Distribution of Citrus Bud Mite (Acari: Eriophyidae) within Lemon Trees

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The percentage of lemon axillary buds infested by citrus bud mite, Aceria Sheldoni (Ewing), varied with the age of twigs. Infestation declined sharply between buds on twigs that were mostly green and just beginning to develop bark (twig age 3) and buds on twigs where bark formation was more advanced and less than half of the surface was still green (twig age 4). The relative infestation of buds on young twigs (ages 0-3) varied between two groves that were studied, but, generally, green twigs that were angular in cross section rather than round (twig age 1) were as heavily infested or more so than any other twig age. New, elongating twigs (twig age 0) were infested almost as soon as they developed regardless of the time of year. Feeding damage increased as twigs aged, and accumulated feeding damage may have been largely responsible for the relatively low levels of infestation of buds from older twigs. The southern halves of the trees were significantly more infested than the northern halves. Within quadrants, the variation in infestation among buds on different twigs usually was greater than variation among buds on the same twig, suggesting a clumped distribution. The percentage of infested axillary buds was correlated with the percentage of fruit that was infested with bud mites under the calyx.

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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