**11. Residual effect of encapsulated herbicide formulation**

Encapsulation of herbicides exhibits the same herbicidal activity at a lower dose as compared to its conventional formulation. Controlled release formulation reduced the amount of active ingredient applied to the environment thus reducing the residue buildup in agro-ecosystem. Herbicide encapsulation conferred the controlled release of active material to maintain the threshold level of herbicides for an extended period to control weeds [164]. Encapsulated herbicide formulation was not active in soil to affect the succeeding crop [165]. Residual effect of poly (ε-caprolactone) based atrazine formulation was validated on soybean plants [94]. The results showed that nanoformulation enhanced the short-term without causing a long-term residual effect.

*Polymeric Systems for the Delivery of Herbicides to Improve Weed Control Efficiency DOI: http://dx.doi.org/10.5772/intechopen.104629*
