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1 April 2000 Effect of Temperature and Treatment Conditions on the Mortality of Epiphyas postvittana (Lepidoptera: Tortricidae) Exposed to Ethanol
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Abstract

Mortality responses were determined for 5th-instar lightbrown apple moth, Epiphyas postvittana (Walker), in the presence and absence of apples to immersion in ethanol solutions and exposure to ethanol vapor at a range of concentrations, treatment times, and temperatures. Ethanol may have caused an initial knock-down effect in E. postvittana larvae because there was a trend for larval mortality to reduce with increased periods between treatment and assessment time when immersed at 20°C in 30 or 50% ethanol solutions. Mortality for larvae immersed on apples in a range of ethanol concentrations was higher than for larvae in the absence of apples. Increasing treatment temperature from 20 to 45°C during ethanol immersion significantly increased larval mortality. During ethanol vapor exposure, longer treatment times were required to achieve 99% E. postvittana mortality for larvae on apples compared with those in the absence of apples.

PeterR. Dentener, Sonya E. Lewthwaite, Keren V. Bennett, John H. Maindonald, and Patrick G. Connolly "Effect of Temperature and Treatment Conditions on the Mortality of Epiphyas postvittana (Lepidoptera: Tortricidae) Exposed to Ethanol," Journal of Economic Entomology 93(2), 519-525, (1 April 2000). https://doi.org/10.1603/0022-0493-93.2.519
Received: 16 November 1998; Accepted: 1 September 1999; Published: 1 April 2000
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