THE DIAPAUSE AND RELATED PHENOMENA IN GILPINIA POLYTOMA (HARTIG): V. DIAPAUSE IN RELATION TO EPIDEMIOLOGY

Abstract

This final paper in the series on diapause in the spruce sawfly describes the direct and indirect influences of diapause on epidemiology in different parts of the distribution range in eastern North America. These relate to duration of diapause, degree of diapause in overwintered cocoons, and proportions of the population surviving to participate in the continuation of the infestation. The nature of infestations in different areas is described briefly.Discussion of features of intraspecific differences, and a summary of conclusions derived from all five papers in the series, are also included.