EFFECT OF TEMPERATURE ON CERTAIN BIOLOGICAL AND LIFE TABLE PARAMETERS OF Rhopaiosiphum maidis, Aphis craccivora, AND Aphis nerii (Hemiptera: Aphididae). | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 1, Volume 29, Issue 12, December 2004, Page 7465-7480 PDF (4.06 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2004.240075 | ||||
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| Author | ||||
| A. H. Abdel-Salam, | ||||
| Economic Entomology pepartment, Faculty of Agriculture, Mansoura University, Mansoura 35516, EGYPT | ||||
| Abstract | ||||
| The developmental times, survivorship, longevity, fecundity, and life table parameters of three aphid species namely, Rhop < /em>a/osiphum maidis (Fitch), Aphis craccivora Koch. and Aphis nerii Boyer de Fonscolobe were investigated at two constant temperatures 25 and 30°C. The data revealed that there was no significant variation in the developmental time of R. maidis nymphs between the two tested temperatures, while, these differences statistically occurred with A. craccivora and A. nerii. The survival percentage of the three aphid species differed significantly between the two tested temperatures. The higher survival percentage was observed at 30°C. The female longevity was decreased at 30°C more than at 25°C with the three aphid species. The regression analysis indicated that the female fecundity rate of R. maidis and A. craccivora at the two tested temperatures decreased gradually with the older age of the female. This relationship was not found with A. nerii at both 25 and 30°C. From the obtained results, the calculated values of the mean generation time (T) and doubling time (OT) of R. maidis, A. craccivora, and A. nerii were shorter at 30°C than at 25°C. The intrinsic rate of increase (rm) and finite rate of increase (A) exhibited a similar trend. Meanwhile, the values of gross reproductive rate (GRR) and net reproductive rate (Ro) were higher at 25°C than at 30°C for the three aphid species. | ||||
| Keywords | ||||
| Rhopalosiphum maidis; Aphis eraeeivora; Aphis nerii; biological characteristics; temperature; life table parameters | ||||
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