.04c Intrepid 2F + 114 + 354, 1360 Calypso 4F 85 354, 1360 Superior Spray Oil 1.0% v/v 206, 1203 0.3d 7.8d 0.04e 0.05c Intrepid 2F + 114 + 354, 1360 Calypso 4F 85 354, 1360 Intrepid 2F 114 354 +18d, 1360, +18d Superior Spray Oil 1.0% v/v 206, 1203 1.5cd 34.8bc 0.26d 0.21a Intrepid 2F 114 354, +18d, 1360, +18d Clutch 50WG 85 243, +14d, +28d, 1203, +14d, +28 2.8bcd 29.8c 0.27cd 0.14b Rimon 0.83EC 118 84, +14d, +28d, 998, +14d, +28d 0.3d 5.8d 0.03e 0.03c Assail 70WP 68 243, +21d, 1203, +21d 1.0cd 7.3d 0.05e 0.04c Guthion 50WP 454 243, +21d, 1203, +21d 0.5cd 1.3e 0.01e 0.01c Untreated check -- -- 16.0a 58.3a 1.02a 0.15ab Means in the same column followed by the same letter are not significantly different (Fisher’s LSD, P > 0.05). Timing reported as accumulated CM degree days unless followed by ‘d’ indicating the calendar day interval between applications. Statistics performed on transformed data: Arcsine-square root (y). Statistics performed on transformed data: Square-root (y+0.5). Superior Spray Oil added as adjuvant at 0.25% v/v.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2006

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