Effect of Selected Insecticide Classes on Cotton Yield and Maturity

Gary L. Lentz


 
ABSTRACT

Insecticides belonging to three classes (carbamate, organophosphate, and synthetic pyrethroid) were evaluated for three years in scheduled applications for their effect on bollworm damage, maturity, percent lint at first harvest and yield. In 1984, firstharvest lint yields from Pydrin-treated plots were significantly greater than from EPN+Methyl Parathionor Bolstar-treated plots. None of the treatments produced significantly more total cotton than the untreated check. In 1985, lint yields from plots treated with Cygon+Cymbush were significantly greater than those from Bolstar-treated and the untreated check plots. In 1986, first harvest and total lint yields from treated plots were significantly different from those from the untreated check. Larvin-treated plots produced significantly more cotton than those treated with Bolster and Pydrin. In the 3-year study when 8 applications were made each year, comparable delays in maturity were noted with EPN+Methyl Parathion and Bolster.



Reprinted from 1988 Proceedings: Beltwide Cotton Production Research Conferences pg. 321
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998