Canadian literature on the ecology, behaviour, and life-history is summarized for each of the approximately 46 species of Hemiptera (Heteroptera) and 66 of Homoptera that are recorded as harming annual crop plants in Canada. Twenty-three of the species of Homoptera are known vectors of virus diseases of crop plants in Canada.

Canadian literature on the ecology, behaviour, and life-history is summarized for each of the 48 species of grasshoppers and allied insects that are recorded as harming annual crop plants in Canada.

Canadian literature on the ecology, behaviour, and life-history is summarized for each of the eight species of sawflies, jointworms, and related insects, one species of earwig, eight of thrips, about nine of springtails, thirteen of mites, and one symphylan that are recorded as harming annual crop plants in Canada.