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thistle
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<blockquote data-quote="Texan" data-source="post: 35365" data-attributes="member: 416"><p>If you choose to spot spray thistles, I <em>highly</em> recommend the Grazon over 2,4-D or glyphosate. Those will work equally as well on the thistle that you spray. The difference is that the picloram in the Grazon will have residual soil activity that will kill any that germinate around the mature plant that you spray, until that picloram moves on out of the soil. Not good to kill one thistle and have two germinate right beside it.</p><p></p><p>Whatever you use, do like others have suggested and get rid of the seed heads. A thistle has a lot of energy in the stalk and will continue to mature a seed head long after you cut it or dig it.</p><p></p><p>At any rate, plan on doing it for two or three years to get complete control.</p></blockquote><p></p>
[QUOTE="Texan, post: 35365, member: 416"] If you choose to spot spray thistles, I [i]highly[/i] recommend the Grazon over 2,4-D or glyphosate. Those will work equally as well on the thistle that you spray. The difference is that the picloram in the Grazon will have residual soil activity that will kill any that germinate around the mature plant that you spray, until that picloram moves on out of the soil. Not good to kill one thistle and have two germinate right beside it. Whatever you use, do like others have suggested and get rid of the seed heads. A thistle has a lot of energy in the stalk and will continue to mature a seed head long after you cut it or dig it. At any rate, plan on doing it for two or three years to get complete control. [/QUOTE]
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