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ON THE OCCURRENCE AND BIOLOGY OF NEPYTIA FREEMANI (LEPIDOPTERA: GEOMETRIDAE) IN UTAH

Published online by Cambridge University Press:  31 May 2012

William H. Klein  and
Maxine W. Minnoch
William H. Klein
Affiliation:
U.S. Forest Service, Ogden, Utah
Maxine W. Minnoch
Affiliation:
U.S. Forest Service, Ogden, Utah
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Abstract

Nepytia freemani Munroe reached outbreak proportions in one area in north central Utah in 1965 and subsided in early 1967. The looper has a 1-year life cycle and overwinters in the egg stage. Larvae issue from eggs in mid-May, feed during the summer months, and begin pupation in late July. Adults appear in August and females lay clusters of small oval eggs on both sides of the needle. White fir is the preferred host but Douglas-fir is also fed on. Even though defoliation was extremely heavy, topkill was the only permanent damage. Starved larvae fed on ground vegetation in the understory. Parasitism was heavy but its overall effectiveness in causing the sudden population decline is unknown.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 1 , January 1971 , pp. 119 - 124
Copyright
Copyright © Entomological Society of Canada 1971

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References

Munroe, E. 1963. A new species of Nepytia (Lepidoptera: Geometridae), of economic importance to Douglas-fir in British Columbia. Can. Ent. 95: 407–413.CrossRefGoogle Scholar
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