INFLUENCE OF PREY TYPES ON CERTAIN BIOLOGICAL CHARACTERISTICS OF Hippodamia tridecimpunctata L. UNDER CONSTANT TEMPERATURE AND RELATIVE HUMIDITY. | ||
| Journal of Plant Protection and Pathology | ||
| Article 10, Volume 2, Issue 11, November 2011, Pages 1023-1035 PDF (367.26 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2011.86633 | ||
| Authors | ||
| Nadia E. Mohamed1; A. A. Ghanim2; A. A. Saleh1 | ||
| 1Plant Protection Res. Inst., Agric. Res. Center, Dokki Giza, Egypt. | ||
| 2Economic Entomology Dept., Fac. Agric., Mansoura University, Egypt. | ||
| Abstract | ||
| Laboratory experiments were carried out to study certain biological characteristics of the coccinellid predator, Hippodamia tridecimpunctata L. when reared on the following aphid species; Sitobion avenae Fabr.; Rhopalosiphum maidis (Fitch); Acyrthosiphon pisum (Harris) and Aphis gossypii Glover under constant temperature and relative humidity. The data revealed that the total developmental time from egg hatching to adult eclosion of the coccinellid predator was differed significantly when reared on the four tested aphid species. Mortality percentage of H. tridecimpunctata from egg hatching to adult emergence ranged from 4.98 % when fed on A. pisum to 9.05% on S. avenae. Based on statistical analysis, the mortality percentage showed significant difference among the four aphid species. The total consumption rate per H. tridecimpunctata larva from the four aphid species were 695.80±10.75; 781.83±15.68; 612.50±9.55 and 894.53±11.61 aphid individuals when reared on S. avenae ; R. maidis ; A. pisum and A. gossypii, respectively. The average number of aphids consumed per larva for the coccinellid predator was also significantly different. The aphid species have a significant effect on the longevity of adult stage of the coccinellid predator and the fecundity of this female. The average number of eggs deposited per H. tridecimpunctata female was 948.29±15.76; 815.67±7.68; 989.54±16.11 and 728.54±6.85 eggs when reared on S. avenae ; R. maidis; A. pisum and A. gossypii, respectively. The statistical analysis showed that the aphid species have a highly significant effect on the female fecundity. It can be recommended that the coccinellid predator used as biological control agents against the four aphid species tested. | ||
| Keywords | ||
| Biology, Hippodamia tridecimpunctata L; Sitobion avenae Fabr; Rhopalosiphum maidis (Fitch); Acyrthosiphon pisum (Harris) and Aphis gossypii Glover | ||
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