Todd great news. The diquat does nto have a cumulative effect. It is a contact herbicide. So if you have less watermeal it is from past efforts not just diquat in the water. Keep in mind with WM you have some in different stages of development and in the watercolumn as well. This is the tough part of killing with diquat.
Do you still have the other submersed grasses? Hopefully so since you wanted to save. If not yes fyi one 8 ozs whitecap will do- $140 for PB members.
I hope your efforts prove two things it can be done with diquat and also the effort required for diquat control vs. flouridone.
Scott is right on with his comment, Like I said we hit it back to back days mutiple times in our eradication efforts.
