1. The tomato Cercospora leaf mold broke out in Xinxiang, Henan province in 2003. The symptom of the disease was observed and described, the pathogen and the biological characteristics were studied.

2. The inhibitive effect of dominant microorganisms on leaf mold in tobacco was investigated by method of microbiology.

3. Cucumber downy mildew, tomato early blight and tomato leaf mold are three kinds of the most primary disease in vegetable cultivation in China.

4. It'studied the effect of several fungicides to control tomato leaf mold.

5. Second, in the field, the prevention effect of the garlic and volatile oil of Mosla chinensis on Tomato early blight and Tomato leaf mold matched the one of Chlorothalonile.

6. The result showed that all compounds had good inhibitory to pathogenic bacteria, and the inhibitory to cucumber leaf mold would be as high as 98%.

7. This is also an excellent irrigation method for plants susceptible to leaf mold or other diseases.

8. At the seedling stage, the resistance of the disease of leaf mold of the descendants of receptor into which exogenous DNA had been introduced was tested with the EA, Caruso and Hashi 5 as the check.