Are you constantly fighting a losing battle against harsh brush and weeds. Ortho Max poison ivy and tough brush killer concentrate kills over 60 types of tough brush and weeds. This product is specially formulated to kill the toughest brush weeds, including poison ivy, poison oak, kudzu and wild blackberries. Ortho Max poison ivy and tough brush killer concentrate is easy to apply with an Ortho dial 'N Spray hose end sprayer or any other tank sprayer and it is rainproof 2 hr after application.