Ecological Effects of an Insect Introduced for the Biological Control of Weeds-Reference-Cited by-同舟云学术

Ecological Effects of an Insect Introduced for the Biological Control of Weeds

Published:1997-08-22 Issue:5329 Volume:277 Page:1088-1090
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Louda S. M.¹²³⁴,Kendall D.¹²³⁴,Connor J.¹²³⁴,Simberloff D.¹²³⁴

Affiliation:

1. S. M. Louda, School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA.

2. D. Kendall, Fort Lewis College, Durango, CO 81301, USA.

3. J. Connor, Rocky Mountain National Park, Estes Park, CO 80512, USA.

4. D. Simberloff, Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996, USA.

Abstract

Few data exist on the environmental risks of biological control. The weevil Rhinocyllus conicus Froeh., introduced to control exotic thistles, has exhibited an increase in host range as well as continuing geographic expansion. Between 1992 and 1996, the frequency of weevil damage to native thistles consistently increased, reaching 16 to 77 percent of flowerheads per plant. Weevils significantly reduced the seed production of native thistle flowerheads. The density of native tephritid flies was significantly lower at high weevil density. Such ecological effects need to be better addressed in future evaluation and regulation of potential biological control agents.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference62 articles.

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