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Effect of Topical Applications of Granulated Systemic Insecticides and of Conventional Applications of Other Insecticides on Control of Insects and Spider Mites on Sugar Beet Plants1

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Abstract:

Granulated ph orate and granulated O, O-diethyl S-2-(ethyltthio) ethyl phosphorodithioate (Di-Syston®) were applied topically to large sugar beet plants. With this method of application the large leaves and flat petioles funneled most of the granules onto the plant crown. Both materials gave excellent and persistent reductions of the green peach aphid, Myzus persicae (Sulz.), the southern garden leafhopper, Empoasca solana DeL., and the spider mite, Tetranychus cinnabarinus Bvd., the three most important pests on sugar beet plants in the Imperial Valley after the seedling stage of growth.

No residues of either phorate or Di-Syston were detected in the large roots, but phorate residues in the foliage were 0.07 p.p.m. 29 days after application.

Of other materials evaluated, Thiodan® (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathi-cpin-3-oxide) gave excellent mortality of the green peach aphid; Sevin® (1-naphthyl methyl-carbamate) and ethion were promising when used for control of the southern garden leafhopper; and ethion, Trithion® (S-(p-chlorophenylthiomethyl) O, O-diethyl phosphorodithioate), dcmeton, and Kclthane® (4,4'-dichloro-alpha-(trichloromethyl)-benzhydrol) were all effective in reducing populations of spider mites.

Document Type: Research Article

Publication date: October 1, 1960

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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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