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Integrated Weed Management recommendations <br />selected Establishment of grasses <br />can be an effective cultural control <br />of diffuse knapweed. <br />your local Natural Resources <br />F <br />.� Conservation - • mix <br />pastures and prevent bare spots <br />• <br />• by overgrazing. • • • <br />prime is habitat • weed Integrated Weed <br />BIOLOGICAL Management.- <br />The . • - • • Diffuse knapweed <br />• the root weevil - • is best controlled <br />provide fair to ' • • • • • in the rosette when - • • • .• stage. It is <br />�.� <br />other. ExQect to wait at least 3 to imperative to <br />4) �' for the insects to establish and achieve prevent-seed <br />• • ' • • • production. <br />``- <br />large infestations. • •' Donotallow <br />contact - Department of diffuse knapweed <br />V ` <br />Agriculture, 970-464-7916. flowers to appear. <br />ti Management <br />must be persistent <br />in order to <br />r Kr: deplete the seed <br />� �, ' �' � -, 3: ,.; • • bank in the soi /. <br />the h. <br />root below the soil or <br />will kill diffuse knapweed. ��iFS. • • • • - Mowing • <br />knapweed plants are at full-bloom. <br />ct Be sure to properly dispose of the flowering <br />mature • become <br />ct plant has been cut down. <br />HERBICIDES : The following are recommendations for herbicides that can be applied to range and <br />pasturelands. Always read, understand, and follow the label directions. Rates are approximate and <br />based on equipment with an output of 30 gal /acre. Please read label for exact rates. The herbicide tam" <br />label is the LAW! <br />(4 -,1 l <br />t <br />M&7 <br />&7 <br />COL ADO <br />DEPARTMENT OF <br />eGRICULTM <br />Weevil photo©J.Johnson,Univ Idaho,bugwood.org.All other photos © Kelly Uhing. <br />HERBICIDE RATE APPLICATION TIMING <br />Aminopyralid 5 -7 ounces /acre Spring at rosette to early bolt stage and /or in <br />(Milestone) or the fall to rosettes. <br />1 teaspsoon /gal water Add non -ionic surfactant �n 0.32oz /gal water <br />or 1 qt/ 100 gal water. <br />2,4 -D Amine 1 qt. /acre Apply to spring /fall rosettes - before flowering <br />or stalk lengthens. DO NOT apply when outside <br />1 oz /gal water temperatures will exceed 85 degrees. <br />Add non -ionic surfactant �a 0.32oz /gal water <br />or lqt /100 gal water. <br />Clopyralid + Triclopyr 1.5 -2 pints /acre Apply from rosette to early bolt stage of growth <br />(Redeem R &P) or and /or in the fall to rosettes. <br />0.75 oz /gal water Add non -ionic surfactant �a 0.32oz /gal water <br />or lqt /100 al water. <br />Picloram Jordon <br />22K <br />1 -2 pts /acre <br />Apply to spring rosettes through mid -bolt and <br />*this is a Restricted Use <br />or <br />in fall to rosettes. DO NOT apply near trees/ <br />Pesticide *) <br />0.75 oz /gal water <br />shrubs /high water table. <br />