AMERICO Larvicidal Oil (Anti-Malarial Oil)
AMERICO Larvicidal Oil is a first-grade larvicidal oil containing a non-ionic surfactant, formulated to control mosquito larvae and pupae in standing water. Once spread on water it forms a thin oil film that suffocates larvae and pupae — one of the few larvicides effective against both stages. No dilution is needed: simply spray onto stagnant water surfaces, using very little product. The oil film is rapidly broken down by sunlight and microorganisms into harmless substances, so environmental impact is low. Meets World Health Organization (WHO) specification SIF/23. 100% made in Singapore.
Key features
How it works
Larvicidal oil is a specially refined petroleum for mosquito control, suitable for environments where standing water cannot be removed and mosquitoes breed. Because it spreads through the water and then forms a thin film on the surface, only a very small amount is needed.
The oil works mainly by suffocating larvae and pupae — it is the only larvicide that effectively controls both mosquito larvae and pupae. As the oil is rapidly broken down by sunlight and microorganisms into harmless substances, it should not cause significant environmental damage.
Because mosquitoes concentrate their growth in breeding sites during the larval stage, using a larvicide is an effective way to tackle mosquitoes at this stage and reduces the future need for adulticides. Larviciding should therefore always be considered first.
Typical characteristics
| Property | Product | HK Govt requirement | WHO SIF/23 |
| Specific gravity @30℃ | 0.822 | 0.940 (max) | 0.940 (max) |
| Distillation recovered @200℃ (% vol) | 1.5 | 5.0 (max) | 5.0 (max) |
| Flash point (℃) | 76.7 | 65.8 (min) | 65.6 (min) |
| Kinematic viscosity @21.1℃ (cSt) | 4.2 | 10 (max) | 10 (max) |
| Spreading pressure (Dynes/cm) | 25–46 | 25 (min) | Grade 1 45 / Grade 2 25 (min) |
| Film stability (Hr) | Over 24 | 2 (min) | 2 (min) |
| Material soluble in water & oil layers (% vol) | 2 | — | 2.5 (max) |
| Mortality rate on mosquito larva (Aedes Aegypti) % | *89 | — | 75 |
Composition
Gas Oil, Hydrocarbon Solvent, Surfactants. Pesticide registration no.: 2P276.
Safety & hazard information
One-stop pest control service
Established in 2009, Hong Kong Misting provides mosquito-control and integrated pest-management product supply, scheduled application and contract pest-control services. We welcome enquiries from property management, government departments, construction sites and institutions — our professional team will design a mosquito-control plan for your site.
Products are subject to change due to enhancements and continuous development.