西瓜重茬剂──枯萎病的克星西瓜不能连作，必须隔５年以上才能再种，否则轻则减产３０％－４０％，重则减产７０％－８０％，甚至绝收。这是西瓜易染上枯萎病所致。西瓜枯萎病是由一种能在土壤中的病残体上越冬、生活力很强、其厚垣孢子和菌核在土壤中可存活１０年以上的... Watermelon stubble agent ─ ─ wilt disease nemesis watermelon can not even work together, you must 5 years or more in order to re-species, otherwise light output reduction of 30% -40%, weight reduction of 70% -80%, or even absolute. This is caused by watermelon wilt blight. Watermelon Fusarium wilt is a disease that can survive in the soil over winter, strong vitality, the chlamydospores and sclerotia in the soil can survive more than 10 years ...