Disturbance of the Main Body Metabolites in Larvae and Pupae of Spodoptera littoralis (Lepidoptera: Noctuidae) by Certain Sesquiterpene Compounds
Kh., H., K., G., Sh., S., H., W. (2020). Disturbance of the Main Body Metabolites in Larvae and Pupae of Spodoptera littoralis (Lepidoptera: Noctuidae) by Certain Sesquiterpene Compounds. EKB Journal Management System, 12(2), 133-156. doi: 10.21608/eajbsc.2020.128674
Hamadah, Kh.; Ghoneim, K.; Selim, Sh.; Waheeb, H.. "Disturbance of the Main Body Metabolites in Larvae and Pupae of Spodoptera littoralis (Lepidoptera: Noctuidae) by Certain Sesquiterpene Compounds". EKB Journal Management System, 12, 2, 2020, 133-156. doi: 10.21608/eajbsc.2020.128674
Kh., H., K., G., Sh., S., H., W. (2020). 'Disturbance of the Main Body Metabolites in Larvae and Pupae of Spodoptera littoralis (Lepidoptera: Noctuidae) by Certain Sesquiterpene Compounds', EKB Journal Management System, 12(2), pp. 133-156. doi: 10.21608/eajbsc.2020.128674
Kh., H., K., G., Sh., S., H., W. Disturbance of the Main Body Metabolites in Larvae and Pupae of Spodoptera littoralis (Lepidoptera: Noctuidae) by Certain Sesquiterpene Compounds. EKB Journal Management System, 2020; 12(2): 133-156. doi: 10.21608/eajbsc.2020.128674

Disturbance of the Main Body Metabolites in Larvae and Pupae of Spodoptera littoralis (Lepidoptera: Noctuidae) by Certain Sesquiterpene Compounds

Egyptian Academic Journal of Biological Sciences. C, Physiology and Molecular Biology
Article 11, Volume 12, Issue 2, December 2020, Page 133-156  XML PDF (895.27 K)
Document Type: Original Article
DOI: 10.21608/eajbsc.2020.128674
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Authors
Hamadah, Kh.1; Ghoneim, K.1; Selim, Sh.2; Waheeb, H.1
1Department of Zoology and Entomology, Faculty of Science, Al-Azhar University, Cairo, Egypt
2Department of Pesticide Chemistry and Technology, Faculty of Desert and Environmental Agriculture, Matrouh University, Matrouh, Egypt
Abstract
The Egyptian cotton leafworm Spodoptera littoralis (Boisduval) is a dangerous pest of many field crops and vegetables in the world. The present study was conducted to investigate the disturbing effects of the sesquiterpene compounds, Farnesol, Nerolidol, and Bisabolol, on the main body metabolites in larvae and pupae of this insect. The newly moulted last (6th) instar larvae were treated with LC50 values of these compounds (33.67, 42.24 and 59.31 ppm, respectively) and the determination of the main metabolites was achieved in haemolymph and fat bodies of larvae and the homogenate of pupae. The most important results could be summarized as follows. The present study recorded predominant reducing effects of these compounds on the protein content in larvae and pupae with an exceptional enhancing effect of some compounds at certain ages of last instar larvae. Also, the lipid content in haemolymph and fat bodies of larvae as well as in the pupae was remarkably reduced. In addition, all compounds exhibited predominant reducing effects on the carbohydrate content in haemolymph and fat bodies of larvae and in the pupae, with two exceptions of increasing carbohydrate content in larval haemolymph (at 24 hr post-treatment) and in larval fat bodies by Nerolidol (at 72 hr post-treatment).
Keywords
Carbohydrate; fat bodies; haemolymph; larva; lipid; protein; pupa
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