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Crowding Effects on Plum Curculios1 Reared at Several Densities on Two Sizes of Green Apples2

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Abstract:

Several densities of newly emerged paired adult Conotrachelus nenuphar (Herbst) were placed on green thinning apples which weighed approximately 12 or 20 g. Eggs laid per female decreased at the highest density, but total oviposition was greater in a given weight of the smaller apples. Also, larval emergence decreased at the highest density, but larval survival was equal for the 2 sizes of apples. Also, more and larger larvae were produced from a given weight of the smaller apples; the possible causes of the differences are discussed and several improvements in the rearing technique are reported.

Document Type: Research Article

Publication date: June 1, 1968

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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