MOLECULAR CHARACTERIZATION, EPIDEMIOLOGY AND MANAGEMENT OF TOMATO LEAF CURL VIRUS (ToLCV) IN NORTHERN KARNATAKA
| dc.contributor.advisor | M. S. PATIL | |
| dc.contributor.author | ANJANEYA REDDY, B, | |
| dc.date.accessioned | 2019-06-21T07:42:05Z | |
| dc.date.available | 2019-06-21T07:42:05Z | |
| dc.date.issued | 2007-08-31 | |
| dc.description.abstract | Tomato leaf curl virus (ToLCV) disease is one of the most important viral diseases of tomato and causes substantial losses every year. Survey results revealed that ToLCV was present in all the fields visited in Belgaum, Dharwad, Gadag and Haveri districts. The disease incidence ranged from 4-00 per cent during rabi 2005 and 60-100 per cent in summer 2006. A few natural weed hosts inz., Parthenium hysterophorus (Parthenium), Euphorbia geniculata (Bhedi soppu), Ageratum conyzoides (Oorala gida), Acanthospermum hispidum (Kadale mullu), Blainvillea rhomboidea (Ervapalha) Cass. and Lachnera pusilla L. showed positive for ToLCV infection in the PCR detection. The results of the cloning and nucleotide sequencing of the coat protein gene revealed that isolates from Belgaum, Dharwad and Haveri showed 95.10 to 99.60 per cent homology indicating they are closely related to each other. However, these isolates showed wide variation of upto 46.50 per cent divergence with some of the isolates of North Western Indian ToLCV 17 Nasik (AJ 10356) and North Indian ToLCV 19.Patna (AJ 810358). The survey, bioassay and RAPD-PCR analysis of whitefly vector revealed the prevalence of Bemisia tabaci-B-biotype in addition to the indigenous type in Dharwad region. Tomato planted during August and November showed slow progress of the disease and less incidence as there was high humidity and high rainfall, which suppress the vector activities whereas, maximum incidence was recorded in February and May planted crop. In the management of disease the sequential application of Imidachloprid (0.005%) - Triazophos (0.15%)-Thiamethaxam (0.05%)- Econeem (0.5%) found effective with low disease incidence and better yield. The Clerodendron inermis and Glyricidia leaf extract application also found effective. In the field screening cultivars such as Nandi, Vybhav, Sankranti, and hybrids Utsav, HY 558, HY 530, NS-719 and NS-563 showed resistance reaction and the commonly cultivated Megha showed susceptible reaction. | en_US |
| dc.identifier.other | TH8838 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810109481 | |
| dc.language.iso | en | en_US |
| dc.pages | 253 | 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 | MOLECULAR CHARACTERIZATION, EPIDEMIOLOGY AND MANAGEMENT OF TOMATO LEAF CURL VIRUS (ToLCV) IN NORTHERN KARNATAKA | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | MOLECULAR CHARACTERIZATION, EPIDEMIOLOGY AND MANAGEMENT OF TOMATO LEAF CURL VIRUS (ToLCV) IN NORTHERN KARNATAKA | en_US |
| dc.type | Thesis | en_US |