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. test, 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". test, 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', test, 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. test, 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

Egyptian Journal of Agricultural Research
Article 9, Volume 80, Issue 2, July 2002, Pages 631-645    PDF (3.93 M)
Document Type: Original Article
DOI: 10.21608/ejar.2002.306567
Authors
IMAN I. EL-SEBAEY1; MOHAMED M. EL-SHAZLY2; HOREYA A. ABDEL-WAHAB1
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.
Keywords
Coranus Mikan& reduviidae; population; seasonal history; natality; weather
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