STUDIES ON SEED-BORNE FUNGAL DISEASES OF SUNFLOWER AND THEIR MANAGEMENT WITH SPECIAL REFERENCE TO THE ALTERNARIA BLIGHT
| dc.contributor.advisor | SRIKANT KULKARNI | |
| dc.contributor.author | LAXMINARAYANA RAO M. S. | |
| dc.date.accessioned | 2019-06-21T08:08:32Z | |
| dc.date.available | 2019-06-21T08:08:32Z | |
| dc.date.issued | 2007-08-31 | |
| dc.description.abstract | Seed health testing of sunflower seed samples collected from different parts of Karnataka revealed the dominance of Altemaria helianthi and Rhizoctonia bataticola. Among the different seed health testing methods, modified P.O.A method was found to be good for detecting the seed-borne infection of A.helianthi, A.altemata and R.bataticola. Infected sunflower seeds exhibited poor germination and vigour. The pathogenic ability of seed-borne A.helianthi and R.bataticola was proved in seedling symptom test and transmission study. Altemaria helianthi, A.altemata and R.bataticola were confined to only pericarp and endosperm, but not embryo. In epidemiological studies, significant difference in blight incidence was noticed between three different seed inoculum levels at different dates of sowing and maximum incidence was observed in July second fortnight sown crop at 30 and 60 DAS at a seed inoculum level of 8000 conidia per ml. Seed dressing fungicide viz., Carbendazim + Iprodione, bioagent- Pseudomonas fluorescens and botanical Azadirachta indica were found most effective in eliminating seed-borne infections of Altemaria, Rhizoctonia and other fungal contaminations. In the integrated seed treatment options, though the seed treatment with Carbendazim + Iprodione at 0.3 per cent in Poly Ethylene Glycol along with foliar spray of hexaconazole recorded least per cent disease index, seed treatment with Carbendazim + Iprodione at 0.3 per cent in water along with foliar spray of hexaconazole was found most effective in managing Altemaria blight with maximum benefit cost ratio. In storage, seeds treated with Carbendazim + Iprodione at 0.3 per cent and stored in 700 gauge poly ethylene bags maintained satisfactory germination and seedling vigour up to ten months of storage. | en_US |
| dc.identifier.other | Th-8843 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810109485 | |
| dc.language.iso | en | en_US |
| dc.pages | 229 | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Banglore | en_US |
| dc.sub | Plant Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | STUDIES ON SEED-BORNE FUNGAL DISEASES OF SUNFLOWER AND THEIR MANAGEMENT WITH SPECIAL REFERENCE TO THE ALTERNARIA BLIGHT | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | STUDIES ON SEED-BORNE FUNGAL DISEASES OF SUNFLOWER AND THEIR MANAGEMENT WITH SPECIAL REFERENCE TO THE ALTERNARIA BLIGHT | en_US |
| dc.type | Thesis | en_US |