National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Effect of fungicides, plant extracts and biocontrol agents against brown leaf spot of paddy were evaluated under laboratory conditions at Department of Plant Pathology, College of Agriculture, V. C. Farm, Mandya, Karnataka, during 2015-16. The fungicides were evaluated at 5 different concentrations viz., 50, 100, 150, 200 and 250 ppm using poison food technique. The results revealed that, propiconazole25% EC to be statistically significant over the other fungicides tested, with 72.05% mycelia growth inhibition at 50 ppm concentration, and 100% mycelial growth inhibition at 100, 150, 200, and 250ppm concentrations. However hexaconazole 5% SC inhibited 72.95% and 74.23% mycelial growth at 50 and 100 ppm respectively, however, 100% mycelial growth inhibition was recorded at 150, 200 and 250 ppm concentration, respectively. All the nine plant extracts tested suppressed the mycelial growth of the pathogen. However, garlic clove extract proved to be the best which recorded 100% mycelial growth at all the 3 concentrations tested. This was followed by the marigold leaf extract which recorded 82.24, 85.55 and 88.16% mycelial growth inhibition at 5, 10 and 15 per cent concentration, respectively. Dual culture technique was used to evaluate the antagonistic activities of the bioagents. Maximum mycelial growth inhibition of 48.49% was recorded by Trichoderma viride whereas, T. harzianum and Pseudomonas fluorescens recorded 40.76% and 27.57% inhibition, respectively.
Citations |
 |
 |
 |
 |
