PJB-2018-565
Role of rhizobia in suppressing the root rot and root knot disease of chili used alone or with Pseudomonas aeruginosa
Gulnaz Parveen, Faizah Urooj, Hafiza Asma Shafique, Afshan Rahman and Syed Ehteshamul Haque
Abstract
In this study biocontrol potential of rhizobia individually and in combination with Pseudomonas aeruginosa were evaluated against root rot and root-knot diseases of chilies. In vitro seven rhizobial isolates were tested, NFB-30 (Sinorhizobium sahelens) inhibited growth of all four test fungi Macrophomina phaseolina, Rhizoctonia solani, Fusarium oxysporum and F. solani and produced zone of inhibition of 10, 2, 2, and 11 mm respectively. Similarly seven isolates of Pseudomonas aeruginosa tested, PGPR-4, PGPR-6 and PGPR-11 suppressed the radial growth of all four fungi tested. In screen house experiments PGPR-6, PGPR-8, PGPR-11 and PGPR-37 showed significant decrease in infection of root rot fungi in chili. While NFB-28, NFB-30, NFB-31 & NFB-32 rhizobial isolates were found effective. In field experiments co-inoculation of different strains of PGPR with rhizobia showed better control of root rotting fungi and root knot nematode on chili than either component alone.
To Cite this article:
Parveen, G., F. Urooj, H.A. Shafique, A. Rahman and S.E. Haque. 2020. Role of rhizobia in suppressing the root rot and root knot disease of chili used alone or with Pseudomonas aeruginosa. Pak. J. Bot., 52(3): DOI: http://dx.doi.org/10.30848/PJB2020-3(42)
Download
