Natural Remedies for Rose Diseases: Mildew, Rust, Black Spot, Canker
Cider Vinegar Recipe for Black Spot - Mix 3 tablespoons of cider vinegar (I always buy Braggs as it has the mother culture) to 5 quarts ( 5 liters) of water. Add 1 teaspoon of vegetable oil and a good squirt of soft soap to make sure that your organic spray sticks to the leaves. Spray on plant early morning or evening to prevent leaf burn. Reapply as necessary, and always after it has rained, once the leaves are dry.
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Gallon of water, 1 chopped onion add to gal of water. let it sit under the sun for 3days and spray it over your veg plants, n flowers to keep bugs from eating the leaves. I personally used it on the lawn and around the windows n doors to keep the bugs n mosquitoes away and it worked. I read this in magazine from old sturbridge village. Cant recall what year