Methods and Principles for Interpreting the Phenology of Crop Pests

Abstract

In the present state of affairs, this paper proposes primarily to call attention to a method of defining the relations of plant diseases to climate and weather; but it intends, also, to make additional suggestions which may be useful to entomologists (the latter having used the method to a limited extent) and to point out some of the fundamental principles concerned. If certain sections of the paper should appear to readers to be lacking in conclusiveness, the writer would respond that his aim has been not so much to draw final conclusions as to illustrate the potentialities of a method.