Red flour beetle, Tribolium castaneum is a cosmopolitan insect damaging stored food products and cause severe loss. The use of chemical insecticides leads to resistant development in insects and not safe for environment. An alternative method is required to manage this insect without ill-effect to the human being and environment. The botanicals having repellent or insecticidal property will be an alternative method of managing this insect. The acetone and aqueous extracts of six medicinal plants viz., Aloe vera (Kattarvazha), Ocimum tenuiflourm (Tulsi), Azadirachta indica (Neem) Thymus vulgaris (Thyme) Piper betel (Betel leaf) Acalypha indica (Kuppaimeni) against T. castaneum (Herbst) (Coleoptera: Tenebrionidae) were evaluated for their repellent activities. The various concentrations (2, 4 and 8%) of the plant extracts were used to conduct repellency test using area preference test of adult beetles after fixed period intervals (4, 6 and 8 h). The results revealed that the aqueous and acetone extract of Neem and Kuppaimeni were shown more repellency (90 – 100%) against adult insects. Thus, Gas Chromatography Mass Spectroscopy analysis has been performed for the aqueous extract of these two most repellent plants. The aqueous extract of neem containing Phytol (47.72% peak area) can be considered as repellent. Kuppaimeni leaves containing Myo-Inositol, 4-C-methyl- (24.61% peak area) can also be a promising repellent. These findings confirmed that plant extracts can be a suitable alternative for chemicals in managing stored product insects.