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Study on the effects of water pH on survival rate, life cycle and size of Culex mosquitoes
Organization(s):Princess Chulabhorn Science High School Trang
Country:Thailand
Student(s):Mr.Porpeang payuhasenarak
Mrs.Peangpor payuhasenarak
Mrs.Jirapan Noosawat
Grade Level:Middle School (grades 6-8, ages 11-14)
GLOBE Educator(s):PACHAREE CHAIPETCH
Contributors:
Report Type(s):International Virtual Science Symposium Report, Mission Mosquito Report
Protocols:Mosquitoes, pH
Presentation Video:
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Language(s):English
Date Submitted:03/05/2025
This research aimed to know the survival rate of mosquito larvae and pupa and the life cycle of Culex mosquitoes, including the size of larvae, pupa and Culex mosquitoes when raised in water with a pH value of 4-9. The results from the study of water pH values affecting the survival rate, life cycle and life of Culex mosquitoes found that different pH values had a statistically significant effect on the survival rate at .05. Larva could not survive at pH 4, but could survive in pH 9 for the longest number of days, pH 8, 7, 6 and 5, respectively. pupa could survive in pH 8 and 9 the longest and survive in pH 5 the least. Mosquitoes could survive in pH 7 and 8 the longest and survive in pH 5 the least. The life cycle of Culex mosquitoes was found to be significantly different at different pHs at .05. The longest life cycle of Culex mosquitoes was found at pH 9. When studying the size of mosquitoes, it was found that they were statistically significant different at .05. The adult stage of mosquitoes had the least value at pH 5, while pH 8 and 9 had the most values. It was also found that the Culex mosquito can survive in water with different pH values. From the experimental results, it can be seen that when the pH value of the water in mosquito breeding grounds changes slightly, it can affect the life cycle of the Culex mosquitoes.