IntroductionThe term "allelopathy" was introduced in early 1937 by Molisch when he discovered that both harmful and beneficial biological interactions existed between all plants and microorganisms (Rivzi 1). His discovery helped Rice provide a clearer definition of allelopathy. According to Rice, allelopathy is any effect (beneficial or harmful) of one plant or microorganism on another through the excretion of chemical compounds into the environment (Rivzi 1). Since then, much research has been conducted to determine the beneficial and detrimental impacts of allelopathy on agricultural practices. For example, Bellard, McCarthy, and Meekins studied the genetic variation and biogeography of Alliaria petiolata in North America on January 1, 2001. According to their findings, Alliaria petiolata varied not only in phenology, but also in morphology across native plants where he grew up (Bellard, McCarthy, and Meekins 161). They also found that Alliaria petiolata also varied in terms of seed dormancy. In their results, they also establish that Alliaria petiolata is a hexaploid plant species based on n=7. In addition to the findings of Bellard, McCarthy, and Meekins, Hanson and McCarthy also argue that Alliaria petiolata is one of the plant species that has contributed to the loss of many indigenous plants in North America. They state that Alliaria petiolata is a non-native plant species belonging to the Brassicaceae family (Hanson and McCarthy 68). According to them, it was first identified in North America in early 1868. Unlike other Brassicaceae, Hanson and McCarthy hypothesize that Alliaria petiolata spreads very rapidly in the introduced environment due to its monopolization of resources. To justify their point... half of the article ......it says that Alliaria petiolata does not manipulate the carbon and nutrient content of the soil or colonize the roots of other plants. Works Cited Blazevic, Ivica and Mastelic Josip. “Free and bound birds of garlic mustard (Alliaria petiolata).” Croatian. Chemistry. Act 81(4). (2008): 607-613. Print.Bossdorf, Oliver and Prati Daniel. “Allelopathic inhibition of germination by Alliaria petiolata (Brassicaceae). American Journal of Botany. 2003. Print.Hanson, Sheryl and McCarthy Brian. “An evaluation of the allelopathic potential of the invasive weed Alliaria petiolata (Brassicaceae).” 1998. Meiners, Scott and Pisula Nikki. “Relative allelopathic potential of invasive plant species in a young, disturbed forest.” The Journal of the Torrey Botanical Society. 2010. Print.