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OBSERVATIONS ON THE BIOLOGY OF PARARGYRACTIS CONFUSALIS, AN AQUATIC PYRALID (LEPIDOPTERA: PYRALIDAE)

Published online by Cambridge University Press:  31 May 2012

Paul M. Tuskes
Paul M. Tuskes
Affiliation:
Department of Environmental Toxicology, University of California, Davis
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Abstract

In northern California Parargyractis confusalis has two to three generations per year, depending on climatic conditions. Adults lead a terrestrial life, though the female re-enters the water to oviposit. The eggs, larvae, and pupae exist underwater and have been collected to a depth of 4.3 m. Larvae occur in lakes and streams and are most abundant in areas where the water velocity is between 0.4 and 1.4 m/sec. Factors influencing the distribution and density of this species include water temperature, concentration of dissolved oxygen, substrate texture, and algal growth.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 5 , May 1977 , pp. 695 - 699
Copyright
Copyright © Entomological Society of Canada 1977

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