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Artificially reared viruliferous six-spotted leafhoppers, Macrosteles fascifrons (Stal), were caged over small areas of lettuce in the field to test the effectiveness of four insecticides (DDT, demeton, malathion, and parathion) applied as emulsion sprays for lettuce-yellows prevention. This leafhopper is the only known vector for the eastern strain of the virus Chlorogenus callistephi var. vulgaris Holmes, causing lettuce-yellows disease in New York State. Differences were found between sprayed and unsprayed lettuce in the incidence of disease, and in the residual effectiveness of insecticides tested. Differences between insecticides were significant but not readily apparent by mere visual inspection. The use of known populations of viruliferous leafhoppers permitted evaluation of sprays where ordinary small-plot and large-field experiments had failed.
Document Type: Research Article
Publication date: August 1, 1959
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.