Soybean Diseases and Corn Diseases booklets: a combined 88-page compendium of soybean and corn diseases in Iowa and the greater north central region, in full color. Each guide is complete with disease life cycles and diagrams, as well as foliar disease estimation charts. Field Crop Insects : contains descriptions and color images of more than 55 pest and beneficial insects, as well as information on insect life cycle, damage, scouting and management options. There is also information on basic en...