Abstract
Peach [Prunus persica] fruits of the cultivars Redhaven and Loring were harvested weekly beginning in early June and continuing to full ripeness, and were inoculated under controlled conditions with Monilinia fructicola at a range of 103-106 conidia/ml. In both years of the study, fruits were susceptible to infection at all inoculum concentrations for 2 to 3 wk in June. At pit hardening they became resistant to infection at all the inoculum concentrations. Fruits again became increasingly susceptible to infection approximately 2 wk before full ripeness.
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