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Urophora affinis and U quadrifasciata released and monitored by USDA, APHIS, PPQ as biological control agents of spotted and diffuse knapweed



Urophora affinis and U quadrifasciata released and monitored by USDA, APHIS, PPQ as biological control agents of spotted and diffuse knapweed



Great Lakes Entomologist 30(3): 105-113, Fall



USDA, APHIS, PPQ has distributed the seedhead gall flies Urophora affinis and U. quadrifasciata (Diptera: Tephritidae) as classical biological agents of the introduced weeds spotted and diffuse knapweed (Centaurea maculosa and C. diffusa, respectively) (Asteraceae) in the United States. From 1987 to 1996, Urophora spp. have been released in 97 counties in 14 midwestern and western states. Established populations of U. affinis and U. quadrifasciata are confirmed in 85 and 95 counties, respectively, among all 14 states. These include the first reports of successful establishment of Urophora spp. in Arizona (two counties), Colorado (eight counties), Michigan (one county), Minnesota (six counties), Nebraska (four counties), Nevada (two counties), North Dakota (one county), South Dakota (four counties), Utah (three counties), and Wisconsin (two counties). The first confirmed establishment of U. quadrifasciata in Indiana and Michigan is also reported.

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Accession: 034144580

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Related references

Distribution of Urophora affinis and U quadrifasciata for biological control of spotted knapweed and diffuse knapweed in Michigan. Great Lakes Entomologist 34(1): 31-42, Spring-Summer 2001( ), 2002

Establishment of urophora affinis and urophora quadrifasciata diptera tephritidae in canada for the biological control of diffuse and spotted knapweed. Zeitschrift fuer Angewandte Entomologie 89(5): 504-514, 1980

Establishment of Urophora affinis Frfld. and Urophora quadrifasciata (Meig.) (Diptera: Tephritidae) in Canada for the biological control of diffuse and spotted knapweed. Zeitschrift fur angewandte Entomologie = Journal of applied entomology 89(5): 504-514, 1980

Biological control of diffuse and spotted knapweed by Urophora affinis and U. quadrifasciata in British Columbia. Proceedings of the First International Rangeland Congress, Denver, Colorado, USA 1978: 664-666, 1978

Distribution of Urophora affinis and U-quadrifasciata (Diptera : Tephritidae) for biological control of spotted knapweed (Centaurea maculosa) and diffuse knapweed (Centaurea diffusa) in Michigan. Great Lakes Entomologist 34(1): 31-42, 2001

Establishment of Urophora affinis Frfld. and U. quadrifasciata (Meig.) (Diptera: Tephritidae) in Canada for the biological control of diffuse and spotted knapweed. Zeitschrift Fuer Angewandte Entomologie: 895: 504-514, 1980

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