Occurrence Characteristics and Management of Invasive Weeds, Ambrosia artemisiifolia, Ambrosia trifida and Humulus japonicus
2021
Lee, I.Y. | Kim, S.H. | Hong, S.H.
Among 16 invasive alien plant species listed by National Institute of Ecology, common ragweed (Ambrosia artemisiifolia), giant leaf ragweed (A. trifida), and Japanese hop (Humulus japonicus) causes serious human health problems due to their pollen dispersal. In this review, we reviewed and summarized their distribution, occurrence, ecological threats and management methods. Since these weeds occur almost exclusively on nonagricultural land, cultural methods cannot be applied for management of these weeds. Instead, physical methods such as uprooting and cutting the stems during growth is preferred. Various chemical methods using herbicides can be practiced if herbicide use is allowed. Post-emergence application of glyphosate, glyphosate+2,4-D or glyphosate+dicamba was recommended, but not soil treatment herbicide. However, sole reliance on chemical herbicides may result in herbicide resistance and vegetation disturbance by killing non-target plant species. None of biological methods using mainly insects were practically applicable to the field, but continuous research efforts are required to develop more environmentally safe biological way of controlling invasive alien weeds.
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