Effect of Insecticide Treatments to Reduce Infestation by Citrus Thrips (Thysanoptera: Thripidae) on Growth of Nonbearing Citrus

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We assessed the value of chemical control used to protect young orange trees from foliar damage caused by citrus thrips, Scirtothrips citri (Moulton). As many as 17 insecticide applications to individual navel orange, Citros sinensis L. Osbeck, trees during the first 3 yr after planting failed to result in an increase in tree size during years 2 through 5 or yield during years 3 through 5. Similarly, 19 applications to O.44-ha blocks of 'Valencia' oranges during the first 3 yr after planting failed to result in increases in trunk circumference during years 1 through 4 or yield in the first 2 yr of fruit production. In contrast to the practice of many growers, we suggest that intensive control of citrus thrips populations on young, non bearing trees is not warranted and could lead to increased problems with citrus thrips resistance to the limited number of available and effective insecticides.

Document Type: Research Article

Publication date: February 1, 1998

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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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