Insecticidal properties of Mentha species: A review

In view of the environmental, food-safety and health related issues associated with the application of chemical insecticides, growing emphasis is being laid on insect-pest control through plant resources. Mentha (mint) is one of the most common herb which has been known for its medicinal and aromotherapeutic properties since ancient times and in the last few decades, its insecticidal potential has also been investigated. The present review consolidates studies concerning insecticidal activity of Mentha against various stored grain pests and vectors. Insecticidal properties of different Mentha species are commonly inherent in its essential oils or plant extracts which is correlated with their chemical composition. Insect/pest control potential of various Mentha species has been evaluated by conducting adulticidal, larvicidal and growth/reproduction inhibition bioassays. Fumigant and repellent activity of Mentha essential oil has been studied against several stored grain pests (Tribolium castaneum, Sitophilus oryzae, Acanthoscelides obtectus, etc.) and vectors. Nevertheless, studies exploring larvicidal and growth/reproduction regulatory activity of Mentha, are relatively less. Among the vectors, mosquitocidal activity of several Mentha essential oils and their constituents is established. However, the studies directed towards formulation or product development and performance assessment in actual field conditions are lacking. Hence, although a ground has been set based on the lab scale research investigations, field studies on these aspects are warranted to ensure wide scale application. (C) 2011 Elsevier B.V. All rights reserved.