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Abd El-Wahab, H., Hadi, S., Riad, N. (2010). INFLUENCE OF DIFFERENT TEMPERATURES ON THE BIOLOGICAL ASPECTS OF Eutetranychus africanus (Tucker) (ACARI:TETRANYCHIDAE:PROSTIGMATA). Journal of Plant Protection and Pathology, 1(7), 519-524. doi: 10.21608/jppp.2010.86888
Horia A. Abd El-Wahab; S. A. Hadi; Naglaa F. Riad. "INFLUENCE OF DIFFERENT TEMPERATURES ON THE BIOLOGICAL ASPECTS OF Eutetranychus africanus (Tucker) (ACARI:TETRANYCHIDAE:PROSTIGMATA)". Journal of Plant Protection and Pathology, 1, 7, 2010, 519-524. doi: 10.21608/jppp.2010.86888
Abd El-Wahab, H., Hadi, S., Riad, N. (2010). 'INFLUENCE OF DIFFERENT TEMPERATURES ON THE BIOLOGICAL ASPECTS OF Eutetranychus africanus (Tucker) (ACARI:TETRANYCHIDAE:PROSTIGMATA)', Journal of Plant Protection and Pathology, 1(7), pp. 519-524. doi: 10.21608/jppp.2010.86888
Abd El-Wahab, H., Hadi, S., Riad, N. INFLUENCE OF DIFFERENT TEMPERATURES ON THE BIOLOGICAL ASPECTS OF Eutetranychus africanus (Tucker) (ACARI:TETRANYCHIDAE:PROSTIGMATA). Journal of Plant Protection and Pathology, 2010; 1(7): 519-524. doi: 10.21608/jppp.2010.86888

INFLUENCE OF DIFFERENT TEMPERATURES ON THE BIOLOGICAL ASPECTS OF Eutetranychus africanus (Tucker) (ACARI:TETRANYCHIDAE:PROSTIGMATA)

Article 6, Volume 1, Issue 7, July 2010, Page 519-524  XML 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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