Bio-pesticide extracted from garlic oils to control mosquito approach -

Bio-pesticide extracted from garlic oils to control mosquito approach

Ovicidal, larvicidal, pupicidal, adulticidal and spatial repellency assays showed the broad activity of garlic oil against all Aedes aegypti life stages. Garlic oils are unique as insecticides in that they affect eggs, larvae and pupae, which commonly coexist at mosquito breeding sites. These results, together with its endurance in simulated field trials and the industrial production of garlic oil, highlight its suitability for integrated mosquito vector control programs. Evidence shown in this study suggests that alterations in garlic oil composition may not significantly affect its broad activity providing the final concentration of diallyl polysulfides remains unchanged. The activity and stability data of isolated diallyl polysulfides and garlic oil polysulfide mixtures suggests isolation efforts may not result in higher potency. Lack of persistency in the environment, mainly due to high volatility, demands technological development of garlic oil to explore its commercial use against Aedes aegypti. Mixing garlic oil with other essential oils or scented volatile compounds to address the characteristic aroma would enable indoor and outdoor garlic oil applications. The results of this study suggest the promising application of garlic oils to control mosquito approach to humans, either as spatial repellents, immature stage control or mosquitocidal agents, providing low persistency and aroma can be technologically addressed.

Citation:

Dusi, R.G., da Silva Morais, L., Magalhães, N.M.G., Albernaz, L.C., Hamilton, C.J. and Espindola, L.S., 2022. Potential of garlic oil as a biopesticide against all Aedes aegypti life stages. Industrial Crops and Products, 181, p.114780.