Biological control of sheath-blight of rice in India with antagonistic bacteria

• Published in: Plant and soil Vol. 119; no. 2; pp. 325 - 330
• Main Authors: DEVI, T. VASANTHA, VIZHI, R. MALAR, SAKTHIVEL, N., GNANAMANICKAM, S.S.
• Format: Journal Article
• Language: English
• Published: Dordrecht Kluwer Academic Publishers 01-10-1989; Springer
• Subjects: antagonism; antagonisme; antagonismo; Bacteria; bacterie; Biological and medical sciences; Biological control; Control; control biologico; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; Grains; inde; india; Lesions; lutte biologique; oryza; Oryza sativa; Phytopathology. Animal pests. Plant and forest protection; Plant diseases; Plants; Pseudomonas fluorescens; Rhizoctonia; Rhizoctonia solani; rhizosphere; Rice; Sclerotia; Viability; India; Monocotyledones; Mycosis; Biological control; Tropical crop; Phytopathogen; Antibiosis; Cereal crop; India; Fungi; Infection; Oryza sativa; Rhizosphere; Asia; Gramineae; Bacterial inoculation; Angiospermae; Rhizoctonia solani; Spermatophyta; Fungi Imperfecti; Greenhouse study; Thallophyta
• ISSN: 0032-079X; 1573-5036
• DOI: 10.1007/BF02370425

Strains of fluorescent and nonfluorescent bacteria that were isolated from rice rhizospheres of Southern India and showed antagonism towards Rhizoctonia solani were evaluated for biological control of rice sheath-blight (ShB). Efficient strains of bacteria inhibited mycelial growth of R. solani, affected sclerotial viability in vitro and protected IR 20 and TKM 9 rice seedlings from infection by R. solani in greenhouse tests. Pretreatment of sclero tia in bacterial suspensions resulted in reductions in ShB lesion sizes up to 31 to 44% in IR20 and 58 to 74% in TKM 9 rice. In field plots, IR 50 and TKM 9 rice plants raised from bacterized seeds had 65 to 72% less ShB than those plants from untreated seeds.