Abstract:

The study was to research the influence of different processing tomato varieties, different seeding time, different plant pattern and meteorological factor to processing tomato early blight diseasing under field. The results showed that the principal reason of processing tomato early blight seriously occurring were most processing tomato varieties were susceptible and highly susceptible. When seed sowed in April 25 and seedling transplanting in May 10, processing tomato early blight seriously occurring and the disease index were 88.33 and 76.66 respectively. When seed sowing and seedling transplanting were planted in May 9, different seedling transplanting treatment had highly disease index than different seed sowing treatment respectively and all treatment mulching methods increase the disease index than natural planting. The method that plastic film covered then covered with straw had highest diseased, the disease index were 45. The higher daily average temperature in May and higher rainfall had caused processing tomato early blight seriously occurring.