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Seasonal Incidence of the Sucking Pest and Lady Bird Beetle on Bt Cotton
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Seasonal incidence of sucking pests in Kharif 2016 at College of Agriculture, Dhule revealed that, the leafhopper incidence reached its peak activity during the second week of October (6.64 leafhoppers/3 leaves/plant), whereas, the peak incidence of aphids was noticed in the third week of October (8.82 aphids/3 leaves/plant). The peak incidence of the whiteflies was recorded during the fourth week of October (8.02 whiteflies/3 leaves/plant). The peak incidence of the thrips was recorded during the third week of October (6.76 thrips/3 leaves/plant). The activity of predator lady bird beetle was at its peak during first week of October (2.94 lady bird beetles/plant), which is directly related with the activity of the sucking pest in field. The correlation between incidence of leaf hoppers (r = 0.205), aphids (r = 0.174), whiteflies (r = 0.206), thrips (r = 0.167), was positively non-significant with maximum temperature (Tmax ). The minimum temperature (Tmin ) showed negative significant correlation with whiteflies (r = -0.640**), thrips (r =-0.464*) and negative non-significant correlation with leafhoppers(r =-0.411) and aphids (r = -0.3111). The morning relative humidity (MRH) showed negative significant correlation with occurrence of whiteflies (r = -0.440*) and negative non significant correlation with occurrence of the leafhoppers(r = -0.123), aphids (r = -0.101) and thrips (r = -0.184). Similarly, the evening humidity (ERH) showed negative non significant correlation with the pests such as leafhoppers(r = -0.038), aphids (r = -0.021), whiteflies (r = -0.166) and thrips (r = -0.085) during Kharif 2016 season. The rainfall had negatively non significant effect at 5 per cent level of significance with leafhoppers, aphids, whitefly and thrips.
Keywords
Weather Parameters, Sucking Pest, Bt Cotton.
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- Anonymous (2016). The Cotton Corporation of India Ltd.
- Bhede, B.V. (2003).Studies on population dynamics and bioefficacy of newer insecticides against major pests of chilli M.Sc. (Ag.) Thesis, MKV, Parbhani (M.S.) India.
- Desai, H.R., Maisuria, I.M., Patel, C.J., Solanki, V.Y., Bhadsuria, S. and Kumar, V. (2009).Incidence of different pests in Bt and non Bt cotton hybrid in relation to weather parameters south Gujarat condition. National Symposium on “Bt-cotton: Oppurtunities and Prospects” at CICR, Nagpur. November 17-18, 2009: 126-127.
- Dhaka, S.R. and Pareek, B.L. (2008).Weather factor cotton under semi arid agro-ecosystem. Indian J. Ento.,70(2) : 157-163.
- Mayee, C.D. and Rao, M.R.K. (2002).Current cotton production and protection scenarios including G.M. Cotton. Agrolook, April-June, 14-20.
- More, D.G., Gitte, A.N., Bhosale, B.B., Awaz, H.B. and Pawar, S.V. (2009).Population dynamics of different pests of Bt cotton under rainfed condition. National Symposium on “Bt cotton: Oppurtunities and Prospects” at CICR, Nagpur. November 17-18, 2009: 123
- Mohapatra, L.N. (2008).Population dynamics of sucking pests in Hirsutum cotton and influence of weather parameters on its incidence in western Orissa. J. Cotton Res. Dev., 22 (2): 192-194
- Parsai, S.K. and Shastry, P.P. (2009).Seasonal incidence of key pests and their enemies on cotton. National Symposium on “Bt-cotton: Opportunietes and Prospects” at CICR, Nagpur. November 17-18, 2009: 125-126.
- Prasad, N.V.V.S.D., Rao, N.H.P. and Mahalakshmi, M.S. (2008). Population dynamics of major sucking pests infesting cotton and their relation to weather parameters. J. Cotton Res. Dev., 22(1): 85-90.
- Purohit, D., Ameta D.P. and Sarang, S.S. (2006).Seasonal incidence of major insect pests of cotton and their natural enemies. Pestology, 30(12): 24-29.
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