Herbivore Effects on Fresh and Processing Tomato Productivity Before Harvest

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Effects of various insecticide treatment programs on tomato yield were evaluated from 1982 through 1986.Compared with results of fenvalerate applications, significant reductions in total yield and total fruit number were associated with applications of oxamyl. Significant negative regressions were obtained between percentage infestation by Lepidoptera and total fruit number, total yield, and mean fruit size. Indeterminate fresh-market cultivars produced larger fruit as the total number of fruit decreased. Determinate cultivars did not increase fruit size as total number of fruit decreased. These reductions may result from early season herbivore effects such as fruit abortion. Implications of economic injury levels for direct pests are discussed.

Document Type: Research Article

Publication date: June 1, 1989

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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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