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Effect of Treatment Timing on Control of Larval Striped Cucumber Beetle Injury to Cantaloupe Fruit, 1996

Effect of Treatment Timing on Control of Larval Striped Cucumber Beetle Injury to Cantaloupe... Downloaded from https://academic.oup.com/amt/article-abstract/22/1/114/4640044 by DeepDyve user on 21 July 2020 114 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS Whitney Cranshaw (34E) CANTALOUPE: Cucumis melo L. 'PMR-45' Department of Bioagricultural Sciences and Striped cucumber beetle; Acalymma trivittaum (F.) Pest Management Colorado State University Ft. Collins, CO 80523 Frank Schweissing Arkansas Valley Research Center 27901 Road 21 Rocky Ford, CO 81607 (970)491-6781 EFFECT OF TREATMENT TIMING ON CONTROL OF LARVAL STRIPED CUCUMBER BEETLE INJURY TO CANTALOUPE FRUIT, 1996: Trials were conducted at the Arkansas Valley Research Center, Rocky Ford, CO . Cantaloup 'PMR-45 ' was seeded 31 May to 60-inch rows and individual plots consisted of five, 27-ft rows. Insecticides were applied on three dates (29 Jul, 8 Aug, 18 Aug) with the first applications made to co­ incide with the onset of small fruit. Applications were made using a hand-operated compressed air sprayer delivering 8 gal/A. Evaluations were conducted 27 Aug by examining 10 fruit per plot and rating the amount of larval tunneling injury to the rind, using a 0 (no injury) to 3 (severe rind injury) scale. All the treatments reduced fruit damage by striped cucumber beetle larvae. Among the different treatment timings, plots sustained least damage when treated 29 Jul, approximately one month prior to evaluation. Treatment Mean fruit Mean % plants Insecticide Rate Timing damage rating* marketa Sevin XLR-Plus 1 qt/acre 1 0.43a 92.5 Sevin XLR-Plus 1 qt/acre 0.78b 85.0 Sevin XLR-Plus 1 qt/acre 3 0.83b 72.5 Sevin XLR-Plus 1 qt/acre 1,2 0.18a 97.5 Sevin XLR-Plus 1 qt/acre 2, 3 0.68ab 77.5 Sevin XLR-Plus 1 qt/acre 1,3 0.45a 97.5 Sevin XLR-Plus 1 qt/acre 1,2, 3 0.30a 92.5 Adios 0.75 lb/acre 1,2 0.30a 97.5 Adios 0.75 lb/acre 2, 3 1.13c 60.0 Adios 0.75 lb/acre 1,3 0.53ab 90.0 Asana XL 5.6 fl oz/acre 1,2 0.75b 82.5 Asana XL 5.6 fl oz/acre 2, 3 0.95bc 67.5 Asana XL 5.6 fl oz/acre 1,3 0.63ab 90.0 Untreated Check 1.55d 42.5 Means in a column followed by the same letter are not significantly different (P = 0.05) by SNK. "Treatment dates were 29 Jul (1), 8 Aug (2) and 18 Aug (3) 'Fruit injury scale: 0 - no injury to fruit rind, 1 - slight injury, 2 - moderate injury, 3 - severe injury. 'Plants receiving injury ratings of 2 or 3 were considered not marketable. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

Effect of Treatment Timing on Control of Larval Striped Cucumber Beetle Injury to Cantaloupe Fruit, 1996

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Publisher
Oxford University Press
Copyright
© 1997 Entomological Society of America.
eISSN
2155-9856
DOI
10.1093/amt/22.1.114
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Abstract

Downloaded from https://academic.oup.com/amt/article-abstract/22/1/114/4640044 by DeepDyve user on 21 July 2020 114 Arthropod Management Tests, Vol. 22 E: VEGETABLE CROPS Whitney Cranshaw (34E) CANTALOUPE: Cucumis melo L. 'PMR-45' Department of Bioagricultural Sciences and Striped cucumber beetle; Acalymma trivittaum (F.) Pest Management Colorado State University Ft. Collins, CO 80523 Frank Schweissing Arkansas Valley Research Center 27901 Road 21 Rocky Ford, CO 81607 (970)491-6781 EFFECT OF TREATMENT TIMING ON CONTROL OF LARVAL STRIPED CUCUMBER BEETLE INJURY TO CANTALOUPE FRUIT, 1996: Trials were conducted at the Arkansas Valley Research Center, Rocky Ford, CO . Cantaloup 'PMR-45 ' was seeded 31 May to 60-inch rows and individual plots consisted of five, 27-ft rows. Insecticides were applied on three dates (29 Jul, 8 Aug, 18 Aug) with the first applications made to co­ incide with the onset of small fruit. Applications were made using a hand-operated compressed air sprayer delivering 8 gal/A. Evaluations were conducted 27 Aug by examining 10 fruit per plot and rating the amount of larval tunneling injury to the rind, using a 0 (no injury) to 3 (severe rind injury) scale. All the treatments reduced fruit damage by striped cucumber beetle larvae. Among the different treatment timings, plots sustained least damage when treated 29 Jul, approximately one month prior to evaluation. Treatment Mean fruit Mean % plants Insecticide Rate Timing damage rating* marketa Sevin XLR-Plus 1 qt/acre 1 0.43a 92.5 Sevin XLR-Plus 1 qt/acre 0.78b 85.0 Sevin XLR-Plus 1 qt/acre 3 0.83b 72.5 Sevin XLR-Plus 1 qt/acre 1,2 0.18a 97.5 Sevin XLR-Plus 1 qt/acre 2, 3 0.68ab 77.5 Sevin XLR-Plus 1 qt/acre 1,3 0.45a 97.5 Sevin XLR-Plus 1 qt/acre 1,2, 3 0.30a 92.5 Adios 0.75 lb/acre 1,2 0.30a 97.5 Adios 0.75 lb/acre 2, 3 1.13c 60.0 Adios 0.75 lb/acre 1,3 0.53ab 90.0 Asana XL 5.6 fl oz/acre 1,2 0.75b 82.5 Asana XL 5.6 fl oz/acre 2, 3 0.95bc 67.5 Asana XL 5.6 fl oz/acre 1,3 0.63ab 90.0 Untreated Check 1.55d 42.5 Means in a column followed by the same letter are not significantly different (P = 0.05) by SNK. "Treatment dates were 29 Jul (1), 8 Aug (2) and 18 Aug (3) 'Fruit injury scale: 0 - no injury to fruit rind, 1 - slight injury, 2 - moderate injury, 3 - severe injury. 'Plants receiving injury ratings of 2 or 3 were considered not marketable.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 1997

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