Toxicity and repellency of soybean and cottonseed oils to the sweetpotato whitefly and the cotton aphid on cotton in greenhouse studies
1988
Butler, G.D. Jr | Coudriet, D.L. | Henneberry, T.J.
Bioassays against the sweetpotato whitefly, Bemisia tabaci (Gennadius), and the cotton aphid, Aphis gossypii Glover, were conducted with emulsions of soybean and cottonseed oil in greenhouse studies. Adult sweetpotato whiteflies avoided a 5% soybean oil treatment to cotton, Gossypium hirsutum L., seedlings for as long as 7 days. Egg viability was reduced by 84% with a 10% cottonseed oil spray. Treatment of whitefly larvae with 2.5 and 5% soybean oil sprays resulted in a 90% or greater reduction in the number of larvae and pupae. Cotton aphid nymphal and adult populations were also reduced by foliar sprays of the oils. Transpiration loss was not significantly different from cotton seedlings sprayed with 2.5 or 5% soybean oil or water.
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