Natural Guard Copper Soap Fungicide Concentrate features a unique formula that helps control plant diseases on fruits, vegetables, and roses. It contains Copper Octanoate as its active ingredient which helps protect your plants against diseases such as anthracnose, needle blight, black spot, leaf spot, fruit spot, cedar apple rust, powdery mildew, peach leaf curl. early blight and late blight on tomatoes. It is OMRI Certified so it is safe for organic gardening and it may be used up until harvest day.