来源： Bolfrey-Arku Undated In Ghana, Imperata cylindrica has
become a serious problem in forest, transition and coastal
savanna areas, where human population pressure on land has
prevented the re-establishment of the forest vegetation. Forest,
forest-savanna-transition, and coastal savanna zones, which are
intensively cropped to cereals, legumes, vegetables, root and
tuber crops are prone to frequent burning, which contributes to
the dominance of the weed. The inability of the Ghanaian small-
scale farmer to effectively manage I. cylindrica has led to its
increased spread and, hence, a major constraint to food
production in those area (Bolfrey-Arku et al. Undated). In
Ghana, fifty-one percent of farmers reported of inadequate level
of control of Imperata cylindrica with current control
practices. Farmers relied mainly on manual methods of weed
control supplied mostly by family labor. Glyphosate was applied
on fields with > 50% cogon grass cover. Follow-up weed control
could be required 3-6 times/season depending