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EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON WATERMELON, 2004

EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON WATERMELON, 2004 (E97) WATERMELON: Citrullus lanatus (Thunb.) Matsumura & Nakai, ‘Black Diamond’ EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON WATERMELON, 2004 Paul McLeod Department of Entomology University of Arkansas 320 Agriculture Building Fayetteville, Arkansas 72701 Phone: (501) 575-3397 Fax: (501) 575-3348 E-mail: pjmcleod@uark.edu Striped cucumber beetle (STCB): Acalymma vittatum (Fabricius) Spotted cucumber beetle (SPCB): Diabrotica undecimpunctata howardi Barber The objective of the study was to evaluate the effectiveness of seed applied insecticides for management of cucumber beetles on watermelon. Plots were located in a commercial zucchini field in Stark City, MO. Plots consisted of a single 6-ft wide bed × 35 ft long. Experimental design was RCB with four replications. ‘Black Diamond’ watermelon seed were submerged in one of five concentrations of Admire 2F: water dilutions, i.e., 40; 20; 10, 5 and 1%. After 10 min seed were removed and air dried on paper toweling. Additional seed were treated with water only. Seed were hand planted on 28 Jun 2004. Seed was placed every 3 ft. within each plot. Sampling was initiated on 5 Jul (14 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). Additional samples were taken on 12 and 19 Jul. All foliage was rated for damage during the last two sample periods. Data were analyzed with ANOVA and LSD (P ≤ 0.05). Adult SPCB and STCB population levels were moderate during the study. Foliar feeding damage was relative low on 5 Jul, however, damage was significantly lower for all seed treatments. On 12 Jul damage ratings ranged from 0.0 for plants produced from seed treated with 40% Admire to 1.4 for plants in the control. Foliar feeding was significantly reduced for all Admire concentrations. A similar trend was observed during the 19 Jul sample. Foliar damage rating Treatment/ formulation Concentration 5 Jul 12 Jul 19 Jul Admire 2F 1% 0.1b 0.6bc 1.7ab Admire 2F 5% 0.1b 0.7b 1.4bc Admire 2F 10% 0.2b 0.3bc 1.1bc Admire 2F 20% 0.1b 0.3bc 1.0c Admire 2F 40% 0.0b 0.0c 1.1bc Water check -- 0.7a 1.4a 2.2a Within column means followed by same letter do not differ significantly (P > 0.05, LSD). 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 WATERMELON, 2004

Arthropod Management Tests , Volume 30 (1) – Jan 1, 2005

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Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/30.1.E97
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Abstract

(E97) WATERMELON: Citrullus lanatus (Thunb.) Matsumura & Nakai, ‘Black Diamond’ EVALUATION OF SEED APPLIED INSECTICIDES FOR CONTROL OF CUCUMBER BEETLES ON WATERMELON, 2004 Paul McLeod Department of Entomology University of Arkansas 320 Agriculture Building Fayetteville, Arkansas 72701 Phone: (501) 575-3397 Fax: (501) 575-3348 E-mail: pjmcleod@uark.edu Striped cucumber beetle (STCB): Acalymma vittatum (Fabricius) Spotted cucumber beetle (SPCB): Diabrotica undecimpunctata howardi Barber The objective of the study was to evaluate the effectiveness of seed applied insecticides for management of cucumber beetles on watermelon. Plots were located in a commercial zucchini field in Stark City, MO. Plots consisted of a single 6-ft wide bed × 35 ft long. Experimental design was RCB with four replications. ‘Black Diamond’ watermelon seed were submerged in one of five concentrations of Admire 2F: water dilutions, i.e., 40; 20; 10, 5 and 1%. After 10 min seed were removed and air dried on paper toweling. Additional seed were treated with water only. Seed were hand planted on 28 Jun 2004. Seed was placed every 3 ft. within each plot. Sampling was initiated on 5 Jul (14 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). Additional samples were taken on 12 and 19 Jul. All foliage was rated for damage during the last two sample periods. Data were analyzed with ANOVA and LSD (P ≤ 0.05). Adult SPCB and STCB population levels were moderate during the study. Foliar feeding damage was relative low on 5 Jul, however, damage was significantly lower for all seed treatments. On 12 Jul damage ratings ranged from 0.0 for plants produced from seed treated with 40% Admire to 1.4 for plants in the control. Foliar feeding was significantly reduced for all Admire concentrations. A similar trend was observed during the 19 Jul sample. Foliar damage rating Treatment/ formulation Concentration 5 Jul 12 Jul 19 Jul Admire 2F 1% 0.1b 0.6bc 1.7ab Admire 2F 5% 0.1b 0.7b 1.4bc Admire 2F 10% 0.2b 0.3bc 1.1bc Admire 2F 20% 0.1b 0.3bc 1.0c Admire 2F 40% 0.0b 0.0c 1.1bc Water check -- 0.7a 1.4a 2.2a Within column means followed by same letter do not differ significantly (P > 0.05, LSD).

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2005

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