Evaluation of leaves extract of Solanum melongena and Cyperus rotundus against Sitophilus Oryzae L.(Coleoptera:Curculionidae) | ||||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||||
| Article 4, Volume 4, Issue 2, December 2011, Page 31-37 PDF (522.14 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eajbsa.2011.15162 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Olfat M. El Monairy; Aida S. Kamel | ||||
| Benha University, Faculty of Science, Entomology department. | ||||
| Abstract | ||||
| This study was conducted to evaluate Toxicity and repellent effects of two locally available plants namely Solanum melongena (Solanacae) and Cyperus rotundus (Cyperacae) against adults of Sitophilus Oryzae. The plant extracts were applied at five concentrations on rice grains which 2.5, 5, 10, 25 and 50%) for each.. Adult insects were exposed to treated rice grains and mortality was calculated after 1, 2, 6, 10 and 17 days of exposure. The results indicated that the toxic and repellent effects were proportional to concentrations and time intervals. Higher concentrations had stronger toxicity and repellent effects than lower concentrations. Rice grains weevils which were treated with two plant extracts exhibited significant mortality percentage of 76.6 and 46.66, respectively, after 17 days at 50% concentration. These indicated that S. melongena was more toxic than C. rotundus against adult insects. The highest concentrations of 50% extracts giving 56.6 and 51.6 repellency respectively in both plant extracts percentage | ||||
| Keywords | ||||
| Sitophilus oryzae; extracts; Solanum melongenae; Cyperus rotundu; mortality; repellency | ||||
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