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Granular formulations of the systemic insecticides phorate and Di-syston® (O,O-diethyl S-2-(ethylthio)ethyl phosphorodithioute) banded beside the seed rows at planting time were effective against potato leafhoppers, Empoasca fabae (Harris); potato flea beetles, Epitrix cucumeris (Harris); and Colorado potato beetles, Leptinotarsa decemlineala (Say) on potatoes; the potato leafhopper and the Mexican bean beetle, Epilachna earirestis Mulsant, on lima beans and corn flea beetles, Chaetoc- nema pulicaria Melsh, on sweet corn. In general, yield increases of potatoes resulting from granulated Di-syston and phorate treatments were not so high as expected from the insect control achieved. Potatoes receiving foliar treatments of phosphamidon and Thiodan® (6,7,8,9,10,10-hexachloro-1 ,5,5a,6,9,9a-hexadro-, 9-methano-2,4,9-benzodioxathiepin 3-oxide) consistently out yielded both the untreated and the traction-treated cheek plots, Yields of sweet corn from all granulated systemic insecticide and nematocide treatments were increased from 0.3 to 0.8 tons per acre although these increases were not significant at the 5% level.
Document Type: Research Article
Publication date: August 1, 1961
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.