Increased seed consumption by biological control weevil tempers positive CO<sub>2</sub> effect on invasive plant (<i>Centaurea diffusa</i>) fitness

نویسندگان

  • Justin L. Reeves
  • Dana M. Blumenthal
  • Julie A. Kray
  • Justin D. Derner
چکیده

a r t i c l e i n f o

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Biological Control Insect Use of Fertilized and Unfertilized Diffuse Knapweed in a Colorado Grassland

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Interactions and effects of multiple biological control insects on diffuse and spotted knapweed in the Front Range of Colorado

Abundances and interactions among biological control insects and their effects on target invasive plants were monitored within the flower heads and roots of diffuse knapweed, Centaurea diffusa, and in spotted knapweed, Centaurea stoebe, along the Colorado Front Range. Flower weevils, (Larinus species) and root-feeders (Cyphocleonus achates and Sphenoptera jugoslavica) were released on knapweed ...

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Successful biological control of diffuse knapweed, Centaurea diffusa, in British Columbia, Canada

The biological control program for diffuse knapweed, Centaurea diffusa Lamarck, a Eurasian plant that has invaded large areas of grasslands in western North America, has gone on for over 35 years. This program involved the release of 12 biological control agents of which four are numerous and widely distributed; two species of Tephritid flies, Urophora affinis and Urophora quadrifasciata, the r...

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Why Reduced Seed Production is Not Necessarily Translated Into Successful Biological Weed Control

Insects introduced as biological control agents of diffuse knapweed, Centaurea diffusa, primarily reduce seed production. Knapweed densities appear to be resilient to greatly reduced seed production. We have used measurements of seedling density and survival, and production of seeds by flowering diffuse knapweed plants to develop functions for a model of knapweed populations. These simulations ...

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تاریخ انتشار 2017