Responses of Codling Moth (Lepidoptera: Tortricidae) Life Stages to High Carbon Dioxide or Low Oxygen Atmospheres
Authors: SODERSTROM, EDWIN L.; BRANDL, DAVID G.; MACKEY, ANDBRUCE
Source: Journal of Economic Entomology, Volume 83, Number 2, April 1990 , pp. 472-475(4)
Publisher: Entomological Society of America
Abstract:Eggs, mature larvae, diapausing larvae, pupae, and adult stages of codling moth, Cydia pomonella (L.), were exposed to two controlled atmospheres at 25°Cand either 60 or 95%RH. The atmospheres used were either a simulated combustion atmosphere (0.5% 0., 10% CO., balance nitrogen) such as that produced by an exothermic generator fueled with methane or propane, or a 60% CO. in air atmosphere. Mortality data were converted to logits and multiple regression analyses of logit versus time were performed for each life stage. LT,,.'s were estimated from the regression models. The trend from least to most tolerant stage was: eggs, adults < pupae < mature larvae < diapausing larvae. Atmospheres at 60% RH killed all life stages except eggs more quickly than those at 95% RH; for eggs, the difference was not significant. Except for pupae, the carbon dioxide atmospheres caused faster mortalities than the low oxygen atmospheres. LT's for eggs were <2 d, while LT's for larvae ranged from 7 to 19 d. Diapausing larvae were killed with 60% CO. atmosphere in 13-24 d, whereas with the low oxygen atmosphere approximately 70% mortality was attained after 18 d at 60% RH, and 60% mortality was attained after 42 d at 95% RH.
Document Type: Research article
Publication date: 1990-04-01
- 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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