Larvicidal Activities of

Area of Science:

• Medical Entomology
• Phytochemistry
• Environmental Toxicology

Background:

• Mosquitoes transmit filariasis, a significant global health concern.
• Synthetic insecticides pose risks to non-target organisms and the environment.

Purpose of the Study:

• To evaluate the larvicidal efficacy of Allium sativum and Zingiber officinale extracts against filariasis vectors.
• To identify effective plant extracts as natural alternatives for mosquito control.

Main Methods:

• Larvicidal activity assay of aqueous, ethanol, and methanol extracts of A. sativum and Z. officinale against mosquito larvae.
• Phytochemical analysis of plant extracts.
• Probit analysis to determine LC50 values and Chi-squared test for significance.

Main Results:

• Identified Anopheles and Culex species as filariasis vectors.
• Detected phytochemicals including flavonoids, phenols, and saponins in the extracts.
• A. sativum methanol extract showed the lowest LC50 (53 ppm) against Culex quinquefasciatus.
• Ethanol extract of A. sativum demonstrated significant larvicidal effects against Anopheles funestus and Cx. quinquefasciatus.

Conclusions:

• Allium sativum extracts exhibit higher larvicidal toxicity than Zingiber officinale extracts against filariasis vectors.
• Plant-derived extracts offer a promising eco-friendly approach to mosquito control, reducing reliance on synthetic chemicals.
• Further research is needed to assess toxicity across different vector life stages.