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Field Guide to the Biological Control of Weeds in British Columbia Powell, G.W.
2007
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Abstract: The biological control of weeds typically involves the local establishment of host-specific organisms from other parts of the world to give continuing control of weeds. Weeds reduce floral diversity and the capacity of land to support wildlife, livestock, trees, and recreational activities. The biological control of weeds has a long history as an economically sound and environmentally friendly method of controlling widespread introduced weeds on uncultivated land. In Canada the biological control of weeds began in British Columbia in 1952 with the release of the defoliating beetles Chrysolina quadrigemina and C. hyperici to control St. John's wort. Although initial results of that trial were disappointing, within 13 years of the release the beetle populations had increased sufficiently to control the weed in most areas of the province, eliminating the need for chemical control of this species. From these early beginnings, biological control of weeds has expanded to most provinces of Canada, and the program now uses more than 50 insects and pathogens on more than 20 different introduced weed species. This guide is designed to help resource managers in British Columbia identify weeds and select suitable biological control agents for those weeds. Biological control offers stable, long-term solutions to weed problems across the province.
 
Powell, G.W., Sturko, A.; Wikeem, B.M.; Harris, P.. 2007. Field Guide to the Biological Control of Weeds in British Columbia. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. Land Management Handbook (FLNRORD). LMH27
 
Topic: FLNRORD Research Program
Keywords: Vegetation, Management
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