甜瓜蔓枯病病原菌鉴定及拮抗菌筛选

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中图分类号：Q93-335 文献标志码：A 文章编号：1008-1038（2026）03-0045-08

DOI： 10.19590/j.cnki.1008-1038.2026.03.008

Identification of Pathogen Causing Melon Gummy Stem Blight and Screening of Antagonistic Bacteria

ZHOU Shirong1， LI Yang²， XING Kun 2 ， ZHANG Qingong？ （1.Linyi County Agricultural and Rural Bureau，Yuncheng O441O1， China; 2. Colege of Plant Protection， Shanxi Agricultural University， Taiyuan O3OO31， China; 3.Linyi County Jiaobei Town People's Government， Yuncheng O44106， China）

Abstract：Gummy stemblight isone of themain diseasesof cucurbit crops，which seriouslyaffcts thequality and yield of melons.To clarify the species of pathogens causing gummy stem blight in the main melonproducing areas of Xinzhou city，Shanxi province，this study carried out isolation and identification of the pathogens.Antagonistic strains were isolated and screened from the rhizosphere soil of healthy melons，the species ofthe strains were identified by combining 16S rRNA sequence analysis，and their biocontrol effects were evaluated through pot experiments.The results showed that the pathogen causing melon gummy stem blight in this region was Stagonosporopsis cucurbitacearum. Five strains（XJ18， XJ10， XJ2，XJ5，and XJ9） obtained by screening had good antagonistic effectsagainst the pathogen，with inhibition ratesof 63.40% ， 61.67%， 60.40% ， 58.83% ，and 55.14% respectively，and they were identified as B. halotolerans，B. amyloliquefaciens，B.mojavensis，B.velezensis，and Bacilus rugosus respectively.Pot experiments showed that XJ18 and XJ2 had the most significant control effects，with control efficiencies of 72.84% and 69.43% （20 respectively.Theabove results provideda reliable scientific basis for the biological control of melon gummy stem blight.

Keywords：Gummy stem blight;pathogens; biocontrol bacteria; Stagonosporopsiscucurbitacearum;biological control

甜瓜（CucumismeloL.）属葫芦科甜瓜属一年生蔓性草本植物I，在世界范围内都有种植，在我国各地广泛栽培2。（剩余10403字）