番木瓜是著名的热带亚热带水果,原产南美州,引入我国已有三百年栽培历史,现在广东,福建、广西等省区广为栽培,有“岭南果王”美称。从1979年起广东的番木瓜果园普遍发现果实瘤状病。患病的植株嫩果流出乳汁,幼根衰亡,种子败育退化等;果实呈瘤状突起,果肉呈硬块,变褐色或有树脂状沉积物,不能作生果食用,失去商品价值。在丘陵山地及秋季缺水果园,病株病果严重出现,产量损失一半以上, Papaya is a famous tropical subtropical fruit, originating in South America, the introduction of our country has three hundred years of cultivation history, and now Guangdong, Fujian, Guangxi and other provinces widely cultivated, “Lingnan fruit king” reputation. Since 1979, papaya orchards in Guangdong are commonly found in fruit-borne diseases. Diseased plant tender fruit out of the milk, young root decline, seed abortion degradation; fruit was tumor-like protrusions, lumps were lumps, brown or resinous deposits, can not be used for fruit consumption, loss of commodity value. In the hilly and mountainous areas and the autumn lack of fruit orchards, disease serious consequences of disease, yield loss of more than half,