Weed management in direct-seeded rice systems

Titel:  Weed management in direct-seeded rice systems
Author: Bhagirath Singh Chauhan

Direct -seeded rice systems have several advantages. Weeds, however, are considered one of the major biological constraints in these systems because there is no seedling size advantage as rice and weed seedlings emerge simultaneously and no standing water to suppress weed emergence and growth at crop emergence. Weeds in direct-seeded systems can cause a substantial rice yield loss. Weeds are mainly controlled using herbicides or are manually controlled. However, manual weeding is becoming less common because of the nonavailability of labor at critical times and increased labor costs. Herbicides are replacing manual weeding as they are easy to use; however, there are concerns about the sole use of herbicides, such as evolution of resistance in weeds, shifts in weed populations, and concerns about the environment.

There is a need to integrate different weed management strategies to achieve effective and sustainable weed control in direct-seeded rice systems. This publication describes different strategies, including preventive and cultural approaches, to manage weeds in these systems. This information will help researchers and extension specialists to develop integrated weed management programs for direct-seeded rice systems.

Thanks to: http://irri.org/

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