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Influence of temperature on some biological aspects and production of four Trichogrammatids [electronic resource].

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Shalaby, F. F

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Language: English Summary language: Arabic Description: p.2247-2259Other title:

تأثير درجات الحرارة على بعض المظاهر البيولوجية والكفاءة الانتاجية لطفيل الترايكوجراما [Added title page title]

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Egyptian journal of agricultural research, 2008 v. 86 (6) [electronic resource].

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In: Egyptian Journal of Agricultural Research 2008.v.86 (6)Summary: Laboratory studies were conducted to determine the Influence of temperature on some biological aspects and production of Trichogramma evanescens, Trichogramma embryophagum Trichogramma brassicae and Trichogrammatoidea bactrae when reared on eggs of pectinophora gossypiella. It was found that he longest developmental period obtained at 15°C, while the shortest was at 30°C. The lower thresholds of development (LTRS) of the four species were estimated by 11.11, 10.75, 9.92 and 9.80 °C, respectively. In addition, the relation between developmental period and temperature provided upper temperature thresholds (UTRS) of 32.12, 31.91, 32.2 and 32.65°C for the four-parasitoid species, respectively. While the degree-days Celsius (DDC) were estimated by 137.78, 135.32, 155.71 and 157.36 degree-days, respectively. The effect of temperature on survivorship, females' longevity and fecundity were also studied.

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Laboratory studies were conducted to determine the Influence of temperature on some biological aspects and production of Trichogramma evanescens, Trichogramma embryophagum Trichogramma brassicae and Trichogrammatoidea bactrae when reared on eggs of pectinophora gossypiella. It was found that he longest developmental period obtained at 15°C, while the shortest was at 30°C. The lower thresholds of development (LTRS) of the four species were estimated by 11.11, 10.75, 9.92 and 9.80 °C, respectively. In addition, the relation between developmental period and temperature provided upper temperature thresholds (UTRS) of 32.12, 31.91, 32.2 and 32.65°C for the four-parasitoid species, respectively. While the degree-days Celsius (DDC) were estimated by 137.78, 135.32, 155.71 and 157.36 degree-days, respectively. The effect of temperature on survivorship, females' longevity and fecundity were also studied.

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