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EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON SEEDLING WATERMELON, 2006

EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON SEEDLING WATERMELON, 2006 (E66) WATERMELON: Citrullus lanatus (Thunb.) Matsumura & Nakai, ‘Black Diamond’ EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON SEEDLING WATERMELON, 2006 Paul McLeod Larry Martin Steve Eaton Department of Entomology University of Arkansas 320 Agriculture Building Fayetteville, Arkansas 72701 Phone: (501) 575-3397 Fax: (501) 575-3348 Email: pjmcleod@uark.edu Striped cucumber beetle: Acalymma vittatum (F.) Spotted cucumber beetle: Diabrotica undecimpunctata howardi Barber The objective of the study was to evaluate the effectiveness of seed applied insecticides for management of cucumber beetles on seedling watermelon. Plots were located at the University of Arkansas Vegetable Station, Kibler, Arkansas. Soil type is sandy loam. Plots consisted of a single 6-ft wide bed 35 ft long. Experimental design was RCB with four replications. Treated ‘Black Diamond ’ watermelon seeds were obtained from two sources. The first four treatments (see table) were supplied by Dr. Jack Norton, Cornell University. The remaining three treatments were obtained by submerging ‘Black Diamond ’ watermelon seeds in 10 % concentrations of formulated insecticide (Cruiser 5S, Gaucho 600 or Poncho 600). After 10 min, seeds were removed and air dried on paper toweling. Seeds were hand planted on 6 Jul 2006. Seeds were placed every 2 ft within each plot. Sampling was initiated on 26 Jul (20 days after planting) when plants had cotyledon leaves. Within each plot the two cotyledon bottoms of each of 10 plants were rated for cucumber beetle feeding. Ratings ranged from 0 (no damage) to 5 (completely damaged). Also, the number of dead cucumber beetles under each rated plant was determined. Data were analyzed with ANOVA and LSD. Adult cucumber beetle population levels were moderate during the study. Foliar feeding damage on plants grown with non- treated seed was moderate on 26 Jul. Each seed treatment significantly reduced the level of cucumber beetle feeding. The n of dead cucumber beetles was significantly greater for the three seed dip treatments. Treatment/ Foliar No. dead beetles formlation Concentration damage rating per sample Cruiser 5S 0.092 mg ai/seed 0.4cd 0.0a Gaucho 480 0.115 mg ai/seed 0.2d 0.0a Regent 500 0.092 mg ai/seed 1.0b 0.0a Regent 500 0.184mg ai/seed 0.9bc 0.0a Cruiser 5S 10 % seed dip 0.0d 1.3d Gaucho 600 10 % seed dip 0.3d 0.8c Poncho 600 10 % seed dip 0.0d 0.4b Check --- 3.1a 0.0a Within column means followed by same letter do not differ significantly (LSD; p = 0.05). Ratings ranged from 0 (no damage) to 5 (completely damaged). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON SEEDLING WATERMELON, 2006

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/32.1.E66
Publisher site
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Abstract

(E66) WATERMELON: Citrullus lanatus (Thunb.) Matsumura & Nakai, ‘Black Diamond’ EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON SEEDLING WATERMELON, 2006 Paul McLeod Larry Martin Steve Eaton Department of Entomology University of Arkansas 320 Agriculture Building Fayetteville, Arkansas 72701 Phone: (501) 575-3397 Fax: (501) 575-3348 Email: pjmcleod@uark.edu Striped cucumber beetle: Acalymma vittatum (F.) Spotted cucumber beetle: Diabrotica undecimpunctata howardi Barber The objective of the study was to evaluate the effectiveness of seed applied insecticides for management of cucumber beetles on seedling watermelon. Plots were located at the University of Arkansas Vegetable Station, Kibler, Arkansas. Soil type is sandy loam. Plots consisted of a single 6-ft wide bed 35 ft long. Experimental design was RCB with four replications. Treated ‘Black Diamond ’ watermelon seeds were obtained from two sources. The first four treatments (see table) were supplied by Dr. Jack Norton, Cornell University. The remaining three treatments were obtained by submerging ‘Black Diamond ’ watermelon seeds in 10 % concentrations of formulated insecticide (Cruiser 5S, Gaucho 600 or Poncho 600). After 10 min, seeds were removed and air dried on paper toweling. Seeds were hand planted on 6 Jul 2006. Seeds were placed every 2 ft within each plot. Sampling was initiated on 26 Jul (20 days after planting) when plants had cotyledon leaves. Within each plot the two cotyledon bottoms of each of 10 plants were rated for cucumber beetle feeding. Ratings ranged from 0 (no damage) to 5 (completely damaged). Also, the number of dead cucumber beetles under each rated plant was determined. Data were analyzed with ANOVA and LSD. Adult cucumber beetle population levels were moderate during the study. Foliar feeding damage on plants grown with non- treated seed was moderate on 26 Jul. Each seed treatment significantly reduced the level of cucumber beetle feeding. The n of dead cucumber beetles was significantly greater for the three seed dip treatments. Treatment/ Foliar No. dead beetles formlation Concentration damage rating per sample Cruiser 5S 0.092 mg ai/seed 0.4cd 0.0a Gaucho 480 0.115 mg ai/seed 0.2d 0.0a Regent 500 0.092 mg ai/seed 1.0b 0.0a Regent 500 0.184mg ai/seed 0.9bc 0.0a Cruiser 5S 10 % seed dip 0.0d 1.3d Gaucho 600 10 % seed dip 0.3d 0.8c Poncho 600 10 % seed dip 0.0d 0.4b Check --- 3.1a 0.0a Within column means followed by same letter do not differ significantly (LSD; p = 0.05). Ratings ranged from 0 (no damage) to 5 (completely damaged).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2007

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