Document Details
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Document Type |
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Thesis |
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Document Title |
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Determination of population density of mosquitoes in the field using the Clark traps with evaluation of some insecticides against Aedes aegypti in Jeddah Governorate. تقدير الكثافة الحقلية لمجتمعات البعوض باستخدام مصائد كلارك مع تقييم بعض المبيدات الحشرية ضد بعوض Aedes aegypti في محافظة جدة. |
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Subject |
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Biological |
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Document Language |
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Arabic |
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Abstract |
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The aim of this study was the determination of population density mosquitoes in the field, evaluation of some insecticides against Aedes aegypti, the vector of dengue fever in Jeddah Governorate.Field surveys of mosquitoes (Diptera: Culicidae) were carried out on several habitats of Jeddah Governorate, Saudi Arabia, During the period from January 2008 to December 2008 using the Clark traps. 348730 mosquitoes were collected in different times of this study. Adult mosquitoes were presented throughout the year with significant differences in the population density in different times of the survey of mosquitoes population four species were identified as major mosquitoes: Aedes, Culex, Anopheles and Ochlerotatus.Eighteen species of mosquitoes were collected, including two species of Aedes, five species of Culex, eleven species of Anopheles.During the survey, the collected mosquito species were: Ae. caspius, Ae. aegypti, Cx. pipiens, Cx. quinquefasciatus, Cx. tritaeniorhynchus, Cx. perexiguus, Cx. torrentium, An. subpictus, An. stephensi, An. rohdesiensis, An. culicifacies, An. thurkhudi, An. pharoensis, An. gambiae, An. multicolor, An. fluviatilis, An. d'thali, and An. sergenti. Abundance of mosquitoes were highest in may – 2008 and declining gradually until October – 2008. The study showed that the genus of Culex mosquitoes were the dominant form has a very high proportion of presence as represented by 99.95% followed by the second genus Aedes by 0.0315% and genus Anopheles and Ochlerotatus the same relative density by 0.0066%.The highest abundance of mosquitoes in Bohairh musk Lake, located in the eastern province of Jeddah , Mahmudiyah district had the lowest of numerical density of mosquitoes.The larvicidal activity of five insecticides against Aedes aegypti (L.) the primary mosquito vector of dengue fever in Jeddah Governorate was evaluated using the WHO standard susceptibility tests. These compounds were two chemical insecticides (Snap and Icon) , the bacterial insecticide Bacilod and two insect growth regulators ( Baycidal and Sumilarv).Taking LC50 values ( concentration which to kill 50% of mosquito larvae ) into consideration, mosquito larvae of Aedes aegypti proved to be more susceptible to Icon (0.01ppm) than Snap (0.048ppm) and bacilod (0.33ppm) by about 4.8 and 33 times, respectively. On the other hand, the results showed that treatments with the insect growth regulators Baycidal and Sumilarv against the present mosquito larvae of Ae. aegypti produced various biological effects on immature stages and adults. Therefore, in the present study , cumulative mortalities during larval development to pupae and adults have been taken as a criterion for evaluating the efficacy of Baycidal and Sumilarv against the test mosquito larvae of Ae. aegypti. According to IC50 values (concentration which to inhibit 50% the emergence of mosquito adults), the compound Baycidal (0.0007ppm) proved to be more effective against Ae. aegypti than Sumilarv (0.003ppm) by about 4.3 fold. Finally, the present research work suggested that consideration must be taken regularly to monitor the susceptibility level of local mosquito vectors to insecticides commonly used in control programs. Records on insecticide- susceptibility will provide baseline data for planning control programs and making good decisions about the use of insecticides for mosquito control in Jeddah Governorate. |
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Supervisor |
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Prof. Khaled Mohammed AL-Ghamdi |
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Thesis Type |
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Doctorate Thesis |
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Publishing Year |
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1430 AH
2009 AD |
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Added Date |
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Saturday, December 4, 2010 |
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Researchers
| حامد علي القحطاني | Al-Qahtani, Hamed Ali | Researcher | Doctorate | |
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