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CODLING MOTH (LASPEYRESIA POMONELLA (LEPIDOPTERA: OLETHREUTIDAE)): IMPROVING FIELD PERFORMANCE OF MASS-REARED MALES

Published online by Cambridge University Press:  31 May 2012

R. B. Hutt
R. B. Hutt
Affiliation:
Yakima Agricultural Research Laboratory, Federal Research, Science and Education Administration, USDA, Yakima, WA 98902
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Abstract

Eggs from a laboratory colony that had been in colonization for 34 generations at 25° ± 2 °C and 60% ± 10% R.H. were planted on thinning apples and held at temperatures ranging from 19.4 °C at night to 33.3 °C during the day. Humidity fluctuated freely with temperature changes. Then equal numbers of adults from the 1st generation of the fluctuating temperature colony and of adults from the 35th generation of the constant temperature colony were released. In a second series of tests, equal numbers of gamma irradiated (25 kr gamma irradiated) and unirradiated adults from the 2nd and 3rd generations of the fluctuating temperature colony and irradiated (25 kr) and unirradiated adults from the 36th and 37th generations of the constant temperature colony were released There were no statistical differences in recaptures of the 1st generation of the fluctuating temperature colony and the 35th generation of the constant temperature colony. Recaptures of the 2nd and 3rd generations of the fluctuating temperature colony were significantly greater than recaptures of the 36th and 37th generations of the constant temperature colony.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 6 , June 1979 , pp. 661 - 664
Copyright
Copyright © Entomological Society of Canada 1979

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