Used and trusted by thousands of organic farmers. Controls late blight and other tomato diseases. Serenade safely helps win the battle against fungal and bacterial diseases such as powdery mildew, rust, scab, leaf blight, late blight and more. It can be sprayed on fruits, vegetables and ornamentals and is nontoxic to birds, bees, beneficial insects, fish and wildlife. So safe it can be applied up to and including day of harvest.