EPIDEMIOLOGY AND MANAGEMENT OF TURCICUM LEAF BLIGHT OF MAIZE CAUSED BY Exserohilum turcicum (Pass.) Leonard and Suggs
| dc.contributor.advisor | M.S. KULKARNI | |
| dc.contributor.author | SHARANAPPA I. HARLAPUR | |
| dc.date.accessioned | 2019-06-21T08:18:57Z | |
| dc.date.available | 2019-06-21T08:18:57Z | |
| dc.date.issued | 2007-08-31 | |
| dc.description.abstract | Turcicum leaf blight disease of maize caused by Exserohilum turcicum symptoms were recognised by long spindle shaped necrotic lesions with grey colour centre, immature and chaffy ears. The disease appeared in severe form in most of the maize growing areas of Kamataka. Crop loss estimation studies revealed that, avoidable grain and stover yield losses in susceptible genotype were to the extent of 52 and 40 per cent, respectively. Linear regression crop loss models were developed. Arabhavi isolate recorded high virulence. Sixty-five days old plants found vulnerability to infection. An incubation period of 28 hours was found ideal for more than 90 per cent spore germination. Saccharum arundinaceum Retz. was identified as a potential alternative host to E. turcicum and plays an important role in the epidemiology of TLB in Karnataka. Significantly maximum disease severity was noticed in crop sown on 16^ September. Crop sown between Februaiy and April found least affected. The weather factors, viz., minimum temperature (11.3-21.4®C), maximum temperature (26.3-29.4°C), relative humidity (58.7-84.5%) and rainfall (47.104 mm) were highly favourable for disease epidemic. The locations, viz., Arabhavi, Dharwad, Devihosur, Sankeshwar and Nagenahalli were identified as "hot spots' in Kamataka. Significant and positive correlation existed between rainfall and relative humidity with spore load. The genotypes, viz., Allrounder, IB-8501, Cargill 900M, Hi-Shell, NAC-6004, C-111, KH-517, Kaveri 235 and NK-6240 were identified as slow blighters. The disease was responsible for photosynthesis loss to the extent of 89.40 per cent in susceptible genotype. Fourteen inbrei lines were identified as highly resistant sources. The QPM genotypes HQFM-4 and HQPM-5 found highly resistant. Integration of 'olerant hybrid DMH-2 and seed treatment with carboxin power (2 g/kg) or combined seed treatment with Azospirillum sp. (25 g/kg) and T^choderma harzianum (6 g/kg) followed by three sprays with mancoze? (0.25%) was found to be the most effective IDM package for the management of TLB of maize. | en_US |
| dc.identifier.other | TH8844 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810109488 | |
| dc.language.iso | en | en_US |
| dc.pages | 265 | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Banglore | en_US |
| dc.rating.count | 5 | en |
| dc.sub | Plant Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | EPIDEMIOLOGY AND MANAGEMENT OF TURCICUM LEAF BLIGHT OF MAIZE CAUSED BY Exserohilum turcicum (Pass.) Leonard and Suggs | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | EPIDEMIOLOGY AND MANAGEMENT OF TURCICUM LEAF BLIGHT OF MAIZE CAUSED BY Exserohilum turcicum (Pass.) Leonard and Suggs | en_US |
| dc.type | Thesis | en_US |