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番茄茎基腐病是番茄生产上新发生的一种病害,2000年田间零星发生,2002年后发病面积不断扩大,危害逐年加重, 发病率为15%-35%,重者达50%以上。例如南张镇孙家村2002年种植番茄21.5hm2平均发病率在80%以上,造成经济损失达70万元,严重影响了番茄生产,挫伤了农民种植番茄的积极性。为此,笔者从2002年开始对番茄茎基腐病田间危害症状、发病动态,防治方法进行试验研究,取得了显著的经济效益和社会效益。 1材料与方法 1.1病害症状及发病动态观察 2002-2004年连续三年在孙家村,选择历年发病重的地块进行,从育苗(4月上旬)至成株期(8月中旬),隔10天查一次,记录病害症状及发病动态。
Tomato stem-based rot disease is a new occurrence of tomato diseases, field sporadic occurred in 2000, after 2002, the area of disease continues to expand, the harm increased year by year, the incidence rate of 15% -35%, severe cases of more than 50%. For example, Nanzhang Town Sunjiacun planted 21.5hm2 tomato in 2002 the average incidence of more than 80%, resulting in economic losses of 700000 yuan, a serious impact on tomato production, dampen the enthusiasm of farmers planting tomatoes. To this end, the author began in 2002 on tomato stem-based rot disease symptoms, the incidence of disease, prevention and control methods for experimental study, and achieved significant economic and social benefits. 1 Materials and Methods 1.1 Disease symptoms and incidence of dynamic observation 2002-2004 for three consecutive years in the Sun Village, select the incidence of heavy land over the years, from nursery (early April) to mature stage (mid-August), every 10 Check the day, record the disease symptoms and incidence of disease.