TEMPERATURE EFFECT ON DEVELOPMENTAL, RATE LONGEVITY AND PARASITISM OF Diaeretiella rapae (M'INTOSH) (HYMENOPTERA- APHELINIDAE)

Taha, M.; Abd-El Wahab, H; Mahmoud, Hanaa I.; Abasse, A; Moustafa, Inas M. Y.

doi:10.21608/jppp.2014.87909

TEMPERATURE EFFECT ON DEVELOPMENTAL, RATE LONGEVITY AND PARASITISM OF Diaeretiella rapae (M'INTOSH) (HYMENOPTERA- APHELINIDAE)

Document Type : Original Article

Authors

¹ Zool..Dept. Fac. . Sci(Girls).,Al- Azhar Univ.,Nasrcity Egypt.

² Plant Protection Research Institute Dokki- Giza, Egypt

³ * Zool..Dept. Fac. . Sci(Girls).,Al- Azhar Univ.,Nasrcity Egypt.

⁴ **Plant Protection Research Institute Dokki- Giza, Egypt

10.21608/jppp.2014.87909

Abstract

Temperature- dependent, biological aspects longevity and parasitism of the parasitoid Diaeretiella rapae (M'Intosh) was measured at three constant temperatures (15, 25 and 30 ^oC) using Brevicoryne brassicae (L.) . The threshold (t₀) and thermal units (DD's) of different stages of D. rapae at different temperatures, 15, 25 and 30^oC., were studied. The rate of development of all stages increased as the temperature increase from 15 to 30 ^oC. The mean of thermal units recorded 117.9, 88.84 and 222.45 DDs for egg-mummy period, mummy- adult period and adult longevity respectively. Also, the threshold development estimated as 2.4, 1.6 and 3.4 ^oC for egg- mummy period, mummy- adult period and adult longevity respectively.