Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Seasonal Incidence of the Sucking Pest and Lady Bird Beetle on Bt Cotton


Affiliations
1 College of Agriculture, Dhule (M.S.), India
2 Department of Agricultural Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar(M.S.), India
     

   Subscribe/Renew Journal


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.
Subscription Login to verify subscription
User
Notifications
Font Size


  • 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.

Abstract Views: 29

PDF Views: 0




  • Seasonal Incidence of the Sucking Pest and Lady Bird Beetle on Bt Cotton

Abstract Views: 29  |  PDF Views: 0

Authors

Rohini Khedkar
College of Agriculture, Dhule (M.S.), India
G. B. Kabre
Department of Agricultural Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar(M.S.), India

Abstract


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.

References