一、发病症状及原因 1.病症,顶腐病发生在果实的顶端部分。当果实处于着色期时,在果实顶端以落花部位为中心,产生暗绿色水浸状病斑,逐渐变成褐色或黑褐色,病斑向内凹陷,多革质化而不腐烂,受害果实提早成熟。果实受害部位若遇雨或湿度过大时,容易引起霉菌哿生而发霉腐烂。 First, the incidence of symptoms and causes 1. Illness, top rot occurs in the top part of the fruit. When the fruit is in the stained period, the flower is located at the top of the fruit with the flower-falling site as a center, resulting in a dark green-like spot that gradually becomes brown or dark brown, the lesion is inwardly depressed, and more leathery rather than decayed, mature. Fruit damaged parts in case of rain or humidity is too large, it is easy to cause mold and raw moldy rot.