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Northern Prairie Wildlife Research Center

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Control of Invasive Exotic Plants in the Great Plains

Sample Entry

Scientific Name:  Carduus nutans
Common Name:      Musk thistle, Nodding thistle
Family:           Asteraceae
Location:         NE MN MO KS SD ND VA ON CO MD MT
Control:          Biocontrol Chemical Grazing

Habitat:          Musk thistle is found in waste ground, old fields,
                  pasture, and along roads and railroads, preferring
                  well-drained and fertile soils, but tolerant of   
                  many conditions.                                  

Detail:           BIOCONTROL                                        
                  Cartwright, Bob and Loke T. Kok (1985).  Growth   
                  responses of musk and plumeless thistles (Carduus 
                  nutans and C. acanthoides) to damage by           
                  Trichosirocalus horridus                          
                  (Coleoptera:Curculionidae).  Weed Science         
                  Location:  Pastures in Montgomery and Giles       
                  Counties, Virginia.                               
                  Objective:  To determine the response of musk and 
                  plumeless thistle to the thistle rosette weevil.  
                  Summary:  In 1980, two sites were selected, each  
                  heavily infested with musk thistle, and each a    
                  site at which the thistle rosette weevil had      
                  become established.  Fifty weevil-infested and 50 
                  non-infested rosettes were sampled from each site.
                  In 1981, 100 each of the infested and non-infested
                  musk thistle plants were sampled.  In 1982,       
                  rosettes between 10-15 cm in diameter (small) and 

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