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Controlling Canada thistle patches resulting from wet summer

BROOKINGS, SD – Despite popular belief, Canada thistle populations have been declining in South Dakota over the past decade.

Based on some estimates, researchers have reduced densities by 200,000-300,000 acres, says Mike Moechnig, South Dakota State University (SDSU) Extension Weeds Specialist.

“This is approximately enough thistle to cover the entire surface of Davison county. Unfortunately, we still have about 1.5 million acres to manage,” Moechnig said.



This year could be different. Moechnig adds that wet conditions this summer may have stimulated thistle populations and prevented management. He encourages landowners to consider management this fall.

“Fall can be a great time to manage thistle populations as accidental drift may be less injurious to maturing crops, birds have completed their nesting, and time may be available prior to the crop harvest rush,” Moechnig said.



BROOKINGS, SD – Despite popular belief, Canada thistle populations have been declining in South Dakota over the past decade.

Based on some estimates, researchers have reduced densities by 200,000-300,000 acres, says Mike Moechnig, South Dakota State University (SDSU) Extension Weeds Specialist.

“This is approximately enough thistle to cover the entire surface of Davison county. Unfortunately, we still have about 1.5 million acres to manage,” Moechnig said.

This year could be different. Moechnig adds that wet conditions this summer may have stimulated thistle populations and prevented management. He encourages landowners to consider management this fall.

“Fall can be a great time to manage thistle populations as accidental drift may be less injurious to maturing crops, birds have completed their nesting, and time may be available prior to the crop harvest rush,” Moechnig said.

BROOKINGS, SD – Despite popular belief, Canada thistle populations have been declining in South Dakota over the past decade.

Based on some estimates, researchers have reduced densities by 200,000-300,000 acres, says Mike Moechnig, South Dakota State University (SDSU) Extension Weeds Specialist.

“This is approximately enough thistle to cover the entire surface of Davison county. Unfortunately, we still have about 1.5 million acres to manage,” Moechnig said.

This year could be different. Moechnig adds that wet conditions this summer may have stimulated thistle populations and prevented management. He encourages landowners to consider management this fall.

“Fall can be a great time to manage thistle populations as accidental drift may be less injurious to maturing crops, birds have completed their nesting, and time may be available prior to the crop harvest rush,” Moechnig said.


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