Tribolium confusum is a Serious pest to agricultural crop produces infesting cereals, and many other food products, thus causing heavy damage to the food stuffs and useless for human consumption. Hence an attempt was made to control the stored products pest by using medicinal plant extract Vitex negundo. The protein content in the Haemolymph increased gradually in the larvae, pupae and the adults of Tribolium confusum, whereas in the Vitex negundo treated resultant larvae there was a prominent decrease in the protein content when compared with the controls.