Laura Nyawira Wangai
Background: Malaria interventions particularly malaria vector control has gained popularity within the last twenty years. Sumitomo Chemical Company has developed a larvicide, Sumilarv 0.5G, based on the insect growth regulator -pyriproxyfen. SumiLarv 0.5G, unlike other larvicides, it has a novel mode of action and does not kill the larvae but prevents the emergence of adults by affecting the development of the larval and pupal stages. The study aimed at evaluating efficacy of Sumilarv 0.5G, an insect growth regulator - pyriproxyfen, against mosquito larvae in Kenya.
Methodology: Laboratory and field trials were carried out to determine the efficacy and residue effect of Sumilarv 0.5G against all mosquito species for the purpose of registration and use of this product in Kenya.
Results: Dosage of 2 g per 1000 liters of water was found to be effective in preventing adult mosquito emergence. The concentration of 2 g per 1000 liters measured as one teaspoonful was found to prevent re-infestation of the water by mosquitoes for a period of three months.
Conclusion: Sumilarv is recommended as a larvicide for the control of mosquito larvae and pupa if applied at above concentrations.
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