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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 6
First page : (375) Last page : (382)
Article doi: : http://dx.doi.org/10.18782/2320-7051.6642

Bio-ecology of Mango Leaf Twisting Weevil (Apoderus transquebaricus)

J. Manjunath¹* and T. Umamaheshwari^2
1Scientist (Entomology), Regional Agricultural Research Station, Nandyal-518502, Andhra Pradesh, India
²Professor, Department of Entomology, College of Agriculture, Rajendra Nagar,
Hyderabad, Telangana State, India
*Corresponding Author E-mail: jmnath.ento@gmail.com
Received: 21.06.2018 | Revised: 26.07.2018 | Accepted: 4.08.2018  

 ABSTRACT

A study on Bio ecology of mango leaf weevil was studied at S.V. Agricultural College, Tirupathi, A. P.  Eggs were laid singly,oval shiny yellow coloured and 2.1 mm in length and 0.2 mm in width and the egg period completed 2.5 to  4.0 days. Early grubs were small , sluggish  and pale yellow in colour and the  average length and width ranged from 1.95 mm and 1.0 mm respectively and the matured grub stage an average of 8.5mm in length and 3.1mm in width and the grub stage  lasted on an  average 12.3 days. The pupa was pale yellow in colour the average length and width 3.4 mm and 2.8mm respectively and in active stage that lasted on an average of 6.2 days. adults of the leaf twisting weevils were shiny reddish brown weevils with typical shape. adult females were bigger in size  than the males. adult average longevity is of  17 days. The length of adult  female an average of 12.0 mm and the width an average of 5.6 mm respectively. For seasonal influence highest (20.3%) level of leaf twisting weevil population was recorded during third week of September and lowest (1.4%) during second week of January 2004. leaf twisting weevil population was positively correlated with rainfall  and morning relative humidity  and evening  relative humidity. It was negatively correlated with maximum and minimum temperature.

Key words: Mango leaf twisting weevil (Apoderus transquebaricus), Biology and Seasonal   incidence

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Manjunath, J. and Umamaheshwari, T., Bio-ecology of Mango Leaf Twisting Weevil (Apoderus transquebaricus), Int. J. Pure App. Biosci.6(6): 375-382 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6642