Deposits and Persistence of Permethrin ULV and EC Applications on Soybean Leaves
Authors: Southwick, L. M.; Boethel, D. J.; Willis, G. H.; Rester, D. C.; Yanes, J.; Troxclair, N. N.; Sparks, A. N.
Source: Journal of Economic Entomology, Volume 79, Number 1, February 1986 , pp. 202-207(6)
Publisher: Entomological Society of America
Abstract:Permethrin (0.084 kg [AI]/ha) was applied by airplane to soybeans in central Louisiana in three formulations: 1) in water at 18.70 liters/ha (EC-water), 2) in water and soybean oil (3:1) at 9.35 liters/ha (water-oil), and 3) in soybean oil at 2.34 liters/ha (ULV-oil). Leaves from the upper and lower halves of the plants were collected for 2 weeks posttreatment and the surface and interior permethrin residues were determined. The permethrin leaf surface residues from the ULV-oil treatment were consistently higher than those from the EC-water formulation, and the residues from the water-oil application generally were intermediate. For the first 7 days post treatment the ULV-oil formulation provided leaf surface residue levels on the upper plant leaves that were generally significantly higher than those from EC-water treatment. Differences in the lower plant leaves essentially were not significant. The EC-water and ULV-oil formulations provided similar permethrin levels in the leaf interiors and comparable canopy penetrations; these formulations afforded permethrin leaf surface residues that disappeared at similar rates for the first 7 days after treatment.
Document Type: Research Article
Publication date: 1986-02-01
- 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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