番茄灰霉病自1983年在我区发现以来,为害率日趋严重,严重田块,病果率达10％左右,并且发病面积普及全区,为此,番茄灰霉已成为郊区番茄丰产的主要障碍因子之一。一、发病规律 1、为害部位及症状番茄灰霉病植株地上部分都能受害,包括花、果实、叶和茎,但茎上受害现象极为少见。据调查,花被害率为93.0％,果实为48.0％,叶为44.0％。番茄花部受害后,花瓣不能正常开放,萎缩,呈灰黄色,最后,整个花器官变为浅灰色,湿度大时,上面有灰霉物,形成落花。果实受害以果柄部为主,少数果蒂部发病,开始时在附近产生水渍状病斑,并逐渐扩大,病部软化, Since tomato gray mold disease was discovered in our district in 1983, the damage rate is becoming more and more serious. In severe fields, the rate of diseased fruit reaches about 10% and the disease area popularizes in the whole region. To this end, gray mold of tomato has become the main yield of tomato in the suburbs One of the obstacles. First, the incidence of 1, the damage parts and symptoms Botrytis cinerea aboveground parts can suffer, including flowers, fruits, leaves and stems, but the stem damage is extremely rare. According to the survey, the flower damage rate was 93.0%, the fruit was 48.0% and the leaf was 44.0%. Tomato flower Department victims, the petals can not be normal open, shrinking, grayish yellow, and finally, the entire flower organs into light gray, humidity, the above gray mold, the formation of falling flowers. The fruit is harmed mainly by the stem of the fruit, a small number of fruit pedicle disease, beginning in the vicinity of water-like lesions, and gradually expanded, softening of the disease,