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Striga asiatica
Asiatic witchweed (''Striga asiatica'') is a hemiparasitic plant in the broomrape family. It is native to Asia and sub-Saharan Africa,〔
〕 but has been introduced into other parts of the world including Australia and the United States. Witchweed is a serious agricultural pest as it parasitises important crop species, including corn, rice, sorghum, and sugar cane, often causing substantial yield reductions.〔(USDA )〕
In the USA, witchweed was discovered in the Carolinas in 1955. It is considered an invasive agricultural pest, and a vigorous eradication campaign has reduced the affected area by 99% ( to about ).〔(Global Invasive Species Database )〕
Biological control can be achieved by growing a ''Desmodium'' (tick-trefoil) undercrop (see push–pull technology). The trefoil can be used as green manure or animal fodder after the harvest.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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