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EVALUATION OF FOLIAR INSECTICIDES FOR CONTROL OF BEAN LEAF BEETLE IN SNAP BEANS, 2003

EVALUATION OF FOLIAR INSECTICIDES FOR CONTROL OF BEAN LEAF BEETLE IN SNAP BEANS, 2003 (E2) BEAN (SNAP): Phaseolus vulgaris L., 'Bronco' EVALUATION OF FOLIAR INSECTICIDES FOR CONTROL OF BEAN LEAF BEETLE IN SNAP BEANS, 2003 Thomas P. Kuhar Virginia Tech 33446 Research Drive Painter, VA 23420 Phone: (757) 414-0724 ext 14 E-mail: tkuhar@vt.edu John Speese III E-mail: jspeese@vt.edu Bean leaf beetle (BLB): Cerotoma trifurcata (Forster) The experiment included nine treatments plus an untreated control arranged in a RCB design replicated four times. Each plot consisted of a single 25-ft-long row spaced 3 ft apart. Plots were flanked by one untreated row. Snap beans were planted on 21 Aug at the Eastern Shore Agricultural Research and Extension Center near Painter, VA. Insecticide applications were made on 23 Sep and 2 and 8 Oct using a propane- pressurized backpack sprayer that had a boom equipped with a single hollow-cone nozzle calibrated to deliver 29 gpa at 40 psi. The first application was made at early-bloom stage following a relatively heavy colonization of beetles in the beans a few days prior to spraying. The remaining two applications corresponded with pin to pod stage beans. On 24 Sep (approximately 24 h after first application), the number of live BLB per plot was sampled using a beat cloth that sampled a 3-ft section of row. On 16 Oct, a random sample of 50 pods was harvested from each plot and examined for damage. Data were analyzed using ANOVA and treatment means were separated using LSD (P £ 0.05). Proportion damaged pods were transformed before analysis [arcsin(sqrt(x + 0.0001))], but actual percentage values are presented in the table. The infestation level of BLB was relatively high. On 24 Sep, all treatments resulted in significantly fewer live BLB than the untreated check. The pyrethroids, Capture, Mustang Max, Warrior, and Asana XL had fewer live BLB than Avaunt. At harvest, all treatments had a significantly lower percentage of BLB damaged pods than the untreated check, and Capture had a lower percentage damaged pods than Asana XL. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF FOLIAR INSECTICIDES FOR CONTROL OF BEAN LEAF BEETLE IN SNAP BEANS, 2003

Kuhar, Thomas P.; Speese, John
Arthropod Management Tests , Volume 29 (1) – Jan 1, 2004
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Oxford University Press
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© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/29.1.E2
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Abstract

(E2) BEAN (SNAP): Phaseolus vulgaris L., 'Bronco' EVALUATION OF FOLIAR INSECTICIDES FOR CONTROL OF BEAN LEAF BEETLE IN SNAP BEANS, 2003 Thomas P. Kuhar Virginia Tech 33446 Research Drive Painter, VA 23420 Phone: (757) 414-0724 ext 14 E-mail: tkuhar@vt.edu John Speese III E-mail: jspeese@vt.edu Bean leaf beetle (BLB): Cerotoma trifurcata (Forster) The experiment included nine treatments plus an untreated control arranged in a RCB design replicated four times. Each plot consisted of a single 25-ft-long row spaced 3 ft apart. Plots were flanked by one untreated row. Snap beans were planted on 21 Aug at the Eastern Shore Agricultural Research and Extension Center near Painter, VA. Insecticide applications were made on 23 Sep and 2 and 8 Oct using a propane- pressurized backpack sprayer that had a boom equipped with a single hollow-cone nozzle calibrated to deliver 29 gpa at 40 psi. The first application was made at early-bloom stage following a relatively heavy colonization of beetles in the beans a few days prior to spraying. The remaining two applications corresponded with pin to pod stage beans. On 24 Sep (approximately 24 h after first application), the number of live BLB per plot was sampled using a beat cloth that sampled a 3-ft section of row. On 16 Oct, a random sample of 50 pods was harvested from each plot and examined for damage. Data were analyzed using ANOVA and treatment means were separated using LSD (P £ 0.05). Proportion damaged pods were transformed before analysis [arcsin(sqrt(x + 0.0001))], but actual percentage values are presented in the table. The infestation level of BLB was relatively high. On 24 Sep, all treatments resulted in significantly fewer live BLB than the untreated check. The pyrethroids, Capture, Mustang Max, Warrior, and Asana XL had fewer live BLB than Avaunt. At harvest, all treatments had a significantly lower percentage of BLB damaged pods than the untreated check, and Capture had a lower percentage damaged pods than Asana XL.

Journal

Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2004

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