Pesticides for trailing blackberries and Rhino thistle

[Jacob J.]

Howdy Folks-

I got a question for the landscapers, horticulturists, and/or the arborists here;

I need a good application for winter time work on Rhino thistle, Star thistle, Trailing Blackberries, and Mountain blackberries. I live in Western Oregon and the temps here right now are averaging 30-38 during the day in the winter with moderate precip. Anyone have some suggestions?? thanks!

 

[Jacob J.]

Oops, forgot to mention most of this work is in young reprod about 8-10 years old and I don't want to scorch any conifers of course.

 

[bwalker]

Roundup or crossbow should work fine.

 

[treeclimber165]

That's an herbicide. Even though they sound like weeds, he asked about pesticides.

Jacob, what type of insect problem do you have?