Screening and biological control effect of two antagonistic bacteria against banana fusarium wilt
Year: 2014
Type: article
Abstract: A field plot experiment was conducted to test the effects of application Bacillus subtilis BLG01 and BDF11screened from antagonistic Bacillus strains and liquid organic fertilizer(LOF) on the growth of banana plant, disease severity index(DSI) of fusarium wilt, survival ability of FOC and cultivable bacteria population in rhizosphere of banana. Indoor testing showed that BLG01 and BDF11 restrained the mycelial growth of FOC by 70.4% and 77.2% on PDA plate. The results of field experiment showed that, after 100 days of transplanting, all treatments could increase the growth of banana and control efficiencies compared to control treatment. B. subtilis BLG01, BDF11 and LOF together had the biggest control efficiency on banana fusarium wilt. In the optimum treatment, the plant height, stem thickness, fresh weight of aerial and underground part of banana significantly increased, combined DSI decreased by 45.39%-65.87%, the number of FOC decreased significantly by 40.5%-50.1%%, while the number of bacteria in rhizosphere increased significantly by 25.8%-32.8%. The number of FOC was significantly negatively correlated to cultured bacteria in rhizosphere, while was significantly positively correlated to DSI. The results indicate that applying B. subtilis BLG01 and BDF11 with LOF can effectively promote the growth of banana, decrease the number of FOC and improve cultivable bacteria population at rhizosphere of banana, and increase the control effect on banana fusarium wilt, and it shows wide application prospect.
Source: Guangdong nongye kexue
Author: Dai Qing-don
Institution: Hainan Agricultural School
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $726
OpenAlex ID: W2385327059