by Science and Education Administration, U.S. Dept. of Agriculture in New Orleans .
Written in English
Includes bibliographical references.
|Statement||edited by Kenneth E. Frick.|
|Contributions||Frick, Kenneth Eugene, 1917-|
|The Physical Object|
|Pagination||vii, 50 p. :|
|Number of Pages||50|
Work in recent decades on the possibilities of the biological control of important weedy thistles of the genera Carduus, Cirsium and Silybum is reviewed. Almost all these weeds are European or Eurasian in origin and many have been introduced into North America. Surveys of phytophagous insects associated with the thistles in their native areas began in ; many species have been found to be Cited by: Successful or substantial biological control of musk thistle (Carduus nutans L.) has been noted in much of the United States (Goeden and Ricker, ;Puttler et al., ;Batra, ;Littlefield. “Thistle” is an old English name for a large variety of weedy, prickly plants that grow throughout the world. The most notable characteristics of thistles are the prickly stems and leaves and the bracts around the flower head. While many different plants have “thistle” in their common name, only certain plant species fit the taxonomic requirements of being considered “true thistles.”Cited by: 2. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.
Weed Sci. 24, Dunn, P. H. History of the biological control of musk thistle in North America and studies with the flea beetle Psylliodes chalcomera. In "Biological Control of Thistles in the Genus Carduus in the United States" (K. E. Frick. Ed.), pp. USDA/SEA Stoneville, Mississippi. Fernald, M. L. L Biological Control of Musk Thistle in Texas John A. Jackman, Paul Boldt, J.W. Stewart and Thomas W. Fuchs* The musk thistle, a member of the Carduus nu- tans L. (Compositae) complex, is a noxious week in pastures, rangelands, croplands, along state high-. History of Biological Control Efforts in the Eastern United States. Area of Origin of Weed. Cirsium vulgare is a native of Europe, western Asia, and North Africa. Areas Surveyed for Natural Enemies. Bull thistle was not considered a priority species when the thistle biological control program started in . There has been little work done to evaluate the effectiveness of biological control agents for Canada thistle in the eastern United States. Using Canada thistle root cuttings transplanted to caged field plots, Ang et al. () showed that feeding by C. rubiginosa significantly reduced biomass and survival of Canada thistle.
biennial thistles reproduce only from seed, the key to a successful management pro-gram is to control the plants before flowering. M ost thistles in the western United States are native species that generally go unnoticed and likely never will cause significant losses as weeds. However, thistle . In: Van Driesche, R., et al., , Biological Control of Invasive Plants in the Eastern United States, USDA Forest Service Publication FHTET, p. Pest Status of Weed. Musk thistle, Carduus nutans L., is an invasive weed that has become widespread in the contiguous states of the United States. It is a highly competitive weed of Eurasian origin that has replaced much of the native. Biological control of Canada thistle. Since the ’s, a Canada thistle gall-fly (Urophora cardui) and a stem-mining weevil (Hadroplontus litura) have been used to control Canada thistle in North America. However, these two insects have been very limited in field settings and are ineffective overall. Recent research now allows us to utilize. Biological control of musk thistle. June 8, PM. Blog Post. While searching for Palmer amaranth in a pollinator habitat planting I encountered a few musk thistles. As I always do when I see this weed, I examined flower heads for the presence of the musk thistle weevil. This insect was imported to North America as a biocontrol agent for.