Biocontrol of Soil Borne Fungi in Tomato Crop by Using Beneficial Bacillus subtilis Strains

被引：0

作者：

Constantinescu, F. ^{[1
]}

Tomescu, A. ^{[2
]}

Sesan, T. E. ^{[3
]}

Stirbu, P. M. ^{[4
]}

机构：

[1] Res Inst Plant Protect, Bucharest, Romania

[2] Biotech Fdn, Bucharest, Romania

[3] Fac Biol, Bucharest, Romania

[4] Dow AgroSci, Paris, France

来源：

III INTERNATIONAL SYMPOSIUM ON TOMATO DISEASES | 2011年 / 914卷

关键词：

biocontrol; Fusarium oxysporum f. sp radicis-lycopersici; Pythium ultimum; Bacillus subtilis;

D O I：

暂无

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Biological control of soil borne diseases by using microbial pesticides that suppress plant pathogens is an attractive tool for horti- and agriculture. Fusarium oxysporum f. sp. radicis-lycopersici (Jarvis and Shoemaker) and Pythium ultimum (Trow.) occurs frequently in greenhouse conditions (mainly at 25-27 degrees C and 80-100% soil humidity) affecting tomato seedlings and causing foot and root rot. Biocontrol of phytopathogenic fungi by Bacillus subtilis (Ehrenberg) Cohn is accomplished by antibiosis, induced systemic resistance, competition for nutrients and niches or plant growth promotion. In this study, five Bacillus subtilis strains, Bs57, Bs45, Bs30, BsA1 and Bs98, were selected for antagonistic activity against Fusarium oxysporum f. sp. radicis-lycopersici and Pythium ultimum in vitro and analyzed for their biocontrol ability in vivo in greenhouse conditions. The results showed that the highest efficacy, equal with the chemical control, thiram 70% (4 g/kg), was conferred by strains Bs30 against P. ultimum (83%) and Bs98 against F. oxysporum (88%). These two strains significantly reduced the disease symptoms and also promoted the growth of the tomato plants.

引用

页码：381 / 384

页数：4

共 4 条

[1] Biocontrol of Rhizoctonia solani damping-off of tomato with Bacillus subtilis RB14 [J].