June can bring a number of insects to the garden and one way to be ready for them is to learn more about biological insecticides. Each insect control works a little differently and knowing the differences will help you make a decision on which ones to use and when. Insecticidal Soap uses potassium salts of fatty acids (insecticidal soap) to control a wide variety of insects in the garden and indoors. Potassium salts are made from palm, coconut, olive, castor and cottonseed plants. The fatty acids weaken the insect’s waxy protective outer shell and causes dehydration. Insecticidal soap doesn’t leave a residue and can be used up to the day of harvest. Once the worm eats on the treated leaf, it will stop feeding and die within 2-3 days.