Biorational pesticides, natural products

Examination of the various classified listings of herbicides provides iasight iato the processes and approaches that lead to the discovery of new pesticides. The four principal development approaches are random screening, imitative chemistry, testing natural products, and biorational development. 

Methods by which to find a biologically active compound may be classified as (a) random selection/screening (b) directed synthesis (c) natural product models and (d) biorational design. Allelochemical research can be considered as a natural product model. Generally, natural pesticides such as allelochemicals can be the biological compound(s) itself or products or parts of plant tissues. 

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