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Establishment, Dispersal, and Influence of Ceutorhynchus litura on Canada Thistle (Cirsium arvense) in the Gallatin Valley of Montana

Published online by Cambridge University Press:  12 June 2017

Norman E. Rees
Norman E. Rees*
Affiliation:
USDA-ARS, Rangeland Insect Lab., Biol. Control of Weeds Res. Unit, Montana State Univ., Bozeman, MT 59717
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Abstract

Ceutorhynchus litura dispersed 9 km in 15 yr from its point of release in 1972 with incident of infestation of Canada thistle plants at one study site reaching 92% in 1987. Plants generally survived larval feeding in the spring, but holes created by departing larvae provided entrances for arthropods, nematodes, and diseases. Subsequent mortality rates were high for belowground Canada thistle shoots. However, the number of new shoots from underground roots the following spring usually offset the mortality that had been indirectly caused by C. litura.

Keywords

Canada thistle, Cirsium arvense (L.) Scop. ♯ CIRARBiological control
Type
Special Topics
Information
Weed Science , Volume 38 , Issue 2 , March 1990 , pp. 198 - 200
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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