Pesticides are being used in agriculture to manage pests for better yield and production. However, due to evaporation, rains, photodegradation, hydrolysis and other factors, often pesticides are lost before achieving the goal. Pesticides used in large quantities to manage pests often leads to serious environmental pollution and human toxicity. The recent nano pesticides are one promising way to do so efficiently and try to overcome such problems. Nano pesticides are entities in the nm size (range up to 100 nm) and claimed to exhibit novel properties associated with the small size of their components. The principal objectives of nano pesticide formulations are to increase the solubility of active ingredients (a.i.), to release the a.i. in a slow and targeted manner and to protect the a.i. against premature degradation. Some of the successful examples of nano-formulations viz., acetamiprid loaded alginate-chitosan nanocapsules can be used in any type of soil due to its higher stability and controlled release at all the pH ranges. The nanoemulsion formulation of eucalyptus oil ensures higher efficacy as a larvicide and can be used as a safe and effective alternative in the control of vector-borne diseases caused by mosquitoes. Nano-based insecticidal formulations exhibit many benefits over conventional formulations such as highly targeted delivery, high efficiency, smart controlled release options, and environment friendly. However, further studies need to be considered to validate the proposed nano pesticides in field conditions, monitoring at the same time, their stability, fate in the environment and sublethal effects on non-target organisms.