This manual is designed by the Massachusetts Cooperative Extension Service as a guide for the control of the most common insects and related pests of floricultural crops grown commercially in glass and plastic houses in Massachusetts. The publication consists of two sections. The first section presents a description of the major pests of floricultural crops, their biology, and the damage they cause. Some of these pests include aphids, beet armyworm, cockroaches, cutworms, leaf miners, loopers, mites, scale insects, slugs and snails, thrips and whiteflies. This is followed by general information and the methodology for using pesticides effectively and safely. The second section provides information on the control of pests on specific crops such as pesticide formulations and methods of application, safety precautions, storage of pesticides, pesticide delivery calculations, the safe use of temik, toxicity of pesticides and reported phytotoxicity of Acaricides and insecticides to ornamentals. The metric system and poison centers in Massachusetts are also presented at the end of the manual. (HM)