Evaluation of biocontrol potential of a bacterial strain NCD-2 against Cotton Verticil-(lium) wilt in field trials

Shezeng Li, Lu Xiuyun, Ma Ping, Shengguo Gao, Liu Gan

Acta Phytopathologica Sinica · 2005 · 17 citations · 0 references

Concepts

Abstract

NCD-2,a bacterial strain againstVerticillium dahliaeK leb.,was isolated from cotton rhizosphere.The Verticillium wilt of cotton was suppressed by using NCD-2 to an average of 85.4% in the field plot during 2 years and 51.2%-60.6% in the field trial during 3 years.Simultaneously,cotton yield(includ ing its cons-titutors: such as bollweight,lint percentage,lint index and seed index) and length of fiberwere increased.The pathoge-nicity of strain NCD-2 to 7 major crops(wheat,maize,cotton,potato,cucumber,eggplant and soybean) was investigated and no infections or inhibition on their seedling rate,growth and developmentwas found.All these re-sults suggested that strain NCD-2 was a potential bacterial strain to control Verticillium wilt of cotton.The strain NCD-2 was identified asBacillus subtiliswith API50 CH Striper and API20 E Striper.