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Effect of Trialeurodes vaporariorum (Homoptera: Aleyrodidae) on Yield of Fresh Market Tomatoes

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Abstract:

Effect of the feeding of immature greenhouse whitefly, Trialeurodes vaporariorum (Westwood), and sooty mold contamination on tomato production was determined using small field plots. Total and grade-A fruit weights harvested were correlated negl\tively with cumulative immature greenhouse whitefly days (=pest-days). Effects of T. vaporariorum feeding on tomato yield were inlluenced by environmental factors. Percentages of fruit contaminated with sooty mold were correlated positively with cumulative immature greenhouse whitefly days. Cumulative immature greenhouse whitelly days were correlated positively with peak immature whitefly densities during the growth cycle of the plant. Results suggest that tomatoes grown in Hawaii may incur a 5% yield loss in grade-A fruit at about greenhouse whitefly levels as low as 70 cumulative greenhouse whitefly days per cm2 tomato leaflet (=a peak density of 0.7 immature greenhouse whitefly per cm2 tomato leaflet per day) due primarily to the consumption of plant assimilates by T. vaporariorum. Compared with direct greenhouse whitefly feeding, contamination of fruit with sooty mold was less important with respect to reducing overall crop yields. A 5% reduction in grade-A fruit due to sooty mold contamination was estimated at ""300 cumulative greenhouse whitefly days per cm2 tomato leallet (=a peak density of 8.3 immature greenhouse whitefly per cm2 tomato leaflet).

Document Type: Research Article

Publication date: December 1, 1992

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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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