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西瓜最忌重茬。在普通栽培条件下,连作常因枯萎病(又名蔓割病,瓜农俗称重茬病、倒秧子)而造成严重减产甚至绝产。特别是保护地西瓜栽培,因难以经常轮作,更不易避免为害。对此病的防治目前尚无特效药物,如采用换土或土壤消毒措施,则成本很高,且效果亦不甚理想。西瓜枯萎病源是一类导管型镰刀菌,主要侵染西瓜的导管系统。该病菌以厚垣孢子及菌核在土壤中越冬,可存活6—8年。其传播途径除土壤外,种子、粪肥、水流等均能传菌。西瓜导管型镰刀菌的
Watermelon most avoid heavy crop. Under normal cultivation conditions, continuous crop blight (also known as fusarium disease, melon farming called stubble disease, inverted seedlings) and cause serious cuts or even absolute. In particular, the protection of watermelon cultivation, because it is difficult to often rotation, more difficult to avoid harm. At present there is no effective medicine for the prevention and treatment of this disease. If the soil replacement or soil disinfection measures are adopted, the cost is very high and the effect is not very satisfactory. Fusarium wilt watermelon is a type of duct-type Fusarium, the main watermelon infiltration of the catheter system. The bacteria to chlamydospores and sclerotia in the winter soil, can survive 6-8 years. The route of transmission in addition to soil, seeds, manure, water flow Dengjun bacteria. Watermelon type Fusarium