Abstract:

Recent years, Fusarium root rot of melon (Cucumis melo) has caused more and more serious damage to melon production in some area of China. We studied the biological characteristics of the pathogen (Fusarium solani (Mart.) Sacc.) in order to provide the basis for the melon breeders to screen the resistant germplasm resources and select resistant melon cultivars to the disease. The results are showed as follow: The temperature affects pathogen growth greatly, the range of temperature for the pathogen growth is 10-40℃, and the optimum is 30℃; The pathogen grows slowly at pH 4,but grows rapidly and different pH has little influence on its growth at the range of pH 5-10; It can utilize many kinds of carbon sources very well; Nitrogen nutrient has a strong effect on the growth of the pathogen, and nitrate-nitrogen [NO3-N] is suitable for its growth, but ammonium-nitrogen [NH4-N] does not favor the pathogen; Both the temperature and relative humidity are the key factors for the conidia germinating, and 100% and 30℃ are the optimal relative humidity and the optimal temperature for the conidia germinating, separately; The conidium lethal temperature is 57℃, 10 minutes lasted.