Study on Spread of Grape Gray Mold Spore Sac and Meteorological Epidemic Factors
To understand the incidence pattern and epidemic factors of grape gray mold disease in the north-ern plateau area of the Weihe River in the Guanzhong region,Shaanxi,this study was conducted from May to October 2022.Utilizing spore capture instruments and meteorological monitoring,the study monitored vineyards across three counties along the Weihe River area to analyze the dynamics of pathogenic spore sacs and investigate the field disease index of grapevines.The diffusion dynamics of grape gray mold sporangia exhibited an initial in-crease followed by a decline,with a peak period occurring around August 25th.Meteorological analysis identified daily average temperature and humidity as primary factors influencing the diffusion of grape gray mold spores.Specifically,peak spore sac density occurred at approximately 25℃ with relative humidity ranging between 90％and 95％.Notably,the peak of sporangium diffusion preceded the peak disease index by approximately one month,underscoring the predictive potential of monitoring sporangium dynamics and meteorological conditions for grape gray mold occurrence.These findings provide a foundational basis for the prediction,prevention,and con-trol strategies of grape gray mold disease.
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