地理分布 杧果白粉病菌在世界上传播很广,赤道南、北纬40度之间,撒哈拉大沙漠南部的许多非洲国家,中东、南亚,从美国南部到秘鲁和巴西一带的美洲地区都有分布。据报道,在澳大利亚新南威尔士也有分布。寄主和症状 杧果白粉病菌除侵害杧果外,尚未发现有其它寄主。病菌侵害花序各部以及叶片和果实的幼嫩组织。染病器官上先出现一些分散的白 Geographical Distribution The fruit powdery mildew spreads widely in the world. The southern equatorial South ranges from 40 degrees north latitude to many African countries in the southern Sahara, the Middle East and South Asia, and from the southern part of the United States to the Americas in Peru and Brazil. It is reported that there is also distribution in New South Wales, Australia. Host and Symptoms 杧 fruit powdery mildew in addition to invasive 杧 fruit, but no other host has been found. Pathogens invade all parts of the inflorescence and the young tissues of the leaves and fruits. Some scattered white first appeared on the infected organ