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RESIDUAL ACTIVITY OF FOLIAR APPLIED INSECTICIDES FOR CONTROLLING SQUASH BUG, 2002

RESIDUAL ACTIVITY OF FOLIAR APPLIED INSECTICIDES FOR CONTROLLING SQUASH BUG, 2002 (E69) SQUASH: Cucurbita pepo L., 'Lemondrop' RESIDUAL ACTIVITY OF FOLIAR APPLIED INSECTICIDES FOR CONTROLLING SQUASH BUG, 2002 J. V. Edelson Oklahoma State University Lane, OK 74555 Tel: 580-889-7343 jedelson-okstate@lane-ag.org J. Duthie W. Roberts Squash bug (SB): Anasa tristis (De Geer) Squash was direct seeded to a field at the Wes Watkins AREC, Lane, on 15 Aug. The experimental design was a RCB with 12 treatments and five replicate blocks with plots on 9 ft row spacing, 20 ft long with 20 ft alleys cut between plots in rows. Plants were thinned to a 12 inch spacing in plots. Plots were treated on 15 Sep using a tractor-mounted sprayer with three hollow-cone nozzles per row, one nozzle directed over the row and one nozzle on each side of the row on drops directed at an angle into the crop canopy. The sprayer was operated at 40 psi and delivered 20 gpa. Bioassays were conducted by placing adult female squash bugs in plastic 1 oz creamer cups and clipping them to the bottom of a lower crown leaf on one plant in each plot. Mortality of bugs was assessed after 24 h. Data were analyzed using ANOVA and LSD to make comparisons among treatments. Squash bugs were not abundant and therefore adult bugs from a laboratory culture were used to bioassay residual activity of insecticides 24 h after applications. Disulfoton and thiamethoxam were the only insecticides that resulted in significant mortality of adult squash bugs. Both of these insecticides are systemic and as expected were active when adult squash bugs were caged on the lower side of leaves 24 h after the application of insecticides. Based on these results we predict that disulfoton and thiamethoxam will provide the best residual control of adult squash bugs moving within and among plants in fields. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

RESIDUAL ACTIVITY OF FOLIAR APPLIED INSECTICIDES FOR CONTROLLING SQUASH BUG, 2002

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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/28.1.E69
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Abstract

(E69) SQUASH: Cucurbita pepo L., 'Lemondrop' RESIDUAL ACTIVITY OF FOLIAR APPLIED INSECTICIDES FOR CONTROLLING SQUASH BUG, 2002 J. V. Edelson Oklahoma State University Lane, OK 74555 Tel: 580-889-7343 jedelson-okstate@lane-ag.org J. Duthie W. Roberts Squash bug (SB): Anasa tristis (De Geer) Squash was direct seeded to a field at the Wes Watkins AREC, Lane, on 15 Aug. The experimental design was a RCB with 12 treatments and five replicate blocks with plots on 9 ft row spacing, 20 ft long with 20 ft alleys cut between plots in rows. Plants were thinned to a 12 inch spacing in plots. Plots were treated on 15 Sep using a tractor-mounted sprayer with three hollow-cone nozzles per row, one nozzle directed over the row and one nozzle on each side of the row on drops directed at an angle into the crop canopy. The sprayer was operated at 40 psi and delivered 20 gpa. Bioassays were conducted by placing adult female squash bugs in plastic 1 oz creamer cups and clipping them to the bottom of a lower crown leaf on one plant in each plot. Mortality of bugs was assessed after 24 h. Data were analyzed using ANOVA and LSD to make comparisons among treatments. Squash bugs were not abundant and therefore adult bugs from a laboratory culture were used to bioassay residual activity of insecticides 24 h after applications. Disulfoton and thiamethoxam were the only insecticides that resulted in significant mortality of adult squash bugs. Both of these insecticides are systemic and as expected were active when adult squash bugs were caged on the lower side of leaves 24 h after the application of insecticides. Based on these results we predict that disulfoton and thiamethoxam will provide the best residual control of adult squash bugs moving within and among plants in fields.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2003

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