Study on the control of cucumber fusarium wilt and its induced resistance by bacillus amyloliquefaciens 9-2
FAN Zongqiang
LI Xinran
FENG Jinghan
ZHENG Lixue
WANG Hui
PENG Xiangqian
CHEN Fang
Abstract：[Objective]To explore the control efficency and main mechanism of Bacillus amyloliquefaciae 9-2 against Fusarium wilt in cucumber.[Methods]Plate confrontation test and pot experiment were used to evaluate the effects of the 9-2 application on the pathogen mycelial morphology,activity of defense en-zymes in leaves and malondialdehyde content,and the disease index of cucumber Fusarium wilt.[Results]B.amyloliquefaciens 9-2 could significantly suppress the mycelium growth of F.oxysporum,and the mycelium around the inhibition zone showed uneven thickness,swelling,and breakage.The pot experi-ment showed that B.amyloliquefaciens 9-2 achieve the disease control efficiency against cucumber Fusar-ium wilt,reaching 69.11%.The plant height,stem diameter,fresh weight,dry weight of cucumber seedlings in 9-2 treatment were enhanced by 16.46%,6.37%,11.09%and 12.00%compared to control treatment,respectively.In addition,9-2 appliciation increased the activities of phenylalanine amylase,polyphenol oxidase,peroxidase and catalase,and decreased the content of malondialdehyde in cucumber leaves,the increase in the activity of the four defensive enzymes was more pronounced following pathogen inoculation.[Conclusion]B.amyloliquefaciens 9-2 can suppress the pathogen growth and induce disease resistance of cucumber,effectively controlling cucumber Fusarium wilt.
Keywords：B.amyloliquefaciens9-2cucumber Fusarium wiltinduced resistancebiological control
Publication Date：2025-08-01
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：8( 625-632 )