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1976—78年,我们对广州地区瓜类蔬菜普遍出现的“死藤”病进行了初步调查研究。通过分离、培养及接种试验证明,病原菌是一种疫霉菌(Phytoph-thora sp.)。从调查结果来看,本病多在生长后期(结瓜期)发生,多雨高湿是决定本病发生流行的重要因素,而温度对加速和延缓病情的发展具有一定的作用。瓜类蔬菜连作以及由于地势低洼,过度密植和灌溉所造成的潮湿小气候都会加重本病的发生。在黄瓜品种间抗病性表现出一定的差异。试验证明,百菌清是防治本病的有效药剂,于发病前或发病初期每隔4～7天喷一次75%可湿性粉剂的600倍稀释液,连喷3～4次,可获得较好的效果。
In 1976-78, we conducted a preliminary investigation of the “dead vine” prevalence in melons and vegetables in Guangzhou. Through isolation, culture and inoculation tests proved that the pathogen is Phytophthora sp. From the survey results, the disease mostly in the late growth stage (fruiting period), rainy high humidity is an important factor in determining the prevalence of this disease, and temperature to accelerate and delay the progression of the disease has a certain effect. Continuous cropping of cucumbers and the humid microclimate caused by low lying, over-dense planting and irrigation can aggravate the disease. Disease resistance in cucumber varieties showed some differences. Experiments show that chlorothalonil is an effective agent for the prevention and treatment of this disease, before the onset of disease or the early onset of every 4 to 7 days spray a 75% WP 600 times diluted solution, and even spray 3 to 4 times, get better Effect.