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Nargund, V. B.
- In Vitro Efficacy Fungicides against Causal Agents of Twister Disease of Onion
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Authors
Affiliations
1 Department of Plant Pathology, College of Agriculture, University of Agricultural Science, Dharwad (Karnataka), IN
1 Department of Plant Pathology, College of Agriculture, University of Agricultural Science, Dharwad (Karnataka), IN
Source
International Journal of Plant Protection, Vol 9, No 2 (2016), Pagination: 520-526Abstract
Twister disease of onion has become epidemic in coastal tract and other onion growing districts of Karnataka which caused heavy loss and its causal agents are C. gloeosporioides and F. oxysporum. Efforts were made to screen fungicides to know their efficacy of different fungicides at different concentrations under In vitro by poisoned food technique. Among the four non-systemic fungicides evaluated against C. gloeosporioides maximum inhibition was observed in chlorothalonil (42.60%). Among the seven systemic fungicides against F. oxysporum evaluated, hundred per cent inhibition of mycelial growth of C. gloeosporioides at all tested concentrations was observed in propiconazole, hexaconazole, tebuconazole and tricyclazole. Among the seven combi product fungicides evaluated carbendazim 12 per cent + iprodione 63 per cent (Quintal) inhibited maximum mycelial growth (95.43%). In vitro evaluation of fungicides revealed that among the four non-systemic fungicides evaluated, maximum inhibition of mycelial growth of F.oxysporum was observed in copper oxychloride (64.84%). Among six systemic fungicides evaluated, maximum inhibition of mycelial growth of F. oxysporum was observed in propiconazole (93.52%). Among the six combiproduct fungicides evaluated, hundred per cent inhibition of mycelial growth was observed in Saaf, Sprint and Vitavax power at all tested concentrations.Keywords
Twister Disease of Onion, In Vitro Evaluation, Fungicides, C. Gloeosporioides and F. oxysporum.
References
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- Prediction Models for Helicoverpa armigera (Hubner) Based on Abiotic Factors in Chickpea Ruling Variety JG-11
Abstract Views :174 |
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Authors
Affiliations
1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (Karnataka), IN
1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (Karnataka), IN
Source
International Journal of Plant Protection, Vol 10, No 2 (2017), Pagination: 344-348Abstract
Experiments were carried out on the weather based relationship of pod borer, Helicoverpa armigera (Hubner) during Rabi 2011-12 and 2012-13 at the Main Agricultural Research Station, Dharwad. The analysis comprised correlations between the pod damage with prevailing weekly meteorological parameters during 1, 2, 3 and 4 weeks lead time (prior) and same week of the observations revealed the following results. Forecasting model for per cent pod damage shown maximum temperature at 4 weeks lead time is consistently negatively and highly significant association with per cent pod damage in early sown crop. In case of normal and late sown crop, minimum temperature at 3 weeks lead time is consistently negatively and highly significant association with per cent pod damage by the prediction model.Keywords
Helicoverpa armigera, Weather Parameters, Pod Damage, Correlation, Regression, Forecasting.References
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