maya i forgot to look at the label today to see what weight it was. But in the directions it said for alternia blight not to good on the spelling, but anyway it said one full teaspoon for one gallon of water, and that is what i have been doing. I have never had to deal with spraying in my life. my plants for the most part are pretty spaced out so i have never had to deal with any diseases. So actually maya i am pretty clueless to what i am doing. But so far it hasn't spread to any of the other plants and it doesn't seem to have done anymore damage to the ones infected. its also a bad year for us here in Ky blight has hit everything from our cherry trees, apple trees, and tomatoes. It has been super wet here also probably the reason behind all of this.