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Cabbage Caterpillars: Efficacy of Chlordimeform and Bacillus thuringiensis in Spray Mixtures and Comparative Efficacy of Several Chemical and B. thuringiensis formulations

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At least 1/16 lb/acre each of chlordimeform hydrochloride and Bacillus thuringiensis Berliner in a spray were needed for effective protection to cabbage against the cabbage looper, Trichoplusia ni (Hübner), the imported cabbageworm, Pieris rapae (L.), and the diamondback moth, Plutella xylostella (L.). Emulsifiable concentrate formulations of chlordimeform gave better plant protection and tended to give a greater reduction of the cabbage looper population than did a soluble powder formulation of chlordimeform hydrochloride. The addition of foam to the B. thuringiensis spray did not increase plant protection and injured the foliage. A liquid formulation of B. thuringiensis gave more effective plant protection than a wettable powder formulation even though looper populations were generally higher on plots treated with the liquid formulation. Neither formulation was as effective as Dipel® (Bacillus thuringiensis var. alesti Berliner) in reducing plant damage. Acephate and Monitor® (0 S dimethyl phosphoramidothioate) provided more effective plant protection than did the other compounds.

Document Type: Research Article

Publication date: February 1, 1975

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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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