IMPACT OF PHYSICOCHEMICAL PARAMETERS IN THE DEVELOPMENT OF Culex quinquefasciatus Say LARVAE IN THEIR BREEDING SITES IN MONO AND COUFFO DEPARTMENTS IN SOUTH-WESTERN REPUBLIC OF BENIN, WEST AFRICA

Mindégnisèa Habib Tamègnon; Lègba Nazaire Aïzoun; Armelle Sabine Yélignan  Hounkpatin; Raymonde Arlette  Fifamey Adjatin; Chèpo Daniel Chougourou

doi:10.22270/ujpr.v10i6.1454

Mindégnisèa Habib Tamègnon Laboratory of Pluridisciplinary Researches of Technical Teaching (LaRPET), Normal High School of Technical Teaching (ENSET) of Lokossa, National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM) of Abomey, Benin.
Lègba Nazaire Aïzoun Laboratory of Pluridisciplinary Researches of Technical Teaching (LaRPET), Normal High School of Technical Teaching (ENSET) of Lokossa, National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM) of Abomey, Benin.
Armelle Sabine Yélignan Hounkpatin Laboratory of Pluridisciplinary Researches of Technical Teaching (LaRPET), Normal High School of Technical Teaching (ENSET) of Lokossa, National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM) of Abomey, Benin. Laboratory of Hygiene, Sanitation, Toxicology and Environmental Health (HECOTES), Cotonou, Interfaculty Center for Environmental Training and Research for Sustainable Development (CIFRED), University of Abomey-Calavi (UAC), Benin.
Raymonde Arlette Fifamey Adjatin Laboratory of Genetics, Biotechnology and Applied Botany (GEBBA), National High School of Biosciences and Applied Biotechnology of Dassa-Zoumè, National University of Sciences, Technologies, Engineering and Mathematics of Abomey.
Chèpo Daniel Chougourou Department of Environment Genius, Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, Cotonou, Benin.

10.22270/ujpr.v10i6.1454

Keywords:

Benin, Culex quinquefasciatus, larval development, physicochemical parameters

Abstract

Background and Aims: Lymphatic filariasis is a disease of great public health importance. The current study aims to establish the correlation between the presence of physicochemical parameters in breeding sites of Culex quinquefasciatus and the larval development.

Methods: Culex quinquefasciatus mosquito larvae were collected from September to November 2024 during the small rainy season and from March to July 2025 during the great rainy season in two districts of Mono department which were Lokossa and Comè and in two districts of Couffo department which were Dogbo and Djakotomey. Then, the measurements of physicochemical parameters in breeding sites were done in laboratory using a spectrophotometer DR5000. The other methods employed were: Thermometric, Potentiometric, and Electrical conductometric.

Results: The results showed that the breeding sites with higher physicochemical parameters such as: conductivity, total dissolve solids, total hardness, dissolved oxygen and alkalinity conferred the development to Culex quinquefasciatus larvae. However, there was a negative correlation between some parameters such as Turbidity and Salinity and Culex quinquefasciatus larval development. Different ions such as Ammonia, Calcium, Magnesium, Iron and Total Phosphate were present in Culex quinquefasciatus larval habitats and served as nutrient composition to the larvae.

Conclusion: The breeding sites of Culex quinquefasciatus are influenced by many physicochemical parameters and there is a relationship between the presence of physicochemical parameters in Culex quinquefasciatus breeding sites and the development of these mosquito larvae.