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FIRST REPORT OF THE ESTABLISHMENT OF AGAPETA ZOEGANA L. (LEPIDOPTERA: COCHYLIDAE) ON SPOTTED KNAPWEED, CENTAUREA MACULOSA LAMARCK, IN THE UNITED STATES1

Published online by Cambridge University Press:  31 May 2012

J.M. Story ,
K.W. Boggs  and
W.R. Good
J.M. Story
Affiliation:
Montana Agricultural Experiment Station, Western Agricultural Research Center, Corvallis, Montana, USA 59828
K.W. Boggs
Affiliation:
Montana Agricultural Experiment Station, Western Agricultural Research Center, Corvallis, Montana, USA 59828
W.R. Good
Affiliation:
Montana Agricultural Experiment Station, Western Agricultural Research Center, Corvallis, Montana, USA 59828
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Extract

Agapeta zoegana L. (Lepidoptera: Cochylidae) is a Eurasian root-mining moth introduced into North America for control of spotted knapweed, Centaurea maculosa Larnarck. The biology and host specificity of the moth were described by Müller et al. (1988, 1989). Early-instar larvae mine the epidermal tissues of the root crown. Older larvae mine the root cortex and endodermis and cause considerable damage, especially to small plants or when several larvae infest a single large plant. Larvae can migrate below ground to a new host plant if the initial knapweed plant has been destroyed. The moth overwinters as a larva in the root and emerges as an adult in June through August. Several generations per year may occur.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 2 , April 1991 , pp. 411 - 412
Copyright
Copyright © Entomological Society of Canada 1991

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References

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