Subscribe Now Subscribe Today
Science Alert Home Journals at Science Alert For Authors For Subscribers Contact Us
   
Pakistan Journal of Biological Sciences
  Year: 2004 | Volume: 7 | Issue: 7 | Page No.: 1191-1193
DOI: 10.3923/pjbs.2004.1191.1193
Embryo Development and Egg Hatching of Sitona crinitus Herbst (Coleoptera: Curculionidae) under Constant Temperature Regimes
M. El Damir, M. El Bouhssini and M.N. Al-Salty

Abstract:
The effect of constant temperatures (5, 8, 10, 15, 20, 25, 30 and 35°C) on embryo development period and percentage of egg hatching of S. crinitus Herbst was determined in the laboratory. A significant negative relationship (P < 0.05; r = - 0.84) was found between temperature and embryo development. At temperatures below 35°C there was no significant effect on egg hatching. At 30°C, the embryo development period was the shortest, 7 days; whereas at 8°C this parameter was the longest, 69 days. At 35°C eggs became dry and deformed. Temperatures below 10°C induced quiescence in the egg stage. This information is useful for predicting S. crinitus infestation levels.
 [Fulltext PDF]   [References]   [View Citation]  [Report Citation]
How to cite this article:

M. El Damir, M. El Bouhssini and M.N. Al-Salty , 2004. Embryo Development and Egg Hatching of Sitona crinitus Herbst (Coleoptera: Curculionidae) under Constant Temperature Regimes. Pakistan Journal of Biological Sciences, 7: 1191-1193.

DOI: 10.3923/pjbs.2004.1191.1193

URL: http://scialert.net/abstract/?doi=pjbs.2004.1191.1193

 
COMMENT ON THIS PAPER
.
 
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

                 home       |       journals        |       for authors       |       for subscribers       |       asci
          © Science Alert. All Rights Reserved