Transmission of Tomato Yellow Leaf Curl Geminivirus to Imidacloprid Treated Tomato Plants by the Whitefly Bemisia tabaci (Homoptera: Aleyrodidae)

Authors: Rubinstein, Galina; Morin, Shai; Czosnek, Henryk

Source: Journal of Economic Entomology, Volume 92, Number 3, June 1999 , pp. 658-662(5)

Publisher: Entomological Society of America

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The ability of whiteflies [Bemisia tabaci (Gennadius), B biotype] to transmit tomato yellow leaf curl geminivirus (TYLCV, Israeli isolate) to imidacloprid-treated and untreated tomato plants was investigated. Viruliferous whiteflies were caged with treated tomato plants held in a nethouse. Insect mortality and tomato infection was assessed during the summer and the winter seasons, after insecticide application. In summer, insects that were given access to tomato plants 3 and 11 d after insecticide treatment died within 80 min. This period increased to 150 min 18 d after treatment. The insecticide lost its potency 25 d after application. In winter the lethal effect of the insecticide lasted longer than in summer. In summer as well as in winter, 70% of the tomato plants caged with viruliferous whiteflies 3 d after insecticide treatment became infected. These figures increased to 80% 11 d after treatment and to nearly 100% 18 d after treatment. Insecticide-treated plants were as prone to infection as nontreated plants. Approximately 48 min of access to a treated tomato plant was sufficient for a single viruliferous insect to inoculate the virus with an efficiency rate of 20% or more. Transmission efficiency was similar to that achieved on nontreated plants. Therefore, viruliferous insects had enough time to inoculate TYLCV to imidacloprid-treated plants before they died.

Keywords: confidor; geminivirus; imidacloprid; insecticide; tomato; whitefly

Document Type: Research Article

Publication date: June 1, 1999

More about this publication?
  • 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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