The Bio-control of Meloidogyne incognita by Antagonistic Microorganism in Cucumber

The strains of Antagonistic Microorganism in cucumber gained by striking down,preventing,potting culture in greenhouse and block experiment on the field were selected and tested their control for the root knot nematode(Meloidogyne incognita) and the bio-control mechanism for the better strains among them was studied.The result was showed: in vitro condition,S506,Cm05 and Ms2 are the better strains for control root knot nematode and the correction death rates of nematode by 3 strains were over 30%,the best one,S506 reached to 48.8%.The strain including S506 and Cm05 was the best combination for preventing nematode. The S506 controlling the nematode under the potting culture in greenhouse or block planting on the field was in the highest effect after continuous cropping for 4,8,and 11 years respectively.The correction death rates of control nematode reached to 85.29 and it is the higher than Avermmectin(only 14.89%).The main bio-control substance of.S506 was produced from metabolism of cell outside.