High temperature treatment on the eggs of the mosquito, Culex quinquefasciatus Say and its effects on the subsequent stages developed therefrom

  • Humayun Reza Khan Department of Zoology, University of Dhaka, Dhaka-1000
  • Md Mosarraf Hossain Department of Zoology, University of Dhaka, Dhaka-1000
Keywords: High temperature, Culex quinquefasciatus, Mosquito, Immature stages

Abstract

The eggs of Culex quinquefasciatus Say (Diptera: Culicidae) were exposed to 40oC for different exposure periods (viz. half an hour, one, two and four hours) and control (room temperature, 28±6oC); the percentage of egg hatching ranged from 74.14 to 96.33 (F=215.593, P<0.05), larval mortalities were from 24.52 to 0.00% (F=73.287, P<0.05), pupal mortalities ranged from 10.2 to16.71% (F=34.056, P<0.05), mean larval periods ranged from 127.9 to 155.3 hours (F=124.002, P<0.05), mean pupal periods ranged from 30.5 to 36.1 hours (F=10.531, P<0.05), lengths of 2nd instar ranged from 3.82 to 4.67 mm (F=16.50, P<0.05), lengths of 3rd instar ranged from 6.195 to 7.195 mm (F=7.558, P<0.05), lengths of 4th instar ranged from 7.395 to 8.025 mm (F=3.961, P<0.05), mean diameter of the head capsule of 1st instar larvae was 0.316 to 0.384 mm (F=8.308, P<0.05), that of 2nd instar larvae was 0.395 to 0.468 mm (F=4.953, P<0.05), that of 3rd instar larvae was 0.652 to 0.71 mm (F=2.629, P>0.05), that of 4th instar larvae was 0.806 to 0.91 mm (F= 13.871, P<0.05), length of the cephalothorax of pupae ranged from 1.862 to 2.062 mm (F=0.662, P>0.05), body length of male adults ranged from 3.41 to 3.58 mm (F=0.59, P>0.05), and that of female ranged from 3.75 to 4.09 mm (F=1.98, P>0.05), mean egg- rafts laid per female ranged from 1.4 to 2.0 and mean numbers of eggs per raft were 230 to 260.

DOI: http://dx.doi.org/10.3329/jasbs.v39i2.17864

J. Asiat. Soc. Bangladesh, Sci. 39(2): 247-257, December 2013

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Abstract
2015
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571
Published
2014-02-03
How to Cite
Khan, H., & Hossain, M. M. (2014). High temperature treatment on the eggs of the mosquito, Culex quinquefasciatus Say and its effects on the subsequent stages developed therefrom. Journal of the Asiatic Society of Bangladesh, Science, 39(2), 247-257. https://doi.org/10.3329/jasbs.v39i2.17864
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