عتبة النمو و الوحدات الحرارية اللازمة لنمو و تطور بق الحمضيات الدقيقي (Risso), Hemiptera : Pseudococcidae Planococcus citri

عتبة النمو و الوحدات الحرارية اللازمة لنمو و تطور بق الحمضيات الدقيقي (Risso), Hemiptera : Pseudococcidae Planococcus citri

Laboratory studies was conducted in Biocontrol unit- Faculty of Agriculture- University of Baghdad in order to determine the impact of different temperatures 15, 20, 25, 30 and 35 ±2 C° on the development and growth rate of different stages of mealy bug P.citri. The results showed that the total dev...

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Veröffentlicht in:Iraqi journal of agricultural science 2017, Vol.48 (2), p.501-506
Hauptverfasser: الشمري، حازم عيدان, الزبيدي، حمزة كاظم
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بق الحمضيات الدقيقي
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container_title Iraqi journal of agricultural science
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creator الشمري، حازم عيدان
الزبيدي، حمزة كاظم
description Laboratory studies was conducted in Biocontrol unit- Faculty of Agriculture- University of Baghdad in order to determine the impact of different temperatures 15, 20, 25, 30 and 35 ±2 C° on the development and growth rate of different stages of mealy bug P.citri. The results showed that the total developmental time from (egg - adult)of the mealy bug were 24.0, 28.08, 39.67 and 73.31 days respectively. With significant rearing differences on temperatures 15, 20, 25 and 30 ±2 C° respectively, while no development and growth rate on temperature 35±C°. the developmental threshold for the mealy bug stages eggs, crawlers, 2nd and 3rd nymphal instars as well as the duration of the egg to adult were different, being 7.1, 7.26, 7.08, 7.12 and 7.15C° respectively, while 116.27, 136.98 and 172.4 thermal units for degree days required for growth and development while the thermal constant for the period from egg to adult was 526.31. Optimum temperature was 27.85 while Upper threshold was 33.64 C° for P.citri Which refers to the lack of suitable high temperature for growth and development .
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title عتبة النمو و الوحدات الحرارية اللازمة لنمو و تطور بق الحمضيات الدقيقي (Risso), Hemiptera : Pseudococcidae Planococcus citri
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