I use a three gallon spot sprayer and a 25 gallon cart sprayer ($200 to $300.00).
I don't like to spray the pondweed growing along the bank because it seems to keep duckweed locked up instead of allowing it to drift around. Unfortunately, the hand wand doesn't allow the spray to be concentrated against the bank. But this year we've bad so much rain that I decided to spray rather than risk a bank cave-in that might cause my tractor, mower and me to go into the pond.
I also use the 25 gallon sprayer to spray webworms in the pecan trees. The 60psi pump allows the spray to reach a vertical height of around thirteen feet, which won't reach the little buggers next year.
If anyone has a suggestion that would address that problem, please post it.
