Sr18生防制剂的杀线虫谱研究

The Nematicidal Spectrum of Bio-nematicides from Filamentous Fungus Sr18

为检测Sr18生防制剂的杀线虫谱,通过室内法测定了Sr18的4种不同调配制剂S01-S04对南方根结线虫、大豆孢囊线虫和松材线虫的作用效果。结果表明:4种生防调配制剂对南方根结线虫的致死效果最强,稀释至8倍的校正死亡率均达到100%;对大豆孢囊线虫,生防制剂S01和S03(原始pH制剂)16倍稀释液的校正死亡率均可达到85%以上;而对松材线虫的致死率高的是S02和S04(中性pH制剂),8倍稀释液仍可达到100%。实验证实Sr18生防制剂是一种有效的广谱生物源杀线剂,在重要植物寄生线虫病害的生物防治方面具有广阔的应用前景。

For finding out the nematicidal spectrum of bio-nematicides from filamentous fungus Syncephalastrum racemosum（Sr18）,in-vitro methods were developed to test the four different preparations of bio-nematicides,S01-S04,affecting nematode mobility of three nematodes including root knot nematode（RKN）,soybean cyst nematode（SCN） and pine wood nematode（PWN）.A serious of acute toxicity tests exhibited that the bio-nematicides were effective strongly to RKN,Meloidogyne incognita,and all of 8× diluted concentrations had corrected mortality of 100% differing from CK significantly;to SCN,Heterodera glycines,16×dilution of S01 and S03（the two nematicides with original pH） had corrected mortality of above 85%;on the contrary with SCN,S02 and S04（the two neutral samples） had high nematicidal effects on PWN,Bursaphelenchus xylophilus,100% corrected mortality from original concentrations to those at 8 × diluted.Bio-nematicides from Sr18 showed good effects on the three species of nematodes which had effective broad-spectrum biological nematicides,and would had the widespread application of several major plant-parasitic nematodes.