International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2015, Volume : 3, Issue : 5
First page : (152) Last page : (158)
Article doi: http://dx.doi.org/10.18782/2320-7051.2139
Seasonal incidence of spotted pod borer, Maruca vitrata (Fabricius) (Crambidae, Lepidoptera) on greengram under unsprayed conditions
1Sravani, D*., 2Mahalakshmi, M.S., 3Sandhyarani, C. and 4Kumari, V.P.
1Department of Entomology, Agricultural College (ANGRAU). Bapatla
2 Scientist, RARS, Lam Guntur
3Department of Entomology, Associate Professor, Agricultural College, Bapatla
4Department of Plant Pathology, Assistant Professor, Agricultural College, Bapatla
*Corresponding Author E-mail: sravanisravz99@gmail.com
Abstract
Field experiment was conducted to study the seasonal incidence of spotted pod borer, Maruca vitrata on green gram at Regional Agricultural Research Station, Lam, Guntur during rabi, 2014-2015. The larval incidence of M. vitrata was observed from 33 days after sowing (DAS) i.e., second week of November on green gram and continued till the end of the crop growth. The peak larval incidence was observed at 53 DAS i.e., first week of December coinciding with peak flowering and pod development stage, thereafter the larval population declined gradually. The pest has disappeared by the maturity stage of greengram. The weather parameters namely maximum temperature, minimum temperature, rainfall, morning relative humidity and evening relative humidity together accounted for 63.38 per cent significant variation in larval population of M. vitrata. However the correlation between the weather factors and M. vitrata larval population revealed that maximum temperature, minimum temperature and morning relative humidity showed positive influence where as rainfall and evening relative humidity showed negative influence. However, none of them were significant except maximum temperature.
Key words: Seasonal incidence, spotted pod borer, Maruca vitrata, % pod damage, green gram
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Sravani, D., Mahalakshmi, M.S., Rani, C.S. and Kumari, V.P., Seasonal incidence of spotted pod borer, Maruca vitrata (Fabricius) (Crambidae, Lepidoptera) on greengram under unsprayed conditions, Int. J. Pure App. Biosci. 3 (5): 152-158 (2015). http://dx.doi.org/10.18782/2320-7051.2139
