INFLUENCE OF DIFFERENT TEMPERATURES ON THE BIOLOGICAL ASPECTS OF Eutetranychus africanus (Tucker) (ACARI:TETRANYCHIDAE:PROSTIGMATA) | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 6, Volume 1, Issue 7, July 2010, Page 519-524 PDF (338.26 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2010.86888 | ||||
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| Authors | ||||
| Horia A. Abd El-Wahab; S. A. Hadi; Naglaa F. Riad | ||||
| Plant Protection Research Institute, ARC, Dokki, Giza, Egypt. | ||||
| Abstract | ||||
| The effect of three temperature degrees (20, 25 and 30ºC) and 65±5%RH. on the biological aspects ofEutetranychus africanus (Tucker) were investigated. Threshold of development (t) and accumulated heats (k) for total immature duration development of E. africanus (Tucker)were calculated to be 15.7 ºC and 48.8 degree-days (DD`s, female). Development of egg stage required 61.6 & 65.6 dd`s above 13.4 ºC while generation period demanded 162.540dd`s , above 13.02 ºC and this value 155.9 dd`s above 8.05 ºC for Longevity.The accumulatedthermal heat units (T.U.) or effective degree-days estimated through the mite activity time. The aim of this part of investigation is to establish the velocity constants (i.e the relationship between temperature and speed of development). | ||||
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