Preliminary Investigations on Biocontrol of Sucking Pests of Okra by Plant Growth Promoting Rhizobacteria
Certain PGPR isolates were tested to study their biocontrol ability against aphid (Aphis gossypii Glover) and leafhopper (Amrasca biguttula biguttula Ishida) pests of okra. All the four PGPR isolates reduced the incidence of pests remarkably, out of which Pseudomonas B 25 was found to be the most efficient biocontrol agent against both pests. The populations of aphids and leafhoppers were reduced by about 79 and 81 per cent, respectively, due to spraying with B 25 isolate. The okra yield was improved by over 53 per cent when compared to the uninoculated control. The mechanisms inyolved in biocontrol are being investigated
Aphids, Leafhoppers, Okra, Plant Growth Promoting Rhizobacteria
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