近几年来,在广州市郊、番禺、南海、增城、新会、肇庆等县、市的丘陵山地或旱地秋播春植的“穗中红”或其他早熟高产番木瓜,较普遍地发生一种以果实、嫩叶、花瓣、茎干上流出乳汁、果实发生瘤状突起、果实不同部位组织变褐或树脂状沉淀物;幼根死亡、种子败育退化、幼嫩白色种子变成褐色,成熟果中,部分种子变棕色;花穗干枯脱落,花及幼果变黄脱落;新生掌状叶的尖端逐渐向内变褐干枯,直至顶部的叶脱落,产生秃顶等复杂病状.一般情况下春植的番木瓜于7、8、9月开始出现病状,秋冬干旱低温条件下表现更加严重.在某些果园,即使周年有水灌溉,仍产生严重病状,造成极大损失.如番禺县石基九队, In recent years, in the suburbs of Guangzhou, Panyu, the South China Sea, Zengcheng, Xinhui, Zhaoqing and other counties, cities in the hilly or dry land autumn planting “spike red” or other early maturing high-yield papaya, occurs more commonly A kind of fruit, young leaves, petals, stems on the outflow of milk, the fruit tumor-like protuberances, browning or resinous tissue in different parts of the tissue precipitate; young root death, seed abortion degradation, the young white seed becomes Brown, ripe fruit, some of the seeds turn brown; flowers dry off, flowers and young fruit turn yellow off; new palm-like leaf tip gradually browning inward until the top of the leaves off, resulting in bald and other complex diseases. In the case of spring planting papaya in July, August and September began to appear symptoms, autumn and winter drought conditions even worse performance in some orchards, even if the annual water irrigation, there are still serious illness, causing great losses, such as Panyu County-based nine teams,