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The successful importation, mass release and establishment of exotic natural enemies on the Comstock mealybug, Pseudococcus comstocki (Kuwana), in the residential area of Porterville, CA, within the San Joaquin Valley have resulted in the biological control of this mealybug. Other infested areas in the Valley receiving parasite introductions followed the same pattern. The natural enemy complex consists of 3 imported parasites, Pseudaphycus malinus Gahan, Allotropa burrelli Muesebeck, A. convexifrons Muesebeck, and Zarhopalus corvinus (Girault), an indigenous parasite of P. maritimus (Ehrhorn), plus native predators, mainly Leucopis ocellaris Malloch and Chrysopa spp. A. convexifrons, the last to be established, is now the dominant parasite. The population density of P. comstocki was reduced by a maximum of 68% in East Porterville from 1972 through 1976, 71% in Central Porterville, and 73% in West Porterville from 1974 through 1976 as a result of the newly established natural enemy complex. The regulation of the mealybug by its natural enemy complex at these lower population levels was below economic importance in residential areas which contributed to the termination of the California Department of Food and Agriculture's eradication program.
Document Type: Research Article
Publication date: February 1, 1981
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.