Allelopathy is the science that studies processes in which secondary
metabolites from plants and microorganisms are involved, affecting growth and development of biological systems
(Qiming et al., 2006). The use of secondary metabolites
implicated in allelopathic interactions as sources for news
agrochemical models could satisfy the requirements for crop
protection and weed management (Singh et al., 2003). Weeds
may be defined as plants with little economic value and possessing
the potential to colonize disturbed habitats or those
modified by human activities. According to an estimate, in
US alone, weeds cause a loss on the crop production in the
range of 12% (Pimentel et al., 2001). As per Agrow report,
the total value of world’s agrochemical market was between
US$31–35 billion and among the products herbicides
accounted for 48% followed by fungicides (22%)