EFFICIENCY OF SOME BACTERIAL STRAINS FOR CONTROLLING LIMB ROT DISEASE OF PEANUT GROWN IN A SANDY SOIL

Document Type : Original Article

Authors

1 Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, Egypt

2 Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt

Abstract

Four biocontrol agents, Bacillus subtills, Bacillus amyloliquefaciens, Pseudomonas synxantha and Brevibacterium otitidis were tested individually and/or in combined mixtures for suppression of Rhizoctonia solani on peanut. All tested bacteria moderately inhibited the growth of R. solani. B. amyloliquefaciens was the best for inhibiting growth. In a field experiment, combined mixture of the four tested bacteria completely suppressed incidence disease also combined mixtures of B. ainyloliquefaciens and Breyibacterium otitidis or Pseudomonas synxantha and Srevibacterium otitidis gave same result. Dehydrogenase and nitrogenase activities, root nodulation and peanut biomass yield were also determined. All tested strains increased plant parameters, however B. amynoliquefaciens and B. subtilis were the most effective.