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京郊黄瓜枯萎病致病菌经鉴定为尖孢镰刀菌(Fusarium oxysporum Schlecht.)。该病发病最适合温度25～28℃,低于20℃或高于35℃时,发病减轻。相对湿度在80％以上,发病严重。病害消长与黄瓜生育期亦有关系,结瓜期开始显症状,结瓜盛期受害最重。另外,在有根结线虫时,发病也加重。防治试验,是在夏天进行土壤消毒。措施有:(1)清洁田园;(2)每亩施石灰100公斤、碎稻草500公斤;(3)深翻土壤66厘米;(4)起高垅33厘米;(5)灌水,使沟里的水始终呈饱和状态;(6)铺盖地膜、密闭大棚20天。经测定20厘米以上土温平均40℃以上,防治黄瓜枯萎病效果达89.11—91.49％,每亩增产10％左右,还可兼治根结线虫(Meloidogyne sp.)
The cucumber wilt pathogen in the suburbs of Beijing was identified as Fusarium oxysporum Schlecht. The incidence of the disease most suitable temperature 25 ~ 28 ℃, less than 20 ℃ or above 35 ℃, the incidence of reduced. Relative humidity above 80%, the incidence is serious. Diseases growth and development and cucumber are also related to the growth period, fruiting period began to show symptoms, fruiting most of the victims. In addition, the root knot nematodes, the incidence also increased. Prevention and control test is carried out in the summer soil disinfection. The measures are as follows: (1) to clean the garden; (2) to apply 100 kg of lime and 500 kg of straw per acre; (3) to deep-turn the soil to 66 cm; (4) to raise the height of 33 cm; Of water is always saturated; (6) cover the plastic film, sealed greenhouse for 20 days. It was determined that soil temperature above 20 centigrade averaged over 40 ℃, the cucumber wilt resistance effect reached 89.11-91.49%, yield increased about 10% per mu, but also the root-knot nematode (Meloidogyne sp.)