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CONTROL OF THE DIAMONDBACK MOTH UNDER FIELD CONDITIONS, 2003

CONTROL OF THE DIAMONDBACK MOTH UNDER FIELD CONDITIONS, 2003 (E11) CABBAGE: Brassica oleracea capitata L., 'Gourmet' Dakshina R. Seal University of Florida-IFAS Tropical Research and Education Center Homestead, FL. 33031 Phone: (305) 246-7001x 260 Fax: (305) 246-7003 E-mail: dseal@mail.ifas.ufl.edu Diamondback moth (DBM): Plutella xylostella (L.) Transplants were set on 20 Apr 2003 at the Tropical Research and Education Center, Homestead, FL. Plots were two beds wide on 36-inch centers, 25-ft long and separated by a 5-ft. alley. Plants were spaced 18 inches within the rows. Each treatment was replicated four times in a RCB design. Treatments were applied at weekly intervals on 24 May, 1, 8 and 14 Jun 2003. Spray applications of insecticides were made using a backpack sprayer with two D-4 hollow cone nozzles/ bed delivering 75 gpa at 30 psi. Five plants per plot were randomly selected and thoroughly inspected for DBM small, medium, and large larvae 24 h after each spray. Data were analyzed using ANOVA and means were separated using DMRT (P ≤ 0.05). Population abundance of DBM was low during this study. There were no phytotoxic effects to the cabbage foliage due to the application of any of the treatments. Mana Bifenthrin and Capture at all rates provided significant reduction of DBM small larvae when compared with the nontreated control; although the reduction was inconsistent on different sampling dates at the lowest rate of both insecticides (Table 1). Both insecticides provided similar pattern of control to DBM medium larvae (Table 2). Mana Bifenthrin at 0.02 lb (AI)/acre consistently reduced DBM large larvae on all sampling dates when compared with the nontreated control (Table 3). Other treatments were also effective in controlling DBM large larvae with some exception on some sampling dates. When data of all development stages were considered together, both Mana Bifenthrin and Capture provided control of DBM (Table 4). Both insecticides at 0.1 and 0.2 lb (AI)/acre provided better control of DBM than at 0.03 lb (AI)/acre. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

CONTROL OF THE DIAMONDBACK MOTH UNDER FIELD CONDITIONS, 2003

Seal, Dakshina R.
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.E11
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Abstract

(E11) CABBAGE: Brassica oleracea capitata L., 'Gourmet' Dakshina R. Seal University of Florida-IFAS Tropical Research and Education Center Homestead, FL. 33031 Phone: (305) 246-7001x 260 Fax: (305) 246-7003 E-mail: dseal@mail.ifas.ufl.edu Diamondback moth (DBM): Plutella xylostella (L.) Transplants were set on 20 Apr 2003 at the Tropical Research and Education Center, Homestead, FL. Plots were two beds wide on 36-inch centers, 25-ft long and separated by a 5-ft. alley. Plants were spaced 18 inches within the rows. Each treatment was replicated four times in a RCB design. Treatments were applied at weekly intervals on 24 May, 1, 8 and 14 Jun 2003. Spray applications of insecticides were made using a backpack sprayer with two D-4 hollow cone nozzles/ bed delivering 75 gpa at 30 psi. Five plants per plot were randomly selected and thoroughly inspected for DBM small, medium, and large larvae 24 h after each spray. Data were analyzed using ANOVA and means were separated using DMRT (P ≤ 0.05). Population abundance of DBM was low during this study. There were no phytotoxic effects to the cabbage foliage due to the application of any of the treatments. Mana Bifenthrin and Capture at all rates provided significant reduction of DBM small larvae when compared with the nontreated control; although the reduction was inconsistent on different sampling dates at the lowest rate of both insecticides (Table 1). Both insecticides provided similar pattern of control to DBM medium larvae (Table 2). Mana Bifenthrin at 0.02 lb (AI)/acre consistently reduced DBM large larvae on all sampling dates when compared with the nontreated control (Table 3). Other treatments were also effective in controlling DBM large larvae with some exception on some sampling dates. When data of all development stages were considered together, both Mana Bifenthrin and Capture provided control of DBM (Table 4). Both insecticides at 0.1 and 0.2 lb (AI)/acre provided better control of DBM than at 0.03 lb (AI)/acre.

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Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2004

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