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《Journal of Nanjing Agricultural University》 2009-01
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Biological control of Meloidogyne incognita by combination of Paecilomyces lilacinus and Actinomycetes spp.

WANG Bo,LI Hong-mei,WANG Bi,FU Peng,LIN Mao-song*(College of Plant Protection,Nanjing Agricultural University,Nanjing 210095,China)  
Biocontrol agent Paecilomyces lilacinus can colonize the eggs of Meloidogyne spp.,while the fermentation products from Actinomycetes spp.can kill the second stage juveniles of root-knot nematodes.Hereby the antagonistic characters of these two biocontrol agents and their combinations for controlling M.incognita were studied.No inhibition phenomena on mycelia growth were observed in the antagonistic tests by cylinder plate methods between P.lilacinus strains PL1 and PL2 with Actinomycetes spp.strains LH117 and LH121,while weak inhibition on mycelia growth of PL2 was observed when diluting the supernatant of fermentation from Actinomycetes spp.strain LH121 into the media,and the inhibition rate was 14.5%.In vitro bioassays,the effects of inhibiting eggs hatching and killing second stage juveniles of M.incognita by four combined P.lilacinus and Actinomycetes spp.treatments were significantly higher than those with single strain treatments.The maximum inhibition rate to egg hatching and mortality of the second stage juveniles were 66.6% and 78.0%,respectively.In greenhouse pot experiments,the combination of P.lilacinus strain PL1 with Actinomycetes spp.strain LH117 produced the highest biocontrol effects,with 68.7% of root knots and 58.4% of egg masses on tomato plants reduced when compared to the control test.The biocontrol effects on M.incognita with the combinations of strains from P.lilacinus and Actinomycetes spp.were significantly higher than those with the single strain treatments,which may closely related to the antagonistic characters between biocontrol strains.
【Fund】: 农业部农业公益性行业科研专项项目(nyhyzx07-050)
【CateGory Index】: S476
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