tailieunhanh - Status of brown leaf spot of paddy in cauvery command areas of Mandya District, Karnataka, India

Roving survey was conducted to record the disease severity of brown leaf spot of rice during kharif 2015 in paddy growing Cauvery command areas like Mandya, Srirangapatna, Krishnarajapete, Pandavapura, Maddur and Malavalli. Disease scoring was done by employing SES scale developed by IRRI in symptoms in the field were recognized by the greyish brown spots. On leaves, typical spots are brown in color with grey to whitish center, cylindrical to oval in shape resembling sesame seed, usually with yellow halo, while young spots are small, circular and appear as dark brown to purplish brown dots. The results revealed that the disease was prevalent in all the paddy growing areas of Mandya. In 6 taluks of Cauvery command areas surveyed the disease severity, ranged from to per cent. However highest average disease severity was recorded in Mandya taluk with per cent followed by Malavalli taluk with per cent. Lowest average disease severity was recorded in Maddur taluk () followed by Srirangapatna taluk with per cent. Among the villages surveyed average highest per cent disease severity was recorded in Holalu with per cent followed by Mallanaya kanakatte per cent and Hulikere with per cent of Mandyataluk. However lowest average disease severity was recorded in Sannakothannuru and Melukote villages with per cent followed by Konanahalli village ( %) of Pandavapurataluk. | Status of brown leaf spot of paddy in cauvery command areas of Mandya District, Karnataka, India

• Nông nghiệp
• Brown leaf spot
• Disease severity
• Cauvery command area
• Brown leaf spot of paddy
• Rice during kharif 2015
• Paramyrothecium roridum
• Plant pathogen
• Phylogenetic analysis
• Brown leaf spot of mulberry
• Screening and MTU 1001
• Flooded conditions
• Brown leaf spot disease
• Performance of paddy varieties
• Economic yield
• Chemical fungicides against rice
• Rice brown leaf spot disease caused
• Bipolaris Oryzae
• Against rice brown leaf
• Light and nutrition
• Radial growth
• Dry mycelial weight
• Brown colored conidia
• Plant extracts
• Biocontrol agents
• Mycelial growth inhibition
• Biocontrol agents against
• Eye leaf spot
• Drechslera australiensis
• Pleomele reflexa var gracilis
• Pleomele reflexa var variegata
• Dark brown margin