Pest or Disease - Aphids, caterpillars, thrips, two-spotted mite, whitefly, powdery mildew, rust. Black Spot on roses only.How to Apply - Spray all foliage thoroughly, including the undersides of foliage. Commence spraying when new shoots emerge in spring or at first sign of insects or disease. Repeat at 14 day intervals if required. Two-spotted mites may require more frequent applications.