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• Roundup @ 1/2 gallon/acre in the <br />spring at the bloom stage. <br />• Banvel can be used if treatments are <br />at least 2.5 the height from a tree <br />trunk and the daily high temp. is less <br />than 85F for the next three days. <br />Also the water table should be more <br />than 10 feet beneath the surface. <br />Apply @ 1pUacre at the same timing <br />az the 2,4-D. <br />• Tordon 22K is the most consistant <br />on musk thistle @ 1/lpt/acre in the <br />fall, but should be used only if <br />treatments are at least 2.5 the height <br />from a tree trunk and the water table <br />is more than 10 feet beneath the <br />surface. <br />• GLrtail (a premix of clopyralid & <br />2,4-D amine) @ 2gts/acre. <br />• Transline/Stinger @ 2J3pt/acre for <br />most selective control around <br />desirable trees. <br />Because of their shorter life cycle, musk <br />thistle plants can be effectively treated with <br />herbicides. All herbicide treatments should <br />be applied at the rosette stage of the plant. <br />Generally, herbicide applications would be in <br />early spring or fall. Ahvays read and follow <br />the label! <br />Proper calibration with a handsprayer / <br />handgun can be done by <br />1. Filling the sprayer with water. <br />2. With a watch timing how long it <br />takes to uniformly spray an area <br />18.Sft x 18.Sft. <br />3. Using the recorded time, spray <br />again into a mcazuring device. <br />The amount collected in ounces equals <br />the gallons per acre. Add the above <br />amounts of herbicide to this much water for <br />your handspraying task. <br />Example: If Rancher Smith collects back <br />into his sprayer 100 oz after spraying the <br />18.5x18.5 spot, then 100oz=100gaUacre. For <br />every 100oz. of spray mix he needs to add 1 <br />tablespoon of 2,4-D to his tank (2 # acre <br />rate in his backpack) adding the remainder <br />in water. 2 quarts per 100ga1. in large <br />sprayers. <br />Other products arc in the development stage <br />at this time. <br />INTEGRATED WEED <br />MANAGEMENT <br />of MUSK THISTLE <br />for large lot owners, <br />farmers, and ranchers. <br />~ Ypw \ <br />i <br />'s <br />~~.,D~r. <br />~ FLOWER / <br />RosF lr6 <br />Douglas Co. Coop. Extension, ~• <br />107 Wilcox, Suite 200 <br />Castle Rock, CO 80104 <br />688-3096 <br />Jce Julian -Director <br />in collaboration with the <br />Douglas Co. Weed Division <br />5 Industrial Way <br />Castle Rock, CO 80104 <br />660-7476 <br />Jottathatt Rife -Weed Inspector <br />MUSK 1Ni511E~ <br />