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黄瓜疫病菌的培养性状、寄主范围及大部分形态与瓜疫霉(Phytophthora melonis Kat-?ura)基本一致。但病菌的菌丝有明显的肿胀及瘤状结节,新孢子囊是以层出方式产生的。 黄瓜疫霉菌侵染植株后,镰刀菌及细菌可乘虚而入,进行第二次侵染,加重病势。接种后遇高温,病害迅速发展。抗病性测定说明在广州地区栽培面积较大的夏、秋黄瓜品种中,尚无高抗品种,以“夏青2号”及“秋青10号”抗病性稍强。 盆栽试验证明:65％敌克松(吉林产)1000倍液防效显著,以播种前土壤施药与生长期喷药相结合的方法最好。敌克松200ppm完全抑制体外病原菌的生长,即使还能形成孢子囊,数量也极少。这些试验结果为田间防治试验提供了依据。
Cucumber blight traits, host range and most of the morphology and Phytophthora melonis Kat-? Ura basically the same. However, the mycoplasma bacteria have obvious swelling and nodules, spores are generated by the layer way out. After the cucumber Phytophthora infesting plants, Fusarium and bacteria can take advantage of, for the second infection, aggravate the disease. Inoculation after high temperature, the rapid development of disease. The results of disease resistance test indicated that there was no high resistance variety in summer and autumn cucumber cultivars with larger cultivated area in Guangzhou, and the resistance to “Xia Qing 2” and “Qiu Qing 10” was slightly stronger. Pot experiments showed that: 65% of the enemy Kesong (Jilin) 1,000 times the liquid control effect was significant, before sowing the soil application and growth of the best combination of spraying methods. Nifu Song 200ppm completely inhibited the growth of pathogenic bacteria in vitro, even if the formation of sporangia, the number is very small. These test results provide the basis for field control experiments.