Effects of Low Temperature on Egg and Larval Stages of the Lesser Appleworm (Lepidoptera: Tortricidae)

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Lesser appleworm, Grapholita prunivora (Walsh), eggs were subjected to cold storage conditions at 2.0°C ± 0.2°C for 0–90 d. The most tolerant embryonic stage was the blackhead stage (96–120-h-old eggs) with an LT90 of 25 d. The four instars of lesser appleworm were subjected to cold storage conditions at 2.0°C ± 0.2°C for 0–280 d. The fourth instar was the most tolerant to cold storage, with an LT90 of 71.5 d. Exposure to low temperatures such as those commonly used for fruit storage shows promise as an alternative to fumigation for lesser appleworm eggs and larvae on apples and pears after harvest.

Keywords: Grapholita prunivora; Tortricidae; apple; cold; lesser appleworm

Document Type: Research Article

Publication date: June 1, 2004

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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