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MATING COMPETITIVENESS OF IRRADIATED MALES AND FEMALES OF THE INDIAN MEAL MOTH (LEPIDOPTERA: PYRALIDAE)

Published online by Cambridge University Press:  31 May 2012

John H. Brower
John H. Brower
Affiliation:
Stored-Product Insects Research and Development Laboratory, Agric. Res. Serv., USDA, Savannah, Georgia 31403
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Abstract

One-day-old adults of the Indian meal moth, Plodia interpunctella (Hübner), were irradiated (I) with either 35 krad (a partially sterilizing dose) or 50 krad (a sterilizing dose) and combined with untreated (U) adults at numbers of 1, 5, 10, 15, or 25 treated males or females per pair of untreated adults. At 25 males per pair, egg hatch was reduced to 4.8 and 22.2% at 35 and 50 krad, respectively. The use of the same number of I females reduced egg hatch to 0.8 and 9.4%, respectively. The calculated degree of competitiveness showed that both males and females were more competitive after treatment with 35 krad than after treatment with 50 krad and that treated females were more competitive (based on percentage egg hatch) at both doses than corresponding males. Irradiated females were fully competitive at most release ratios, but I males were not fully competitive even at the higher release ratios, although the decreases were not large enough to seriously affect their use for field control.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 1 , 01 January 1978 , pp. 37 - 42
Copyright
Copyright © Entomological Society of Canada 1978

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References

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