ISMAIL, I., OMAR, E., HASHEM, M. (1995). THE EFFECTS OF SUBLETHAL CONCENTRATIONS OF CARBON DIOXIDE (CO2) IN ATMOSPHERE ON SOME BIOLOGICAL ASPECTS OF THE COWPEA WEEVIL Callosobruchus maculatus F. (Bruchidae : Coleoptera). Egyptian Journal of Agricultural Research, 73(1), 111-118. doi: 10.21608/ejar.1995.433185
ISMAIL I. ISMAIL; ESAM E. OMAR; MOHAMED Y. HASHEM. "THE EFFECTS OF SUBLETHAL CONCENTRATIONS OF CARBON DIOXIDE (CO2) IN ATMOSPHERE ON SOME BIOLOGICAL ASPECTS OF THE COWPEA WEEVIL Callosobruchus maculatus F. (Bruchidae : Coleoptera)". Egyptian Journal of Agricultural Research, 73, 1, 1995, 111-118. doi: 10.21608/ejar.1995.433185
ISMAIL, I., OMAR, E., HASHEM, M. (1995). 'THE EFFECTS OF SUBLETHAL CONCENTRATIONS OF CARBON DIOXIDE (CO2) IN ATMOSPHERE ON SOME BIOLOGICAL ASPECTS OF THE COWPEA WEEVIL Callosobruchus maculatus F. (Bruchidae : Coleoptera)', Egyptian Journal of Agricultural Research, 73(1), pp. 111-118. doi: 10.21608/ejar.1995.433185
ISMAIL, I., OMAR, E., HASHEM, M. THE EFFECTS OF SUBLETHAL CONCENTRATIONS OF CARBON DIOXIDE (CO2) IN ATMOSPHERE ON SOME BIOLOGICAL ASPECTS OF THE COWPEA WEEVIL Callosobruchus maculatus F. (Bruchidae : Coleoptera). Egyptian Journal of Agricultural Research, 1995; 73(1): 111-118. doi: 10.21608/ejar.1995.433185
THE EFFECTS OF SUBLETHAL CONCENTRATIONS OF CARBON DIOXIDE (CO2) IN ATMOSPHERE ON SOME BIOLOGICAL ASPECTS OF THE COWPEA WEEVIL Callosobruchus maculatus F. (Bruchidae : Coleoptera)
1Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza, Egypt
2Plant Protection Research Institute, Agriculture Research Centre, Dokki, Giza, Egypt
Abstract
Three sublethal concentrations of carbon dioxide in atmosphere (LC25, LC40 and LC50 ) were investigated to study their effect on some biological aspects of Callosobruchus maculatus. At all sublethal concentrations the longevity of females was shorter than that of males. As the sublethal concentrations increased, the longevity of the survivor adults decreased. The number of eggs laid per female was greatly reduced as the concentration increased. These dosages did not inhibit eggs deposition. The reproductive potential of C.maculatus as measured by the mean number of offspring per female was considerably reduced by increasing the sublethal dose of CO2 to LC50. These results were concluded from a progeny resulting from eggs exposed to the above ' mentioned concentrations for 3 days.
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