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EFFECT OF ORGANIC AMENDMENTS ON THE EFFICACY OF PSEUDOMONAS AERUGINOSA IN THE CONTROL OF ROOT ROT DISEASE OF SUNFLOWER

SYED EHTESHAMUL-HAQUE, M. JAVED ZAKI, AHSAN A. VAHlDY* AND ABDUL GHAFFAR

Abstract: Soil amendment with neem seed cake, cotton seed cake, Datura fastuosa and Steochospermum marginatum significantly (p<0.05) reduced Fusarium solani whereas neem seed cake and cotton seed cake were effective against Macrophomina phaseolina and Rhizoctonia solani, while Steochospermum marginatum and D. fastuosa against Rhizoctonia solani infection on sunflower roots. Pseudomonas aeruginosa, the plant growth promoting bacterium significantly controlled root rot disease of sunflower caused by M. phaseolina, R. solani and F. solani. Use of P. aeruginosa with neem seed cake and S. marginatum produced greater fresh weight of shoot and plant height respectively as compared to their separate use.

Department of Botany, University of Karachi, Karachi-75270, Pakistan.
M.A.H.Q. Biological Research Centre, University of Karachi, Karachi-75270, Pakistan.