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Background <p>Dengue is a rapidly expanding vector-borne disease transmitted primarily by <i>Aedes</i> mosquitoes, which often breed in artificial containers. Urban construction sites, with their abundance of water-holding surfaces, are increasingly recognized as key breeding habitats. This study presents the first field-based evaluations of how specific construction materials, particularly cement types, influence mosquito oviposition behavior.</p> Method <p>A seven-month field-based, randomized controlled experiment (September 2024–March 2025) was conducted across three Grama Niladhari divisions (Kolonnawa, Salamulla, and Orugodawatta) in Colombo District, Sri Lanka. A total of 480 ovitraps using four substrate types, Control (plastic), Blended Hydraulic Cement (BHC), Ordinary Portland Cement (OPC), and Portland Limestone Cement (PCC), were deployed in indoor (<i>n</i> = 4) and outdoor (<i>n</i> = 4) settings at 20 randomly selected households per GN division. Water quality parameters (pH, turbidity, conductivity) were recorded at trap placement. Egg counts were analyzed using a Zero-Inflated Negative Binomial (ZINB) regression model.</p> Results <p>Traps containing BHC and PCC substrates had significantly fewer eggs than controls (BHC: β = -0.402, <i>P</i> = 0.014; PCC: β = -0.527, <i>P</i> = 0.001) and showed a higher likelihood of zero-egg presence (BHC: β = 1.025, <i>P</i> = 0.002; PCC: β = 0.941, <i>P</i> = 0.003). Outdoor traps had higher egg counts than indoor ones (β = 0.326, <i>P</i> = 0.021). Among water quality factors, only conductivity was significantly associated with egg counts (<i>P</i> = 0.036).</p> Conclusion <p>The BHC and PCC cement types significantly deterred <i>Aedes</i> oviposition compared to other substrates, indicating that construction materials can influence mosquito breeding behavior.</p>

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Oviposition response of Aedes mosquitoes to different cement types: a field-based study in urban Sri Lanka

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月13日

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  • Yasodha Ranasinghe,
  • Nayana Gunathilaka,
  • Deshaka Jayakody,
  • Wasana Rodrigo

摘要

Background

Dengue is a rapidly expanding vector-borne disease transmitted primarily by Aedes mosquitoes, which often breed in artificial containers. Urban construction sites, with their abundance of water-holding surfaces, are increasingly recognized as key breeding habitats. This study presents the first field-based evaluations of how specific construction materials, particularly cement types, influence mosquito oviposition behavior.

Method

A seven-month field-based, randomized controlled experiment (September 2024–March 2025) was conducted across three Grama Niladhari divisions (Kolonnawa, Salamulla, and Orugodawatta) in Colombo District, Sri Lanka. A total of 480 ovitraps using four substrate types, Control (plastic), Blended Hydraulic Cement (BHC), Ordinary Portland Cement (OPC), and Portland Limestone Cement (PCC), were deployed in indoor (n = 4) and outdoor (n = 4) settings at 20 randomly selected households per GN division. Water quality parameters (pH, turbidity, conductivity) were recorded at trap placement. Egg counts were analyzed using a Zero-Inflated Negative Binomial (ZINB) regression model.

Results

Traps containing BHC and PCC substrates had significantly fewer eggs than controls (BHC: β = -0.402, P = 0.014; PCC: β = -0.527, P = 0.001) and showed a higher likelihood of zero-egg presence (BHC: β = 1.025, P = 0.002; PCC: β = 0.941, P = 0.003). Outdoor traps had higher egg counts than indoor ones (β = 0.326, P = 0.021). Among water quality factors, only conductivity was significantly associated with egg counts (P = 0.036).

Conclusion

The BHC and PCC cement types significantly deterred Aedes oviposition compared to other substrates, indicating that construction materials can influence mosquito breeding behavior.