Solanum viarum is an aggressive perennial shrub native to Brazil and Argentina, that has been introduced to other parts of South America, North America, Africa and Asia. The primary means of dispersal seems to be by livestock (cattle) and wildlife, such as raccoons, deer, feral hogs and birds that feed on its fruits. Intra- and inter- county and state movement of livestock that have recently fed on Solanum viarum may be the primary vector for its spread. However, contaminated hay, seeds and bags of manure for composting also serve as a means for its dispersal.
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