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Control of Lepidopterous Insects on Corn with Foliar Applications, 1996

Control of Lepidopterous Insects on Corn with Foliar Applications, 1996 Downloaded from https://academic.oup.com/amt/article-abstract/22/1/124/4640093 by DeepDyve user on 21 July 2020 124 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS! CORN (SWEET): Zea mays L. 'More' A. M. Shelton and W. T. Wilsey (46E)j Corn earworm: Helioverpa zea (Boddie) Department of Entomology Fall army worm : Spodoptera frugiperda NYS Agric. Expt. Station (J. E. Smith) Geneva, NY 14456 European corn borer: Ostrinia nubilalis (315)787-2352 (Hiibner) CONTRO L OF LEPIDOPTEROUS INSECTS O N COR N WITH FOLIAR APPLICATIONS, 1996: Corn was planted on 27 Jun at the Veg-j etable Crops Research Farm near Geneva, NY. The planting consisted of a RCB design with four replicates of six treatments and one untreated check.! Plots consisted of six 25-ft rows of sweet corn on 3 ft centers with 9-inch plant spacing. Blocks were separated by 25 ft. Treatments consisted of three ap-} plications of each insecticide for naturally intesting lepidopterans. Foliar sprays were applied with a 4-row high-boy tractor-mounted boom, having 3 noz-i zles per row with flat fan 110015 tips, and delivering 26.4 gpa at 47 psi and 2.5 mph. Silwet sticker-spreader was applied at 0.1 % v/v with all foliar treat-j ments. Insecticides were applied on 4, 11 and 20 Sep. On 7 Oct, 25 ears from the four treated rows of each plot were evaluated for ear injury. j All insecticide treatments provided significantly more undamaged ears (76-98%) than the untreated check (50%). Between treatments, Dipel ES at i 2 pt./acre had significantly more damaged ears compared with other foliar treatments. No phytotoxicity was observed in any of the treatments. Treatment Rate/acre % undamaged ears Warrior 1 EC 0.015 lb(AI) 98 Baythroid 2 EC 0.025 lb(AI) 96 Larvin 3.2 EC 0.50 lb(AI) Capture 2 EC 0.05 lb(AI) Pounce 3.2 EC 0.50 lb(AI) Dipel ES 2pt . Untreated 50 LSD (P = 0.05) 10.7 Id http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Control of Lepidopterous Insects on Corn with Foliar Applications, 1996

Shelton, A., M.; Wilsey, W., T.
Arthropod Management Tests , Volume 22 (1) – Jan 1, 1997
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Publisher
Oxford University Press
Copyright
© 1997 Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/22.1.124
Publisher site
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/22/1/124/4640093 by DeepDyve user on 21 July 2020 124 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS! CORN (SWEET): Zea mays L. 'More' A. M. Shelton and W. T. Wilsey (46E)j Corn earworm: Helioverpa zea (Boddie) Department of Entomology Fall army worm : Spodoptera frugiperda NYS Agric. Expt. Station (J. E. Smith) Geneva, NY 14456 European corn borer: Ostrinia nubilalis (315)787-2352 (Hiibner) CONTRO L OF LEPIDOPTEROUS INSECTS O N COR N WITH FOLIAR APPLICATIONS, 1996: Corn was planted on 27 Jun at the Veg-j etable Crops Research Farm near Geneva, NY. The planting consisted of a RCB design with four replicates of six treatments and one untreated check.! Plots consisted of six 25-ft rows of sweet corn on 3 ft centers with 9-inch plant spacing. Blocks were separated by 25 ft. Treatments consisted of three ap-} plications of each insecticide for naturally intesting lepidopterans. Foliar sprays were applied with a 4-row high-boy tractor-mounted boom, having 3 noz-i zles per row with flat fan 110015 tips, and delivering 26.4 gpa at 47 psi and 2.5 mph. Silwet sticker-spreader was applied at 0.1 % v/v with all foliar treat-j ments. Insecticides were applied on 4, 11 and 20 Sep. On 7 Oct, 25 ears from the four treated rows of each plot were evaluated for ear injury. j All insecticide treatments provided significantly more undamaged ears (76-98%) than the untreated check (50%). Between treatments, Dipel ES at i 2 pt./acre had significantly more damaged ears compared with other foliar treatments. No phytotoxicity was observed in any of the treatments. Treatment Rate/acre % undamaged ears Warrior 1 EC 0.015 lb(AI) 98 Baythroid 2 EC 0.025 lb(AI) 96 Larvin 3.2 EC 0.50 lb(AI) Capture 2 EC 0.05 lb(AI) Pounce 3.2 EC 0.50 lb(AI) Dipel ES 2pt . Untreated 50 LSD (P = 0.05) 10.7 Id

Journal

Arthropod Management Tests – Oxford University Press

Published: Jan 1, 1997

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