The potency of Chloropyrifos and Camphor extract on Spodoptera littoralis (BOISD.) | ||
| Egyptian Academic Journal of Biological Sciences. A, Entomology | ||
| Article 15, Volume 5, Issue 2, August 2012, Pages 131-139 PDF (173.83 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eajbsa.2012.14821 | ||
| Authors | ||
| Hanan H. Osman; Badr El-Sabah A. Fetoh; Abeer M. Mohammad | ||
| Plant protection research institute, A.R.C., Dokki-Giza, Egypt | ||
| Abstract | ||
| The biological and biochemical effects chloropyrifos, camphor extract and their combination were studied against the 4th instars of Spodoptera littoralis under semi-field conditions. The results indicated that the LC50 for chloropyrifos was 0.08 ppm and 13.3 x 103 ppm for the camphor extract. The estimated Co-toxicity factor was 13.2 So, there is an additive effect between camphor oil and chloropyrifos against S. littoralis. Oil extract of camphor prolonged larval and pupal duration also the same effect happened when using mixture of camphor extract and chloropyrifos. This prolongation was accompanied with a reduction in pupal weight of the treated larvae. While when using chloropyrifos only the larval and pupal duration were shortened Also % of pupation and % of adult emergence were more decrease in plant extract and insecticide mixture than each compound alone. Biochemical studies showed that, total protein content of larval instars decreased by 31, 26 and 13.5 % for camphor extract, chloropyrifos and its combination, respectively. Also, the activity of acid phosphatase, α-esterase was significantly decreased. Where the alkaline phosphatase, activity increased When compared with control. | ||
| Keywords | ||
| Spodoptera littoralis; Chloropyrifos; camphor extract; Biochemical and biological effects | ||
|
Statistics Article View: 184 PDF Download: 379 |
||
