江苏农业学报2026，Vol.42Issue(4)：701-708,8.DOI:10.3969/j.issn.1000-4440.2026.04.006
寡雄腐霉菌株GAQ1对黄瓜猝倒病的防效及对黄瓜的促生作用
Biocontrol efficacy of Pythium oligandrum strain GAQ1 against cucumber damping-off and its growth-promoting effects on cucumber
摘要
Abstract
Biological control has garnered significant attention due to its environmental friendliness and safety in ad-dressing both biotic and abiotic stresses in crops.However,the number of commercially available biological control products remains far lower than that of chemical pesticides.This study focused on the biocontrol oomycete Pythium oligandrum strain GAQ1 ginger isolated from ginger field soil,and systematically evaluated its antagonistic effects against P.aphanidermatum,its efficacy in controlling cucumber damping-off,and its growth-promoting effects on cucumber plants.The results demonstrated that GAQ1 could achieve mycoparasitism through hyphal coiling,leading to exten-sive inactivation or death of P.aphanidermatum hyphae.Pot experiments revealed that GAQ1 treatment significantly reduced the incidence of cucumber damping-off,with the disease index decreasing from 71.9 to 21.9 and a control efficacy of 69.57%.Furthermore,after four weeks of GAQ1 treatment,the growth parameters of cucumber plants including plant height,root length,leaf number,SPAD value,aboveground fresh weight,and underground fresh weight were significantly enhanced,with increases of 9.72%,65.48%,18.67%,5.74%,24.19%,and 78.35%,respectively.In conclusion,P.oligandrum GAQ1 not only exhibited remarkable control efficacy against cucumber damping-off but also significantly pro-moted plant growth.This study provides data support for the development and application of GAQ1,offers a new candidate strain resource for the biological control of diseases caused by P.aphanidermatum,and holds significant importance for ad-vancing sustainable green agriculture.关键词
寡雄腐霉/瓜果腐霉/黄瓜/生物防治/促生作用Key words
Pythium oligandrum/Pythium aphanidermatum/Cucumis sativus/biological control/growth-promoting effect分类
农业科技引用本文复制引用
魏黎欣,李泽宇,赵敏,苏东徽,周冬梅,魏利辉,乐秀虎,王楠..寡雄腐霉菌株GAQ1对黄瓜猝倒病的防效及对黄瓜的促生作用[J].江苏农业学报,2026,42(4):701-708,8.基金项目
国家特色蔬菜产业技术体系项目(CARS-24-C-01) （CARS-24-C-01）
邯郸市科学技术研究与发展计划项目(21422012329) （21422012329）
