番茄百利品种灰叶斑病发生初报

Primary Report of Tomato Gray Leaf Spot on Beril Cultivar

采用病害分级调查的方法对番茄百利品种上灰叶斑病的发生情况进行田间调查,并对病情指数、发病率与气象因子之间的关系进行分析。结果表明,在我国中部种植的春播百利番茄地区,番茄灰叶斑病的发病初期为4月上旬,此时旬平均温度为12.6℃,平均相对湿度为59.20%,这段时期是控制番茄灰叶斑病的关键时期;该病扩展速度很快,在5月中旬发病达到高峰,此时旬平均温度为18.67℃,平均相对湿度为71.00%。当3月中下旬温度超过10℃相对湿度在50%以上时,应对此病进行及时预防。

Beril is a variety with high yield and beautiful fruit, good rigidity, strong anti-rending and longer storing characters, bred in the Netherland country. In order to know the reaction of the variety to tomato gray leaf spot very well, the relationship between the weather factor and the occurrence of disease leaf（ the disease index and the frequency of disease leaf） were analyzed on the basis of the some symptoms of damage were described in the field. The results showed that the disease has occurred at initial stages April, which the average of the temperature was 12.6℃ and the relative humidity was 59.20% .It was key period to control the disease in this stage. Because the rapidness of tomato gray leaf spot, it would reach the highest frequency in the middle stage May, which the average of the temperature was 18.67℃ and the relative humidity was 71.00%. When the average of the temperature overpasses 10℃ and the average of the relative humidity exceed 50 %, some measures should be made in order to control the disease.