EL-SEBAEY, I., EL-SHAZLY, M., ABDEL-WAHAB, H. (2002). SEASONAL CHANGES IN THE POPULATION DENSITY OF CORANUS AFRICANA EL-SEBAEY IN EGYPT AS INDICATED BY LIFE TABLE PARAMETERS. Egyptian Journal of Agricultural Research, 80(2), 631-645. doi: 10.21608/ejar.2002.306567
IMAN I. EL-SEBAEY; MOHAMED M. EL-SHAZLY; HOREYA A. ABDEL-WAHAB. "SEASONAL CHANGES IN THE POPULATION DENSITY OF CORANUS AFRICANA EL-SEBAEY IN EGYPT AS INDICATED BY LIFE TABLE PARAMETERS". Egyptian Journal of Agricultural Research, 80, 2, 2002, 631-645. doi: 10.21608/ejar.2002.306567
EL-SEBAEY, I., EL-SHAZLY, M., ABDEL-WAHAB, H. (2002). 'SEASONAL CHANGES IN THE POPULATION DENSITY OF CORANUS AFRICANA EL-SEBAEY IN EGYPT AS INDICATED BY LIFE TABLE PARAMETERS', Egyptian Journal of Agricultural Research, 80(2), pp. 631-645. doi: 10.21608/ejar.2002.306567
EL-SEBAEY, I., EL-SHAZLY, M., ABDEL-WAHAB, H. SEASONAL CHANGES IN THE POPULATION DENSITY OF CORANUS AFRICANA EL-SEBAEY IN EGYPT AS INDICATED BY LIFE TABLE PARAMETERS. Egyptian Journal of Agricultural Research, 2002; 80(2): 631-645. doi: 10.21608/ejar.2002.306567
SEASONAL CHANGES IN THE POPULATION DENSITY OF CORANUS AFRICANA EL-SEBAEY IN EGYPT AS INDICATED BY LIFE TABLE PARAMETERS
1Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt.
2Entomology Department, Faculty of Science, Cairo University, Giza, Egypt
Abstract
Monitoring the changes in the population density of the adult predatory bug, Coranus africana EI-Sebaey (liemiptera-Reduviidae) was carded out from February 1999 till January 2001 in Kom Oshim district which situated in the Western Desert Ago-ecosystem (Egypt). The highest number of adults was achieved between July and October, while the lowest level of the population was reported between February and March during the two tested successive years. The effect of the prevailing physical environmental factors on the population density and life table parameters was also studied by raising an artificial population of the predator in field cages. This reduviid completed six overlapping generations in a year. The basic life table parameters, expressed as the net reproductive rate (130), gross reproductive rate (GRR), instantaneous rate of natural increase (rm) and the mean generation time (T) were determined with respect to the date of hatching. The average values of these parameters under natural climatic conditions were 81.16, 902.01, 0.3798 and 12.24, for Ro, GRR, rm and T, respectively.
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