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从广西蔬菜地分离到359株细菌菌株,用其细菌菌悬液和发酵上清液对南方根结线虫Meloidogyne incoqnita的二龄幼虫进行处理,评价其对南方根结线虫的毒力.结果显示,有336株菌株的菌悬液对南方根结线虫二龄幼虫具有杀伤能力,其中49株菌株对南方根结线虫的室内校正死亡率达60%以上;用细菌发酵上清液处理二龄幼虫,也表现出对幼虫活性的抑制作用,48h后有8株菌株发酵上清液原液校正死亡率达80.00%以上.
359 bacterial strains were isolated from vegetables in Guangxi and the second instar larvae of Meloidogyne incoqnita were treated with their bacterial suspension and fermentation supernatant to evaluate their virulence against Meloidogyne incoqnita.The results showed that, The bacterial suspension of 336 isolates had the lethal effect on the second instar larvae of Meloidogyne incognita, of which 49 strains were more than 60% correct for indoor root-knot nematode. The second-instar larvae were treated with bacterial fermentation supernatant, Also showed inhibitory effect on larval activity. After 48h, the corrected mortality rate of 8 strains of fermentation supernatant stock reached more than 80.00%.