This combination has proven to be the most effective formula to control diseases on roses throughout the season. Applied regularly, it will control black spot and powdery mildew. Available with an insecticide to control thrips, aphids, and bud worms. Concentrate makes 30 gallons. Will treat 20 bushes applied April-October. The Disease Kit includes Thiomyl, Captan (2), & Spreader Sticker. The Disease & Insect Control Kit includes Thiomyl, Captan (2), Spreader Sticker, and Acephate.