Abstract:

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 shown good effects on the three species of nematodes were effective broad-spectrum biological nematicides, and would had the widespread application of several major plant-parasitic nematodes.