近年来，西瓜枯萎病菌引起的西瓜枯萎病害范围逐渐扩大，危害日益突出。
In recent years, watermelon Fusarium wilt has become an increasing threat to watermelon production around the world.
通过对供试菌系致病力测定，河北省西瓜枯萎病菌致病力存在显著差异，致病力最强的菌系是FON31和FON40，致病力最弱的菌系是FON12。
There was significant difference among isolates from Hebei by identifying the pathogenecity. The strongest isolates were FON31 and FON40, the weakest isolates was FON12 on the pathogenecity.
结果表明，西瓜幼苗根毛区是枯萎病菌最易侵染的部位。
The results showed that the root hair zone was the most susceptible region.
采用琼脂稀释法测试了它们的生物活性，结果表明这些嘧霉胺盐对棉花、黄瓜、西瓜以及番茄枯萎病菌均具有较好的抑制作用。
Eleven of them are reported for the first time. Their preliminary toxicities have been tested by asp-agar-diluted method. The results showed that they exhibited excellent fungicidal activities.
采用琼脂稀释法测试了它们的生物活性，结果表明这些嘧霉胺盐对棉花、黄瓜、西瓜以及番茄枯萎病菌均具有较好的抑制作用。
Eleven of them are reported for the first time. Their preliminary toxicities have been tested by asp-agar-diluted method. The results showed that they exhibited excellent fungicidal activities.
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