International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (287) Last page : (292)
Article doi: http://dx.doi.org/10.18782/2320-7051.2968
Seasonal Incidence and Effect of Abiotic Factors on Population Dynamics of Tobacco Caterpillar, Spodoptera litura (Fabricius) on Groundnut (Arachis hypogaea L.) During Rabi Season
T. Naresh1*, A. Ramakrishna Rao2, T. Murali Krishna2, S. Khayum Ahammed4,
K. Devaki2 and P. Sumathi3
1Department of Entomology, S.V. Agricultural College,
2Department of Entomology, Regional Agricultural Research Station,
3Department of Statistics & Mathematics, S.V. Agricultural College, Tirupati,
4Department of Plant Pathology, RARS, Nandyal, Acharya N.G Ranga Agricultural University
*Corresponding Author E-mail: t.naresh0099@gmail.com
Received: 10.05.2017 | Revised: 21.05.2017 | Accepted: 23.05.2017
ABSTRACT
Seasonal incidence of Spodoptera litura in groundnut was studied during rabi, 2015-16 at dry land farm, S.V. Agricultural College, Tirupati in two groundnut varieties i.e., Dharani and Kadiri-6 (K6). The results indicated that, the incidence of S. litura on groundnut was observed from 50th standard week of 2015 to 11th standard week of 2016. Foliar damage was high in November second fortnight sown crop (D1) compared to December first (D2), December second (D3) and January first fortnight (D4) sown crops during 50th standard week of 2015 to 6th standard week of 2016. Weather parameters like maximum temperature, minimum temperature, sun shine hours and wind speed showed negative correlation with S. litura incidence and morning and evening relative humidity showed positive correlation with S. litura damage in groundnut. Among the six weather parameters, Max and minimum temperature and morning and evening relative humidity showed significant influence on S. litura incidence in two cultivars of groundnut (Dharani and K-6) in D1 D2 D3 and D4 sown crops. Six weather parameters viz., maximum temperature, minimum temperature, morning relative humidity, evening relative humidity, sunshine hours and wind speed combinedly influenced S. litura damage to the extent of 86 per cent (R2= 0.86) and 84 percent (R2= 0.84) in groundnut cultivars Dharani and K-6 in D1 and in case of D2 incidence of S. litura influenced up to the extent of 88 per cent (R2=0.88), 87 per cent (R2=0.87) in Dharani and K-6 and in case of D3 incidence of S. litura influenced by weather parameters up to the extent of 63 per cent (R2=0.63), 65 per cent (R2=0.65) and in D4 33 per cent (R2=0.33), 35 per cent (R2=0.35) in Dharani and K-6 respectively.
Key words: Abiotic factors, Arachis hypogaea, Spodoptera litura.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Naresh, T., Rao, A. R, Krishna, T. M., Ahammed, S. K., Devaki, K. and Sumathi, P., Seasonal Incidence and Effect of Abiotic Factors on Population Dynamics of Tobacco Caterpillar, Spodoptera litura (Fabricius) on Groundnut (Arachis hypogaea L.) During Rabi Season, Int. J. Pure App. Biosci.5(5): 287-292 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2968
