Safer® Brand Insect Killing Soap Concentrate eliminates insect pests so your garden plants can grow healthy and strong. Kills soft-bodied insects while remaining gentle enough to spray directly on your plants. Safer® Brand Insect Killing Soap has no unpleasant odor, so you can still enjoy the natural aromas of your garden. Can be used right up to day of harvest. 49.52% potassium salts of fatty acids.