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Is there any critical period when weeds can be effectively controlled in direct seeded rice or bed planted rice?

April 26, 2017bed controlled critical period PLANTED rice seeded weeds

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Is there any critical period when weeds can be effectively controlled in direct seeded rice or bed planted rice?

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Initial 2-3 weeks are critical for control of weeds in DSR. After the crop emerges, we need to flood the fields for 10-15 days. This practice takes care of most weeds after pre-emergence application of grassy herbicides.