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Page 3 of 2 3 <br />Appendix I <br />first treatment. With either treatment, monitor infestations. Retreat with i quart/'A of Tordon when shout <br />control is less than 75 percent. <br />Tordon may he tank-mixed with 2.4-D to provide adequate control. Apply I to 1.5 pints of Tordon with I <br />to 1.5 guarts.'A of 2.4-D in spring w}ten Icafy spurge flowers. Wlicn this application is made for three to <br />five consecutive years, leafy spurge shoot control is generally 80 to 90 percent and cattle will feed in the <br />area again. <br />BanvelrVanquislti''Clarity also is effective against leafy spurge. Apply 2 quarts: .A in spring for three <br />consecutive years. Often control is not very good in the first year hill improves over the next two cars..At <br />that time, a maintenance schedule that uses low rates of Banvel, Vanquish Clarity -• 2.4-D 14 to R ounces + <br />0-5 to I guart/A ), or Tordon + 2.4-D ( I pint + I quart, A) as needed can be used to keep infestations under <br />control. Note: Avoid using soil-active herbicides such as Tordon or Vanquish/Clarity near windbreak <br />plants or other desirable woody vegetation. Plant injury or death call occur. Also, do not allow any <br />herbicide to dnft unto desirable woolly vegetation for the same reasons. <br />Recently, Plateau (intazapic) was registered to control Icafy spurge in noncrop areas. It can he used safely <br />around tree: but ntay temporarily. injure <ooksc,,.sun pcreiiiial grasses. Apply Plateau at R or 12 fl. oz A in <br />fall, lolluwed by 4 ti. oz,A the following spring at flowering. Add a methylated seed oil at 2 pints ,j\ to the <br />spray solution. .A liquid nitrogen fertilizer solution may he added to the spray mixture to increase weed <br />control, but it may increase cool-season perennial Bras, injury. <br />Canada thistle <br />44 <br />kii, <br />A' v. fsM-f?c11` ?..."t <br />C <br /> *w" <br /> ?-. ?\ •. <br />IC4 <br /> <br /> , r??t ? <br /> ti R? " ..p /Y +<?+? <br />1 ? b? ? <br />+ . <br /> ? <br />s.. •'t a• 5 ? ?5 !? ? „Y,,, u?'.t rtL'. t ?,-. l? ? ?t ? ? , ?'? <br /> <br /> 4, <br /> <br />i?f•• a <br />6ti .?k.. ? 1 <br />a?t ??? S?r?/,M' f ?4 ill?> •?, ?'? ? ,. ??, re <br />? ^ <br />- <br /> <br /> <br /> <br />Management <br />The key principle to Canada thistle control is to stress the plant and force it to use stored rout nutrients. <br />Canada thistle can recover from almost any stress, including control attempts, because of rout nutrient