International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 2
First page : (801) Last page : (806)
Article doi: http://dx.doi.org/10.18782/2320-7051.2500
Population Dynamics of Pink Bollworm Pectinophora gossypiella (Saunders) in Cotton Crop
Shravan Kumar Verma*, D.R. Singh, Jeewesh Singh, Saurabh Singh and Nirvesh Yadav
C.S. Azad University of Agriculture & Technology, Kanpur, U.P., India
*Corresponding Author E-mail: pawanjrf85@gmail.com
Received: 24.01.2017 | Revised: 8.02.2017 | Accepted: 10.02.2017
ABSTRACT
The pink bollworm, Pectinophora gossypiella infestation on flowers found higher in 2nd week of September with intensity of 6 and 7 larvae/ 30 flowers respectively during both years. While, peak larval population on bolls was recorded in the 2nd week of September with intensity of 7 larvae/30 bolls in 2012 and in 2013 peak infestation was recorded in 3rd week of September with intensity of 8 larvae/ 30 bolls. Larval population on flowers shows negative correlation with rainfall and age of crop and shows, positive correlation with maximum, minimum (temperatures) and morning, evening (relative humidity) during kharif 2012 while, in kharif 2013, larval population on flowers shows negative correlation with age of crop, maximum, minimum (temperatures) and evening relative humidity, while shows, positive correlation with morning relative humidity and rain fall. In kharif 2012, larval population on bolls shows negative correlation with rain fall, but shows positive correlation with age of crop, maximum, minimum (temperatures) and morning, evening (relative humidity), while in kharif 2013 shows negative correlation with age of crop, maximum, minimum (temperatures) and rain fall, but shows positive correlation with morning, evening (relative humidity). In kharif 2012 open boll damage to be recorded 28.88 per cent whereas, open locule damage to be recorded 17.22 per cent while, in kharif 2013 open boll damage to be recorded 29.99 per cent whereas, open locule damage to be recorded 18.05 per cent.
Key words: Kharif, Cotton Crop, Larval, Pink Bollworm
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Verma, S.K., Singh, D.R., Singh, J., Singh, S. and Yadav, N., Population Dynamics of Pink Bollworm Pectinophora gossypiella (Saunders) in Cotton Crop, Int. J. Pure App. Biosci.5(2): 801-806 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2500
