Effect of Different Temperatures on the Biology of Citrostichus phyllocnistoides (Narayanan) (Hymnoptera: Eulophidae) a Parasitoid of Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae)


PAKISTAN JOURNAL OF ZOOLOGY, cilt.49, ss.685-691, 2017 (SCI İndekslerine Giren Dergi) identifier identifier


The effect of constant temperatures on developmental time and parasitization rate of Citrostichus phyllocnistoides was evaluated on Plzyllocnistis citrella at nine constant temperatures ranging from 15 degrees C +/- 1 to 35 degrees C +/- 1 in 2.5 degrees C increments in the laboratory. Developmental periods of immature stages ranged from 34.98 days at 15 degrees C to 9.15 days at 35 degrees C. The lower developmental threshold for C. phyllocnistoides estimated was 8.93 degrees C. Mortality rate of immature stages decreased as the temperature increased, ranged from 27% at 15 degrees C to 8% at 35 degrees C. Longevity of both sexes were different at all temperatures studied (except 30 and 32.5 degrees C), ranged from 22.1 days at 15 degrees C to 8.0 days at 35 degrees C for males and 23.8 days at 15 degrees C to 8.3 days at 35 degrees C for females. Parasitization rate of C. phyllocnistoides on Phyllocnistis citrella increased with the temperature up to 32.5 degrees C being 49%, then decreased at 35 degrees C.