Abstract: The use of bio insecticides for the protection of crops certainly contributed to minimizing the losses in yield. The bio insecticides are carefully applied for reducing the population of the insects that damage the crops. Moreover, the advantage of using bio insecticides for agricultural purposes is to improve the growth of the plants and the roots for enhancing the micro flora of the soil and it results in the total production of agriculture. Moreover, they are less toxic than the other conventional pesticides as they do not contaminate the total environment. Bio insecticides are the type of organism that is given to agricultural crops plants for damaging pests. Moreover, they are used in destroying small pests and weeds. Bio insecticides are the biological method of controlling the insects and the pests that are damaging the crops.

Keywords : Chronic neurotoxicity, Food chain, nontoxicity .