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.
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1 April 2000
Effect of Temperature and Treatment Conditions on the Mortality of Epiphyas postvittana (Lepidoptera: Tortricidae) Exposed to Ethanol
PeterR. Dentener,
Sonya E. Lewthwaite,
Keren V. Bennett,
John H. Maindonald,
Patrick G. Connolly
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Journal of Economic Entomology
Vol. 93 • No. 2
April 2000
Vol. 93 • No. 2
April 2000
apple
Epiphyas postvittana
ethanol
immersion
temperature
vapor