番茄脐腐病又称顶腐病、蒂腐病 ,属于生理性病害。发病初期在幼果脐部出现水渍状斑点 ,后病斑逐渐扩大 ,通常直径达 1～ 2 cm,严重时扩展到小半个果实。后期遇潮湿条件 ,病斑受腐生霉菌的寄生而出现黑色或红色霉状物。在干旱年份发生较重 ,对番茄生产影响较大。1　发生原因a.生 Tortoise tomato, also known as top rot, pedicle rot disease, is a physiological disease. Early onset of juvenile umbilical water-like spots appear, after the gradual expansion of the lesion, usually 1 ~ 2 cm in diameter, severe extended to half a fruit. Late wet conditions, the lesion by the parasitic fungal mold black or red mildew. Occurred in the drought years heavier, a greater impact on tomato production. 1 reasons a. Students