This stuff can easily clog your sprayer. Mine has never clogged.
First always put water in first. Also almost all, with some exceptions almost all pesticides work better and last days/weeks longer in acidic water. For example malathion works for 8 hours in tap water above neutral. Malathion will work for 36 hours in water with a pH of 5.0. So if using tap water add vinegar till you acheive a pH of 5.0. In most regional tap waters about 1 tablespoon gets you close. Some more, some less.
So water, then vinegar, now the copper. ALWAYS check our spray guides. Then the sticker
For * Kocide 3000 - dormant 2 Tbsp/gal; growing season 1tsp/gal (copper can be sensitive to some leaf tissues, check into it before spraying copper on a fully leafed-out tree).
For sticker
- Nufilm-17 - 1/2 tsp per gallon
- Don’t use Nufilm with Surround. Do use it with sulphur and copper if possible.
- Pinene II - 1/2 tsp per gallon
I would like to add I use acidic water not only to extend effectiveness, but chemicals mix better in acidic water. This could mean the difference between a clog or not. Keep shaking the pump every few minutes when spraying.