Safer Insect. Soap - Concentrate, 16 oz. Made from fatty acids derived from plant and animal origin. This biodegradable, insecticidal soap works as a contact only which means good coverage is critical to achieving control. Safer's Soap is effective against aphids, whiteflies, leafhoppers, spider mites, mealybugs, scale, pear psylla, earwigs, spittle bugs and rose slugs. Concentrate formula contains 49% potassium salts of fatty acids and 51% inert ingredients. Normal application is 2.5 - 4 oz. of Safer concentrate mixed with a gallon of water (or a 1 to 2% solution)Ship wt 2#. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTE: IF YOU HAVE HARD OR ALKALINE WATER: Many people have had partial or total failures with Insecticidal Soap and thought it didn't work or they weren't getting good enough coverage. But the real problem was that their hard or alkaline water was inactivating the soap in the spray tank. . . . . . If you think you may have hard water, a simple test can be done by putting a small amount of Safer's soap (at normal dilution) in a jar of water and shake to see if you get any foam. If you don ft.t get any foam, you have hard water and a water hardness kit should be ordered to determine how much water softening agent (such as Hampene or Triton AG44M) must be added to the tank to prevent the potassium salts from getting tied up by the excess calcium or magnesium present in the hard water. Ask for details on how to determine if you have hard water. 16 oz bottle. Ship wt 2#