2001年10月中、下旬,临淄区越冬番茄各品种陆续轻重不同地大面积发生了青枯病,通过及时指导防治,减轻和缓解了病害的蔓延,挽回了一定的经济损失。现将此病害在皇城镇后下村的发生及综合防治技术简结如下。一、发病症状先是顶叶萎蔫下垂、后下部叶凋萎,初期中午萎蔫,早晚恢复。拔出植株发现多数须根坏死,茎基部产生部分不定根,维管束变褐,严重时,如挤压茎部会流出白色浓状物,有异味。二、发病原因分析从2000～2001年9月和10月份气象资料分析,2001年10月份比2000年10月份旬平均气温高3℃,地温高0.6℃,相对湿度降低10个百分点, In mid and late October, 2001, the varieties of winter-boring tomato in Linzi district were seriously affected by bacterial wilt. The timely prevention and control of the disease led to mitigation and mitigation of the disease and saved some economic losses. Now this disease in the town after Huangcheng the occurrence and comprehensive prevention and control technology is summarized as follows. First, the incidence of symptoms first wilting drooping parietal lobes, the lower part of the leaf withered, early noon wilt, sooner or later recovery. Most of the plants were found to have necrotic necrosis by pulling out the plants, some adventitious roots were formed at the base of the stems, and the vascular bundles were browned. In severe cases, the white stems would be exuded from the stems and the odors would be felt. Second, analysis of causes From 2000 to 2001 in September and October meteorological data analysis, in October 2001 than in October 2000 ten days average temperature high 3 ℃, high temperature 0.6 ℃, relative humidity decreased by 10 percentage points,