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| Control Efficacy of Streptomyces roseoflavus on Root-knot Nematode and Its Influence on Soil Microbiota |
| QIAO Dan-na1，ZHANG Yan-jie1，LI Hua-yi1，SHEN Feng-ying1，2，LI Zhen-zhen1，3，LIU Da-qun1*，LI Ya-ning1* |
| 1College of Plant Protection，Agricultural University of Hebei；Biological Control Center of Plant Diseases and Plant Pests of Hebei Province；National Engineering Research Center for Agriculture in Northern Mountainous Areas，Baoding 071001，Hebei，China；2Hebei North College，Zhangjiakou 075000，Hebei，China；3Agricultural Bureau of Xingtai City，Xingtai 054001，Hebei，China |
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Abstract Both fermentation broth and solid state fermentation of Streptomyces roseoflavus Menmyco-93-63 isolate were used for controlling tomato and cucumber root-knot nematode. The control efficacy and its effect on soil microbiota were studied. The results showed that the control efficacy of the treatment on cucumber and tomato by 1 V∶200 V solid state fermentation of Men-myco-93-63 were 65.62% and 57.69%，respectively. The application of bio-agents has increased the number of bacteria and actinomyces in soil by 19.57% and 316.67%，respectively，while the number of fungi reduced by 28.57%. The three kinds of the cultivable soil microorganism raised from 7.40×106 cfu·g-1 to 16.75×106 cfu·g-1，amount to 126.35%.
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Received: 16 January 2014
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