Response of Omnivorous Leafroller (Lepidoptera: Tortricidae) and Onion Thrips (Thysanoptera: Thripidae) to Low-Temperature Storage
Authors: Yokoyama, Victoria Y.; Miller, Gina T.
Source: Journal of Economic Entomology, Volume 93, Number 3, June 2000 , pp. 1031-1034(4)
Publisher: Entomological Society of America
Abstract:Eggs and first–fifth instars of omnivorous leafroller, Platynota stultana Walshingham, had a mean percentage survival to the adult stage of 60.7–95.2% for nonexposed immatures and 14.5–54.3% for immatures exposed to 1 wk at 0–1°C. Exposures of 2–5 wk resulted in 0–6.7% survival, and a 6-wk exposure resulted in <1% survival of all stages tested. A significant reduction in survival of all larval stages occurred between exposures of 0 and 1 wk and between 1 wk and 2–6 wk. Survival of eggs after exposures of 0 and 1 wk was significantly different than survival after exposures of 2–6 wk. The second instar was the stage least susceptible to low-temperature storage. Adults that were exposed to low temperature for 1 wk in the third through fifth instars laid a mean of 120–289 eggs per female, and the mean percentage viability of the eggs ranged from 56.2 to 71.4%. Mean percentage survival of adults and nymphs of onion thrips, Thrips tabaci Lindeman, was inversely related to the duration of exposure from 1 through 3–6 wk at 0–1 and 5°C and was lower at 0–1 (0.2–52.5%) than at 5°C (17.6–66.6%). Exposure to 0–1°C for 4 wk attained 91.2% control, which increased to 99.8% after 6 wk. Low-temperature storage has potential to control omnivorous leafroller in table grapes, Vitis vinifera L., and onion thrips in onions, Allium cepa L.
Document Type: Research Article
Publication date: 2000-06-01
- 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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