Some Biological Aspects of the Two-Spotted Spider Mite, Tetranychus urticae Koch, (Acari: Tetranychidae) at Constant Temperatures | ||||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||||
| Article 6, Volume 9, Issue 2, June 2016, Page 61-68 PDF (253.75 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsa.2016.12844 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Salwa M. El-Saied Sholla | ||||
| Plant Protection Research Institute, Agricultural Research Center | ||||
| Abstract | ||||
| Biology of the two spotted spider mite, Tetranychus urticae Koch was studied at constant temperatures of 26º and 30ºC. A temperature of 30º was found to be the most favorable temperatures for the development and multiplication of this pest. Threshold temperatures (t0) of 12.87º, 12.92º, 9.45º, and 13.94 ºC were calculated for the egg, larvae, protonymph and deutonymphal stages, respectively. Based on these thresholds the stages respectively needed about 63.35, 26.81, 30.95, and 26.17 day-degrees to complete their development. Thermal units required to develop one generation of this pest was about 146.48 day-degrees using 12.50ºC as a base temperature. | ||||
| Keywords | ||||
| two spotted spider mite; Temperature; Development | ||||
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