Toxicological Studies on Cutworms. X. Laboratory and Field Microplot Studies on Effectiveness and Persistence of Some Experimental Insecticides Used to Control the Black Cutworm¹ in Organic Soil²

Authors: HARRIS, C. R.; SVEC, H. J.; SANS, W. W.

Source: Journal of Economic Entomology, Volume 66, Number 1, February 1973 , pp. 203-208(6)

Publisher: Entomological Society of America

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Abstract:

Laboratory and field microplot tests were conducted to determine the effectiveness of some experimental insecticides in controlling Agrotis ipsilon (Hufnagel) attacking vegetables grown on organic soil. Primary screening tests in the laboratory with 12 insecticides indicated that 8 were more toxic by contact than DDT, and 4 as or more toxic than endrin to ,3rd-stage cutworms. Secondary laboratory screening tests done with 6 of the insecticides applied as EC formulations to the surface of moist and air-dry organic soil indicated that chlorpyrifos, leptophos, Stauffer N-2596 (S-(p-ch10ropheny1) O-ethyl ethylphosphonodithioate), and Bay 77049 (OO-diethyl O- (2-quinoxalinyl) phosphorothioate) were most promising-. Microplot field trials, using plots seeded to onions and artificially infested with 4th-stage cutworms, indicated that leptophos was most effective > chlorpyrifos > N- 2596 > DDT. Residues of all 3 experimental insecticides were moderately persistent in organic soil, but no residues were detected in onions harvested from the plots treated at the highest rate of insecticide application of 2.24 kg active ingredient per hectare. It was concluded that leptophos and chlorpyrifos wan-ant field testing on a larger scale for black cutworm control on organic soil.

Document Type: Research article

Publication date: 1973-02-01

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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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