Sugar Baby Bush might resist our resident foliar disease

I read that copper can be used as a fungicide to help fight anthracnose in watermelons. So, I'm trying that out, this year, but I'm adding zinc and iron, too (all three are sulfates). It seems to be working (several days after a soil application—not right away). We'll see if it keeps working when the heat goes down in September.

FYI: Copper can be dangerous to plants if over-applied (and it can stay in the soil for a long time). It can be dangerous to humans if they get too much, too (and cause internal bleeding, zinc deficiency and such).