A review on bio-efficacy of inorganic inert matters on stored grain insect pest Sitophilus oryzae L

A number of insect pests attack stored grains, but Sitophilus oryzae L. (Coleoptera: Curculionidae) has got economic importance and it is the most destructive insect pest of the stored raw cereal grains in the world. Sitophilus oryzae causes substantial storage losses to the grains. As S. Oryzae has been reported to develop resistance to synthetic insecticides, in many areas of the World locally available inorganic inert matters have been used to protect the stored product against damage by insect attack. These products are usually non-phytotoxic, nontoxic to mammals, eco-friendly, less prone to pesticide resistance and relatively less expensive. Several technologies are available with the utilization of local technologies but the use of locally available inert or raw materials in practices is meager. Hence significant research work is required to carry out indigenous practices for protecting the stored products from the attack of stored grain insect pests.