Imperata cylindrica (L.) Raeuschel is a troublesome and noxious perennial rhizomatous grass weed found on all continents in the tropics and parts of the sub-tropics. It is particularly a problem in high rainfall areas of South-East Asia and West Africa. It occurs in perennial crops such as rubber, tea, oil palm, coconuts and teak plantations as well as annual food and industrial crops such as m…