Descripción
In Cambodia, the increasing scarcity of rural labour is pushing farmers to find ways to manage large rice fields with meagre resources and continuously emerging crop management constraints, especially for weed control. Out-migration of rural labour has resulted in a shift from manual transplanting to direct-seeded rice (DSR) and this has changed the spectrum of weed species and made weed management more difficult in rice. This publication describes important weeds of rice in Cambodia, weed seed contamination in rice seed for sowing, weedy rice contamination in paddy and options for Integrated Weed Management (IWM). The elements of IWM include: cultural practices; stale seedbed; crop establishment methods; crop rotation; water management and chemical weed control.