An esculent weed may still be a disrupter of natural ecosystems. A weed that is extensively cultivated and can disperse on 18 wheels, thence from kitchen refuse as well as by microscopic aerospores having great potential range, is not amenable to control. . . . The consequence of these germ plasm invasions is that the native gene pool is diminished both by displacement (competition) and by dilution (interbreeding).
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