Detailed interactive powerpoint presentation covering insecticides. Numerous colorful pictures and graphics are used throughout. Includes stomach poisons, contact poisons, systemics, fumigants, repellents, inorganic compounds, synthetic organic compounds, chlorinated hydrocarbons, DDT, biological magnification, and formulations. Questions and terms are presented without the answer. Answers and definitions are shown when the instructor clicks the mouse. This is an excellent method for class discussions and review. Search Insecticides worksheet/yorke for a free student worksheet to accompany this powerpoint. 100% MONEY BACK GUARANTEE! If you are not 100% satisfied with my work, email your address to me and I will return your money, no questions asked.