BIOLOGICAL CONTROL OF RICE BLAST DISEASE WITH ANTAGONISTIC BACTERIA UNDER EGYPTIAN CONDITIONS | ||
| Egyptian Journal of Agricultural Research | ||
| Article 2, Volume 77, Issue 3, September 1999, Pages 995-1005 PDF (2.6 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1999.336961 | ||
| Author | ||
| ESSA A. SALEM | ||
| Plant Pathology Research Institute, Agricultural Research Center, Giza, Egypt | ||
| Abstract | ||
| Forty two bacterial isolates were isolated from rice leaves of different Egyptian rice cultivars and some other plants in 1995. Morphological characters of both colony and cell shape, reaction of Gram Staining and KOH test as preliminary identification tests showed that, most of the isolates belong to Bacillus app. and Pseudomonas spp. More confirmative identification tests are needed. Twenty isolates showed inhibitory effect against Pyricularia oryzae Cay., the causal organism of blast disease in both laboratory and greenhouse tests, sixteen isolates showed the highest mycelial reduction ranging from 53.6 to 40.5%. In greenhouse tests,all isolates were effective comparing with the check; however, 14 of them were effective for minimizing blast disease infection under all application methods (seed treatment, spray 3 DBI and 3 DAI).Seven isolates were more effective when used as seed treatment or sprayed 3 DB1. On the other hand, three other isolates were effective as seed treatment and spray 3 DAI. Regardless of the insufficient effect under laboratory test, some isolates showed satisfactory effect under greenhouse test. | ||
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