This guide is intended for use by those preparing to take the California certification examination for commercial pesticide applicators. The first chapter gives brief descriptions and illustrations of types of insect, vertebrate, plant, and microorganism pests. The other chapters cover pesticide classifications and formulations, labels and labeling, pesticide toxicity and poisoning symptoms, first aid for pesticide poisoning, how to handle pesticides, protective clothing and other safety devices, equipment and calibration, important pesticide use problems, pesticide compatibility and combinations, pesticide residues, and alternatives to pesticides. Also included is a glossary of pesticide-related words. (BB)