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Southeast Ohio | I did an NRCS project to control and invasive, Tree of Heaven. Used a basal spray application of 25% Trichlopar, 1% Imazepyr, and 74% basal oil. Treated 50 ac of invasives. knocked em dead. Just spray the bottom 18" from the ground up.
I've heard that 25% Triclopar and 75% diesel works also.
1" girdling cut with straight glyphos applied to the cut I've heard works also, but I've not tried it.
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Chemical girdling
