Studies on the invasion processes of horsenettle (Solanum carolinense L.) via seeds in pastures
2007
Nishida, T.(National Inst. for Agro-Environmental Sciences, Tsukuba, Ibaraki (Japan))
Horsenettle (Solanum carolinense L.) is native to the Gulf States in the United States. It is a perennial weed that propagates by its seeds, roots and root cuttings. The plant has conspicuous spine-like prickles on the stems and leaves. It is also considered to be poisonous due to its solanine content. It is a troublesome weed in various types of crops such as corn, small grains and vegetables, as well as pastures in North America. Problems associates with this weed in pastures in Japan became noticeable in the 1970's, but occurrences of the weed were considered to have been restricted to small areas. However, it has become apparent that the area in which horsenettle can be found is expanding. It is difficult to control the weed with ordinary pasture management practices such as grazing and cutting. Some of herbicides are effective in controlling the weed, but they are not practical in terms of the cost or efficiency. Therefore, the most efficient means of avoiding the negative effect of horsenettle is to prevent the weed from invading and being established in new areas.
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