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• Specific Practices for Weeds Found on Site <br /> - Bull Thistle: Bi-annual <br /> Characteristics: <br /> Two year growth cycle.Grows as a rosette during first year then bolts up second year for seed head <br /> production. <br /> Bull thistle Rosette Bull Thistle Mature plant Bull Thistle Flower head <br /> Methods of Control: <br /> -Chemical:Spray Rosettes and mature plants prior to flower head production(early Spring) <br /> -Manual:Clip and bag flower heads if plants reach maturity then spray remainder of plant to prevent more flower <br /> head production <br /> Effective Herbicides(Application rates should be derived from product labels specific to weed species and tank mix, <br /> additional products may be used but should be a selective broad leaf herbicide to avoid damage to desirable <br /> grasses) <br /> 2,4-D Amine(2,4-dimethylamine) <br /> Telar XP(Chlorsulfron) <br /> Milestone(Amino Pyralid) <br /> GI hosate non-selective herbidide may cause damage to desirable vegetation) <br /> Figurel.Specific practices for the control of Bull Thistle. <br /> 4 a61 3ftiall 6�s <br />