近几年西红柿脐腐病逐年加重，一般使西红柿减产10／～50／，严重年份减产60％以上，给农民造成重大损失。脐腐病一直难以防治，成为西红柿生产上的一大难题。一、病害症状：西红柿脐腐病又称蒂腐病．农民叫烂脐。主要发生在幼果和未成熟的绿果上，红熟果不易发病。开始在果实? In recent years, tomato umbilical rot year by year aggravating year by year, the general reduction of tomatoes 10 / ~ 50 /, serious years, more than 60% cut, causing heavy losses to farmers. Umbilical rot has been difficult to prevent and control, a tomato production become a major problem. First, the symptoms of disease: tomato umbilical rot known as pedicle rot. Peasants called bad navel. Occurs mainly in young fruit and immature green fruit, red ripe fruit is not easy to disease. Start in the fruit?