番茄在杂交制种生产中,往往易发生茎基腐病,且蔓延迅速,造成产量大幅度下降,经济损失严重。症状主要为害大苗或定植后番茄的茎基部或地下主侧根,病部初呈暗褐色,后绕茎基或根茎扩展,致皮层腐烂,地上部叶片变黄,果实膨大后因养分供不应求逐渐萎 Tomato hybrid production in the production, often prone to stem rot, and spread rapidly, resulting in a substantial decline in production, serious economic losses. The main symptoms of large seedlings or colonization of tomato seedlings or underground roots side of the main root, the disease was dark brown at the beginning, after around the base or rhizome expansion, resulting in cortical decay, aboveground leaves turn yellow, fruit enlargement due to shortage of nutrients gradually wilt