Mosquito-borne diseases such as malaria, dengue, and chikungunya remain major global health challenges, further exacerbated by escalating insecticide resistance and ecological risks linked to synthetic agents. This review highlights the potential of seaweed-derived nanoparticles (NPs) as sustainable biopesticides for vector control. While multiple types of seaweed-mediated NPs have been reported, particular emphasis is placed on silver nanoparticles (AgNPs), given their dominance in the literature, with additional coverage of TiO2, ZnO, and AuNPs for broader context. Synthesized via green chemistry approaches using marine macroalgal metabolites such as polyphenols, flavonoids, and polysaccharides, these NPs exhibit potent larvicidal, adulticidal, and ovicidal effects against major mosquito vectors, including Aedes, Anopheles, and Culex species. Mechanistic studies reveal that seaweed-mediated NPs impair mosquito physiology through midgut epithelial disruption, oxidative stress induction, enzyme inhibition, reproductive interference, and apoptosis. Their nanoscale dimensions and multi-targeted actions reduce the likelihood of resistance development, while low toxicity toward non-target organisms and efficient biodegradability enhance ecological compatibility. Comparative evaluations suggest that seaweed-derived NPs often match or surpass conventional insecticides in efficacy under laboratory settings, with distinct advantages in environmental safety. Nonetheless, limitations persist, including the absence of standardized synthesis protocols, limited field trials, and insufficient data on long-term ecological impacts. Future research should focus on scalable synthesis, comprehensive toxicological evaluation, and integration into existing vector management frameworks. By uniting marine biotechnology with nanoscience, seaweed-derived NPs represent a promising, eco-safe alternative for mosquito control with implications for global health and environmental sustainability.
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