看着像柳树,网上说这样的要砍掉涂roundup
Cut it down in the fall and paint on (do not spray) extra strength round up
to the exposed cut areas and bark down to the soil level. You may also need
to treat again as new growth appears till gone-
Round up works in the roots- so eventually- it should kill all the roots-I
did learn this spring- that some (if not all) willows are highly suseptable
to herbicides. Poisons used to kill weeds in lawns can take down huge trees-
You may also need to treat the willows on the other side of the fence- or
looking at it another way- you may be poisoning the willows on the other
side of the fence when you treat yours- I hope your new neighbors won't mind
....