Mycosphaerella Pinodes II. The Phenology of Ascospore Release

Abstract

Continuous sampling within the foliage zone of peas grown in field plots at the Waite Institute in two seasons has revealed details of the fluctuation with time and with moisture supply in output of Rscospores of M. pinode8 (Berk. & Blox.) Vestergr. Dew moisture is shown to be effective in causing release of ascospores, but the largest airborne concentrations occur early in periods of rainfall.