The concept of an environmental weed is discussed in relations to management strategies of invasive alien plants. Environmental weeds have been defined as those introduced plants which have become naturalized and have invaded natural ecosystems, i.e. ecosystems dominated by native plants. The plants invade native ecosystems and adversely affect the survival of indigenous flora and fauna, can compete with indigenous plants for resources such as space, nutrients, moisture and light. Impacts of invasions of aliens on ecosystem structure and function, as well as on native biodiversity, such as, are often uncritically over-evaluated. This environmental and/or conservative approach have evolved a strong critique of invasion biology as a science. Application of the concept of (agricultural) weed as unwanted plants for introduced and invasive alien plants is not acceptable because of differences between weeds and invasive plants in origine (evolution), condition (habitat, environment) and impacts. Negative impact criterion in definition of the weed is ambiguous. The author suggested and recommended to avoid the weed concept and terminology in invasion biology.