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Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control
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Elhadek, M., Mohamady, A., Ali, R. (2015). Toxicity and Biochemical Effects of Four Plant Essential Oils Against Cotton Leafworm, Spodoptera littoralis (Boisd). Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 7(1), 153-162. doi: 10.21608/eajbsf.2015.17250
Mona K. Elhadek; Aziza H. Mohamady; Reham E. Ali. "Toxicity and Biochemical Effects of Four Plant Essential Oils Against Cotton Leafworm, Spodoptera littoralis (Boisd)". Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 7, 1, 2015, 153-162. doi: 10.21608/eajbsf.2015.17250
Elhadek, M., Mohamady, A., Ali, R. (2015). 'Toxicity and Biochemical Effects of Four Plant Essential Oils Against Cotton Leafworm, Spodoptera littoralis (Boisd)', Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 7(1), pp. 153-162. doi: 10.21608/eajbsf.2015.17250
Elhadek, M., Mohamady, A., Ali, R. Toxicity and Biochemical Effects of Four Plant Essential Oils Against Cotton Leafworm, Spodoptera littoralis (Boisd). Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 2015; 7(1): 153-162. doi: 10.21608/eajbsf.2015.17250

Toxicity and Biochemical Effects of Four Plant Essential Oils Against Cotton Leafworm, Spodoptera littoralis (Boisd)

Article 18, Volume 7, Issue 1, Summer and Autumn 2015, Page 153-162  XML PDF (584.38 K)
Document Type: Original Article
DOI: 10.21608/eajbsf.2015.17250
Authors
Mona K. Elhadek1; Aziza H. Mohamady2; Reham E. Ali1
1Resistance Department, Central Agricultural Pesticides Laboratory, Agriculture Research Center, Dokki, Giza, Egypt
2Bioassay Department, Central Agricultural Pesticides Laboratory, Agriculture Research Center, Dokki, Giza, Egypt
Abstract
This study was undertaken to investigate the toxicity of four natural source essential oils (Trigonella foenum graecu,  Sesamum indica,  Eucalyptus camaldulensis and Nigella sativa) on 4th larval instar of  Spodoptera littoralis. Biochemical changes in larvae induced by treatment with LC50 of tested essential oils were also studied. Bioassay technique was performed using thin film to estimate LC25, LC50 and LC90 values. Results showed that, T. foenum graecu was the most effective oil followed by S. indica, E. camaldulensis and finally N. sativa. As regards to biochemical changes induced by treatment with LC50 of each oil. Remarkable reduction in acetyl cholinesterase (AChE) enzyme was recorded in T. foenum graecu and N. Sativa treatments. However E. camaldulensis and S. indica induced significant elevation in glutamate oxaloacetate transaminase (GOT) enzyme, while glutamic pyruvic transaminase (GPT) reported significant elevation in all treatments. Remarkable reduction in total protein content was observed in N.sativa treatment. Whereas, treatment with T. foenum graecum oil induced significant increase in total protein content.
In conclusion, results indicated that the plant essential oils had insecticidal effect and also showed adverse effect on the tested biochemical parameters, suggesting the possibility of using them as an alternative to conventional insecticides for cotton leafworm control.
Keywords
Plant essential oils; Spodoptera littoralis; Toxicity; AChE; GOT; GPT; total protein
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