This guide is intended to provide current effective management options for insect and other arthropod pests and for plant pathogens affecting all major field crops grown in North Dakota, South Dakota, Minnesota, Nebraska, Iowa and Kansas. Chemical and nonchemical control practices, when available, are described in detail for individual pests and pathogens. These practices include cultural and biological control options, and host plant resistance. By including alternatives to pesticides, we hope to create a ready reference of management strategies growers will consider when faced with a pest problem.