[QUOTE=jawa;8204421]
If it hasn’t rained in your area since you sprayed round up, you might not see any wilting as the plant isn’t actively processing the poison.
There are several ground sterilizes that you can use, but they can migrate from the area they have been spread/sprayed. Some are so potent that they can damage /kill shrubs and trees.[/QUOTE]
Generally the plant takes up the moisture fairly quickly (and if it’s dry then very quickly). You’ll see signs of a die-off within 24 hours.
Using chemicals requires constant “head work.” You’ve got to calculate your application rate, watch the weather, pay attention to equipment, etc. You can’t just fill up tank, turn on a valve, and then dope off as you drive around and around. Folks who do that generally have unsatisfactory results.
G.