Nonlinear Optimization Analysis of Insecticide Mixtures for the Control of the Tobacco Bud worm (Lepidoptera: Noctuidae)
Authors: STONE, NICHOLAS D.; MAKELA, MERRY E.; PLAPP JR., FREDERICK W.
Source: Journal of Economic Entomology, Volume 81, Number 4, August 1988 , pp. 989-994(6)
Publisher: Entomological Society of America
Abstract:Optimal dose ratios of acephate and fenvalerate used in mixtures for the control of the tobacco bud worm, Heliothis virescens (F.), were calculated using a numerical analysis method for mortalities of 10-98%. No evidence of synergism was found across the five mixture ratios tested. Using the null hypothesis of independent action of the two compounds, a cost analysis showed that the optimal combination of the two chemicals depended on their relative costs and on the required kill. When high levels of kill (≥95%) were required, a mixture of the pesticides was more cost-effective than the use of individual chemicals alone. Furthermore, at cost ratios (fenvalerate to acephate) of 15:1 and below, relatively more acephate was needed in the economically optimal mixture as required kill increased. At ratios of 20:1 and above, relatively more fenvalerate was required with increasing required kill.
Document Type: Research article
Publication date: 1988-08-01
- 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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