Never allow unused insecticide to flow into storm drains because they may harm fish and aquatic life. Rinse the tank three separate times, spraying clean water through the nozzle each time. Always use the least toxic method of control as your first step. Apply insecticides when the insects are feeding, usually early morning or early evening. Spray only the plants that are infested.
Insecticides also kill garden-friendly bugs.
Never mix more chemicals than you intend to use at one time. Always follow label directions. When spraying insecticides, wear protective clothing, including safety goggles, respirator, neoprene gloves and long sleeves. Hoses will work themselves loose if not treated with care. Check hose connectors frequently.