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Toxicity of DDT and Related Compounds to Certain Lepidopteran Cotton Insects1,2

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Deutero-DDT (1,1 ,1-trichloro-2,2- bis (p-chlorophenyl) ethane-2d2), applied as a conventional low-volume spray, was the most effective of several diphenyl aliphatics against larvae of the tobacco budworm, Heliothis vires- cens (F.); the bollworm, H. zea (Boddie); and the cab- bage looper, Trichoplusia ni (Hübner). In topical applications Dilan® (a mixture of I part of I,I-bis(p-chloro- phenyl) -2-nitropropane (Prolan®) and 2 parts of I)-bis (p-chlorophenyl) -2-nitrobutane (Bulan®), was the most toxic compound to tobacco bud worm larvae, and Prolan applied topically was more toxic than Bulan to bollworm and tobacco budworm larvae. Ultra-low-volume sprays of DDT were more effective than conventional low-volume sprays to pink bollworm, Pectinophorn gossypiella (Saunders) , adults immediately after application. The LD50 values for DDT applied topically to several strains of cab bage loopers collected throughout the country were almost always greater than that for our laboratory strain (0.2 mg/g) a strain from Ohio had an LD50of 6.8 mg/g, 34 times that of the laboratory strain.

Document Type: Research Article

Publication date: April 1, 1969

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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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