梨叶枯病发生规律与诱病因子研究

Studies on the occurrence and disease inducing factor of pear leaf spot

梨叶枯病 (MycovellosiellapyricolaGuo,Chen&Zhang)是梨树新病害 ,分布于甘肃临夏、兰州、定西等地。病菌以子座在病落叶上越冬 ,翌年 6月初显症 ,8月中、下旬发病达高峰期。降雨量、湿度是主要诱病因子 。

Leaf spot disease (Phaeoramularia pyrigena S. K. Singh at R. K. Chaudhary) was a newly reported disease of pear in China occurred in Linxia, Lanzhou, Tianshui, Dingxi areas of Gansu Province. Stroma on fallen leaves overwintering produced conidia in next spring and caused the symptom in early June. The disease reached peak of epidemic in mid or late August after several secondary infections. Precipitation and humidity were major disease inducing factor. Standing site and management pratice also had effects on this disease.