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田间露时、露温折算的温露系数与大白菜病情扩展呈极显著正相关。试验所用几种农药均有良好防治效果,但防效有差异,以50％瑞毒霉锰锌效果最好。
When exposed in the field, the coefficient of temperature and humidity of the conversion of the temperature and temperature was significantly and positively correlated with the expansion of the Chinese cabbage. Several pesticides used in the experiment have a good control effect, but there are differences in control effect to 50% refeberel manganese and zinc the best.