Larvicidal Activity of Nano- Encapsulated Lambda – Cyhalothrin Against Susceptible Mosquito Larvae (Culex Pipiens) in Comparison with Conventional form
Desheesh, M., El-Masry, D., Fargand, M., Youssef, H. (2019). Larvicidal Activity of Nano- Encapsulated Lambda – Cyhalothrin Against Susceptible Mosquito Larvae (Culex Pipiens) in Comparison with Conventional form. EKB Journal Management System, 40(OCTOBER- DECEMBER), 568-573. doi: 10.21608/asejaiqjsae.2019.58477
Mohamed A. Desheesh; Doaa M. El-Masry; Mahmoud M. Fargand; Hamada M. Youssef. "Larvicidal Activity of Nano- Encapsulated Lambda – Cyhalothrin Against Susceptible Mosquito Larvae (Culex Pipiens) in Comparison with Conventional form". EKB Journal Management System, 40, OCTOBER- DECEMBER, 2019, 568-573. doi: 10.21608/asejaiqjsae.2019.58477
Desheesh, M., El-Masry, D., Fargand, M., Youssef, H. (2019). 'Larvicidal Activity of Nano- Encapsulated Lambda – Cyhalothrin Against Susceptible Mosquito Larvae (Culex Pipiens) in Comparison with Conventional form', EKB Journal Management System, 40(OCTOBER- DECEMBER), pp. 568-573. doi: 10.21608/asejaiqjsae.2019.58477
Desheesh, M., El-Masry, D., Fargand, M., Youssef, H. Larvicidal Activity of Nano- Encapsulated Lambda – Cyhalothrin Against Susceptible Mosquito Larvae (Culex Pipiens) in Comparison with Conventional form. EKB Journal Management System, 2019; 40(OCTOBER- DECEMBER): 568-573. doi: 10.21608/asejaiqjsae.2019.58477

Larvicidal Activity of Nano- Encapsulated Lambda – Cyhalothrin Against Susceptible Mosquito Larvae (Culex Pipiens) in Comparison with Conventional form

Alexandria Science Exchange Journal
Article 2, Volume 40, OCTOBER- DECEMBER - Serial Number 4, December 2019, Page 568-573  XML PDF (341.6 K)
Document Type: Original Article
DOI: 10.21608/asejaiqjsae.2019.58477
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Authors
Mohamed A. Desheesh* 1; Doaa M. El-Masry* 1; Mahmoud M. Fargand* 2; Hamada M. Youssef* 1
1Department of Chemistry of Pesticides and Technology, Faculty of Agriculture, University of Alexandria.
2Sabahia Research Station, Agricultural Research Center, Alexandria.
Abstract
Encapsulated lambda – cyhalothrin nanoparticles loaded in polyethylene glycol were prepared by melt dispersion method in concentration 4% and 8% of their tested conventional lambda.Larvicidal activity of encapsulated lambda nanoparticles was investigated in comparison with its conventional form against susceptible larvae of Culex pipeins after 24, 48 and 72 hrs. exposure periods. The conventional lambda showed LC50 values equal 7 ×10-8, 1.8 ×10-8and 1 ×10-9M, during the exposure time, respectively. The reduced tested concentrations of nanoparticles (4% and 8%) were highly toxic against mosquito larvae with LC50 values equal 4.6×10-8, 2.9 ×10-9and 7.8 ×10-10M (for 4%) and 1.8 ×10-8,5.3×10-9 and 1.2×10-9M (for 8%) after 24, 48 and 72 hrs. of exposure periods, respectively. The toxic effects of the low concentrations from lambda nanoparticles against Culex pipens may be due to the diffusion released of cyhalothrin with amounts equal 1.84 ×10-9, 1.16×10-10 and 3.12×10-11 (in case of 4%) and 1.44×10-9, 4.24×10-10 and 9.6×10-11 M (for 8%) after 24,48 and 72 hrs., respectively. These results proposed that the encapsulated lambda-cyhalothrin nanoparticles can serve as an effective larvicide against Culex pipeins larvae at lawer concentrations avoiding the different problems of conventional form.
 
Keywords
lambda-cyhalothrin; poly ethylene glycol; susceptible Culex pipiens larvae
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