Insecticide susceptibility in larval populations of the West Nile vector Culex pipiens L. (Diptera: Culicidae) in Saudi Arabia

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• 作者：Al Thabiani Aziz¹ ; ^{aalthbyani@ut.edu.sa" class="auth_mail" title="E-mail the corresponding author} ; Jazem Abdullah Mahyoub² ; Hasibur Rehman¹ ; Shalini Saggu¹ ; Kadarkarai Murugan³ ; Chellasamy Panneerselvam¹ ; Majed Salum S. Alrefaei² ; Marcello Nicoletti⁴ ; Hui Wei⁵ ; Angelo Canale⁶ ; Giovanni Benelli⁶
• 关键词：Acute toxicity ; Biosafety ; Carbamates ; Larvicides ; Mosquito control programs ; Pyrethroids
• 刊名：Asian Pacific Journal of Tropical Biomedicine
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：6
• 期：5
• 页码：390-395
• 全文大小：992 K

文摘

To investigate the susceptibility to some conventional and non-conventional insecticides in laboratory and field larval populations of the West Nile vector Culex pipiens L. (Cx. pipiens), the dominant species in Jeddah Province, Saudi Arabia.

Methods

The tested conventional insecticides were Actikil and Pesgard, while the non-conventional ones were Bacilod, Dudim and Baycidal. Probit analysis and photomicroscopical observations were carried out to shed light on acute toxicity in laboratory and field Cx. pipiens strains.

Results

Cx. pipiens were more susceptible to Pesgard (LC₅₀: 0.045 and 0.032 mg/L) than Actikil (0.052 and 0.038 mg/L) and Bacilod (0.129 and 0.104 mg/L), for the field and laboratory strains, respectively. Results showed that treatments with the chitin synthesis inhibitor Dudim and Baycidal evoked morphological effects similar to those induced by other insect growth regulators. According to IC₅₀ values obtained (concentration which to inhibit the emergence of 50% of mosquito adults), the compound Dudim (0.000 3 and 0.000 1 mg/L) was more effective against Cx. pipiens L. mosquitoes than Baycidal (0.000 4 and 0.000 3 mg/L) for both the field and laboratory strains, respectively.

Conclusions

Our results provide baseline data to enhance control programs and orient public health decisions on the selection of pesticides against mosquito vectors in Saudi Arabia.