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Influence of different temperatures on the biological aspects of Eutetranychus afrlcanus (Tucker) (Acari : Tetranychidae : Prostigmata) [electronic resource].

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Abd El-Wahab, Horla A

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Language: English Summary language: Arabic Description: p.519-524Other title:

تأثير درجات الحرارة الثابتة علي الخطوات البيولوجية Eutetranychus afrlcanus (Tucker) والوحدات الحرارية [Added title page title]

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Mansoura University Journal of plant protection and pathology, 2010 v. 1 (7) [electronic resource].

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In: Mansoura University Journal of Plant Protection and Pathology. a183494 2010.v.1(7)Summary: The effect of three temperature degrees (20, 25 and 300C) and 65±5%RH. on the biological aspects of Eutetranychus 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 °C and 48.8 degreedays (DO's, female). Development of egg stage r6quired 61.6 & 65.6 dd's above 13.4 °C while generation period demanded 162.54Odd·s ,above 13.02°C and this value·. 155.9 dd's above 8.05 OC for Longevity. The accumulated thermal 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 (Le the relationship between temperature and speed of development).

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The effect of three temperature degrees (20, 25 and 300C) and 65±5%RH. on the biological aspects of Eutetranychus 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 °C and 48.8 degreedays (DO's, female). Development of egg stage r6quired 61.6 & 65.6 dd's above 13.4 °C while generation period demanded 162.54Odd·s ,above 13.02°C and this value·. 155.9 dd's above 8.05 OC for Longevity. The accumulated thermal 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 (Le the relationship between temperature and speed of development).

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