I was doing about the same until last year. I upped it 3oz per gallon in the backpack. By the end of the season, it’s wearing off of some spots but I usually don’t hit it again.
If you're spraying with a backpack and wand , you're prolly putting out way too much at 1% . Folks tend mix it too hot and spray stuff till its running off the leaves.
"Why do you ask"?
Too many people spend money they don't have , on things they don't need, to impress people they don't know.
