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Sunflowers were sprayed 2, 3, and 4 times during the growing season with either malathion at 1.25 lb per acre, or methyl parathion, diazinon, or endosulfan at 1.0 lb per acre. Mature seeds contained 0.01 ppm malathion and methyl parathion, 0.03 ppm diazinon, and 0.06 ppm endosulfan when the plants were sprayed twice, 48 and 41 days before harvest. Residues in the seeds were approximately the same after a third spray was applied 28 days prior to harvest. Seeds from plants treated a fourth time 14 days before harvest contained 0.01 ppm malathion, 0.04 ppm methyl parathion, 0.07 ppm diazinon, and 0.13 ppm endosulfan.
Document Type: Research Article
Publication date: April 1, 1969
More about this publication?
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.