PJB-2007-234
ENHANCEMENT OF BIOCONTROL POTENTIAL OF PSEUDOMONAS AERUGINOSA AND PAECILOMYCES LILACINUS AGAINST ROOT ROT OF MUNGBEAN BY A MEDICINAL PLANT LAUNAEA NUDICAULIS L.
FARRUKH MANSOOR1, VIQAR SULTANA2 AND SYED EHTESHAMUL-HAQUE3
Abstract
Pseudomonas aeruginosa, a plant growth promoting rhizobacterium and Paecilomyces lilacinus, an egg parasite of root knot and cyst nematodes inhibited the growth of Macrophomina phaseolina, Fusarium solani and F. oxysporum in dual culture plate assay. Application of P. aeruginosa with a medicinal plant Launaea nudicaulis @ 0.5% as soil amendment resulted in maximum reduction in M. phaseolina infection on mungbean roots in screenhouse experiments. Launaea nudicaulis @ 0.5 and 1% w/w also significantly suppressed infection by M. phaseolina. Use of P. aeruginosa alone or with L. nudicaulis @ 0.1% resulted in complete control of Rhizoctonia solani infection. Significant control of F. solani was also achieved by the application of P. aeruginosa and P. lilacinus alone and by the combined use of P. aeruginosa and P. lilacinus with different dosages of L. nudicaulis. Greater plant height resulted when P. lilacinus was used alone followed by P. aeruginosa used with L. nudicaulis @ 0.1%. Significant increase in fresh shoot weight resulted when P. lilacinus and P. aeruginosa were used alone or P. aeruginosa used with L. nudicaulis @ 0.1%
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