Screening of Antagonistic Bacteria against Potato Bacterial Wilt and Study on Its Control Effect in Greenhouse
Bacterial wilt of potato is a destructive soil-borne disease caused by Ralstonia solanacearum.Screening antagonistic bacteria against pathogen is a vital work for the biocontrol of potato bacterial wilt.Six isolates with good inhibitory effect on three R.solanacearum strains of potato,tomato and tobacco were isolated from the rhizosphere soil of healthy potato,tomato,eggplant and pepper plants.They were identified as Lysinibacillus sp.,Pseudomonas sp.and Kosakonia sp.through molecular detection,and it had the ability to produce protease,siderophor and biofilm,respectively.In greenhouse,strain FC-17 significantly reduced disease incidence by 79.46％and 70.83％on potato cultivars"Longshu 7"and"Atlantic",respectively,indicating good potential for biocontrol of potato bacterial wilt.
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