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对西瓜枯萎病菌（Ｆｕｓａｒｉｕｍｏｘｙｓｐｏｒｉｕｍｆ．ｓｐ．ｎｉｖｅｕｍ）的生物学特性测定结果表明：病菌生长温度范围１０～３５℃，适宜生长温度２５～２８℃；分生孢子在饱和相对湿度下萌发率为７２．６％，在水滴中达８５．２％；分生孢子的致死温度为５５℃１０ｍｉｎ；病菌生长的ｐＨ值范围在２．３８～１１．４５，最适ｐＨ值为６．６５～９．６９。室内药效测定结果表明：７０％代森锰锌３００倍，４０％灭病威３００倍和５００倍，２５％多菌灵３００倍和抗枯灵５００倍对枯萎病菌菌丝生长有明显的抑制作用。田间防治以嫁接苗的防治效果最好，达９１．２％；其次为１５％粉锈宁１０００倍和５０％ＤＴ６００倍，防效分别为６８．４７％和６５．０５％。
The biological characteristics of Fusarium oxysporium f.sp.niveum were studied. The results showed that the growth temperature ranged from 10 to 35 ℃ and the optimum temperature ranged from 25 to 28 ℃. The conidial germination rate at saturated relative humidity was 72.6 %, 85.2% in water droplets; the lethal temperature of conidia is 55 ℃ for 10min; the pH range of bacteria growth is 2.38 ~ 11.45, the optimum pH is 6.65 ~ 9.69. The results of indoor pharmacodynamics test showed that 70% mancozeb 300 times, 40% eradication 300 times and 500 times, 25% carbendi 300 times and anti-guling 500 times obviously inhibited mycelial growth of Fusarium oxysporum effect. The control effect of grafted seedlings in the field was the best, reaching 91.2%; followed by 1000% and 15% DT600 times of 15% triadimefon. The control effects were 68.47% and 65.05% respectively.