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Effect of Surfactants, Bacillus thuringiensis Formulations, and Plant Damage on Oviposition by Diamondback Moth (Lepidoptera: Plutellidae)

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Abstract:

Greenhouse and field studies were conducted 1993-1994 to investigate the effects of 2 surfactants, 2 insecticides containing toxins from Bacillus thuringiensis Berliner, and plant damage on oviposition by the diamondback moth, Plutella xylostella (L.). Greenhouse studies showed no significant difference between the number of eggs laid by moths on broccoli plants treated with B. thuringiensis plus surfactant relative to plants treated with surfactant alone. All greenhouse tests, however, showed that 4-8 times as many eggs were laid on plants treated with the surfactants Latron CS-7 or Ortho X-77 compared with control plants. A positive linear relationship was observed between the number of eggs deposited on a plant and the extent to which that plant had been damaged by herbivory before oviposition occurred. Field tests showed that for plants with equal herbivore damage, moths laid significantly more eggs on plants treated with a tank mi'{of B. thuringiensis plus the surfactant Latron CS-7 compared with nontreated plants. These data indicate that diamondback moths prefer to lay eggs on plants treated with certain surfactants and also show preference for plants with feeding damage.

Document Type: Research Article

Publication date: August 1, 1996

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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