Effects of Organometallic Compounds on Lepidoptera1,2
Lethal effects of some organometallic compounds on larvae of the bollworm, Heliothis zea (Boddie); tobacco budworm, H. virescens (F.); and the cabbage looper, Trichoplusia ni (Hübner), were evaluated. Also, the effect of these compounds on larval weight and hatch of eggs from moths that developed from treated larvae was determined. Acetoxytrimethyltin, hydroxytrimethyltin, and acetoxytriethyllead, caused 92% or more kill of bollworm and tobacco budworm larvae when they were applied topically and 52% or more when they were applied as foliar sprays. Hydroxytrimethyltin, acetoxytriphenyllead, acetoxytrihexyltin, acetoxytributyllead, oxybis[tributyltin], and hydroxytriphenyltin caused the greatest reduction in larval weights of both Heliothis species when they fed on plants treated with the compounds. Less than 2% of the eggs laid by moths emerging from tobacco budworm larvae treated with acetoxytrimethyltin, hydroxytriphenyltin, and oxybis[triphenylgermane] hatched, and hatch was 0.3% or less from moths emerging from bollworm larvae that had been treated with hydroxytriphenyltin and chlorotrioctyltin. It appeared that tobacco budworm moths produced fewer eggs than bollworm moths emerging from reared larvae. Hydroxytriphenyltin reduced the percentage of fruiting forms damaged by Heliothis species by 60% in a field cage and 10% in a field trial. A dosage of 3.36 kg per hectare reduced the larval weight of cabbage looper larvae 75%.
Document Type: Research Article
Publication date: February 1, 1968
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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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