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Re: [RC] [RC] Roundup Weed Control in the Pasture - Ed & Wendy Hauser

"...knapweed spread..."
 
Knapweed, of which there are 3 varieties, is in the thistle family.  They came over from Asia about 1900.  In some areas of the west they can take over most non-irrigated areas very quickly.  The spotted knapweed is the most prevalent here in the bitterroot.  They are spread by seeds. They live 4-5 years.  Seeds are viable in the soil for up to 6 years.  They secrete a natural herbal substance (otherwise known as a chemical) that stops other plants from growing near them. 
 
Mowing does no good.  Chemical control works well.  If the area is suitable picloram (Tordon 22K) will control for 3 or more years.  Other shorter acting chemicals work also and are best in areas near water.  Pulling works, if you only have a few plants. There are a weevil and some flies that control it.  The U of Montana Ag. station at Corvallis is mass producing the bugs.
 
Ed
Ed & Wendy Hauser
2994 Mittower Road
Victor, MT 59875
 
ranch@xxxxxxxxxxx
406.642.6490

Replies
Re: [RC] [RC] Roundup Weed Control in the Pasture, Michelle Fink
Re: [RC] [RC] Roundup Weed Control in the Pasture, Truman Prevatt