Fig. 4. Pycnidiospore survival of Didymella bryoniae placed at soil surface, 5, 15, and 30cm below ground at field.四、在土壤表面、地表下5、15及30公分土壤深度的瓜类蔓枯病菌柄孢子存活情形。
Fig. 5. Influence of pycnidiospore density in soil on the disease incidence of melon cotyledon caused by Didymella bryon五、土壤中添加蔓枯病菌柄孢子对于香瓜子叶发病的影响。