Fire Blight and Copper Sulfate

I understand a copper sulfate solution is effective against fire blight. I have about one pound of copper sulfate crystals (blue). I don’t need hundreds or thousands of gallons of the mix to treat my three pear trees. How much in grams or ounces should I use per gallon (or 5 gallon) to make the mix? I have an electronic scale that measures 0. 0 oz. I assume the answer you’ll give me is by weight. . . . yes?

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1 Comment To "Fire Blight and Copper Sulfate"

#1 Comment By Nikki On 05/15/2011 @ 11:06 am

At its lowest rate, use approximately 9 grams of copper sulfate per gallon of water.

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