Release of Guignardia bidwellii ascospores and conidia from overwintered grape berry mummies in the vineyard

摘要

Background and Aims: Black rot, caused by Guignardia bidwellii, is a polycyclic grape disease with repeated primary and secondary infections. In this work, the release of primary inoculum (both ascospores and conidia) from overwintered grape mummies was studied over a 3-year period.