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| Identification of Pathogen Causing Damping off at Seeding Stage of Wax Gourd and Screening of Control Fungicides |
| （1Vegetable Research Institute，Guangxi Academy of Agricultural Sciences，Nanning 530007，Guangxi，China；2Guangxi Key Laboratory of Vegetable Breeding and New Technology Development，Nanning 530007，Guangxi，China） |
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Abstract Abstract：In order to definite the pathogen of damping off at seeding stage of wax gourd from the Nanningregion of Guangxi，and screen effective control fungicides，this study isolated and purified the pathogen fromdamping off at seeding stage of wax gourd by tissue separation method，screend 14 kinds of fungicides，and evaluated their control effects．A fungus was isolated from damping off at seeding stage of wax gourd，and the strain was named as DGLK1．After pathogenicity tests，morphological observation and molecularidentification，it was confirmed that Rhizoctonia solani AG4HG-Ⅰwas the causal of damping off on wax gourdseeding，which is reported for the first time in China．Among 14 fungicides，450 g · L-1 prochloraz EWhad the strongest inhibitory effect with EC50 of 0.220 3 mg · L-1，followed by 500 g · L-1 iprodione SC，40%quintozene · carbcndazim WP，430 g · L-1 tebuconazole SC，75% trifloxystrobin · tebuconazole WDG．Theycould be used as candidate agents for field control on damping off on wax gourd seeding．
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Received: 29 November 2023
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