INTEGRATED WEED MANAGEMENT IN RICE

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INTEGRATED WEED MANAGEMENT IN RICE Next End

INTEGRATED WEED MANAGEMENT IN RICE Nursery Apply any one of the Pre-emergence herbicides viz., Butachlor 2 l/ha, Thiobencarb 2/ha, Pendimethalin 2.5 l/ha, Anilofos 1.25 l/ha on 8th day after sowing to control weeds in the lowland nursery. Keep a thin film of water and allow it to disappear. Avoid drainage of water. This will control germinating weeds Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Transplanted Pre-emergence Use Butachlor 2.5 l/ha or Thiobencarb 2.5 l/ha or Fluchoralin 2 l/ha or Pendimethalin 3 l/ha or Anilofos 1.25 l/ha as pre-emergence application. Alternatively, pre-emergence application of herbicide mixture viz., Butachlor 1.2 l + 2,4-DEE 1.5 l/ha or Thiobencarb 1.2 l + 2,4-DEE 1.5 l/ha or Fluchoralin 1.0 l + 2,4-DEE 1.5 l/ha or Pendimethalin 1.5 l + 2,4-DEE 1.5 l/ha or Anilofos + 2,4-DEE ready mix at 1.25 l/ha followed by one hand weeding on 30-35 days after transplanting will have a broad spectrum of weed control in transplanted rice. (Cont)… Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Any herbicide has to be mixed with 50 kg of sand on the day of application (3-4 days after transplanting) and applied uniformly to the field in 2.5 cm depth of water. Water should not be drained for 2 days from the field or fresh irrigation should not be given. Wherever there is possibility of heavy weed infestation, herbicides can also be applied with neem coated urea which could serve as carrier, three to four days after transplanting instead basal application of N at last puddling. Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Post-emergence If pre-emergence herbicides are not used, hand weed on 15th day after transplanting. 2,4-D sodium salt (Fernoxone 80% WP) 1250 g dissolved in 625 l/ha of water is sprayed with a high volume sprayer, three weeks after transplanting or when the weeds are in 3-4 leaf stage. Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Late hand weeding Hand weed a second time, 80-85 days after transplanting,if necessary. Wet seeded rice In wet seeded rice apply Thiobencarb at 2.5 l/ha or Pretilachlor 0.9 l/ha on 4DAS/6DAS/8DAS followed by one hand weeding for effecrtive control of weeds OR Pre-emergence application of Pretilachlor + safener at 0.6 l/ha on 4DAS followed by one hand weeding on 40 DAS effectively control weeds. Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Rainfed rice First weeding should be done between 15th and 20th day and second weeding may be done 45 days after first weeding. Or Use Thiobencarb 2.5 l/ha or Pendimethalin 3 l/ha 8 days after sowing if adequate moisture is available, followed by one hand weeding on 30 to 35 days after sowing. Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Direct seeded rice Thiobencarb/Butachlor at 2.5 l/ha as pre-emergence application one day after wetting / soaking can be applied and it should be followed by hand weeding on 30th day. Sufficient soil moisture should be available for herbicidal use Next Previous End

INTEGRATED WEED MANAGEMENT IN RICE Semi dry rice Use Thiobencarb 3 l/ha or Pendimethalin 4 l/ha on 8th day after sowing as sand mix if adequate moisture is available, followed by one hand weeding on 30-35 days after sowing. Or Pre-emergence application of pretilachlor 0.6 l/ha followed by post emergence application of 2,4-D Na salt 1.25 kg/ha + one hand weeding on 45DAS. Previous

Reference Gupta, O.P. 1998. Weed management - Principles and Practices. Agro Botanical Publishers, Bikaner. Rao, V.S.1994. Principles of Weed Science. Oxford and IBH Publishing Co. Pvt. Ltd., New Delhi. Subramanian, S., A.Mohamed Ali and R.Jayakumar. 1997. All about weed control. Kalyani Publishers, New Delhi. C. Chinnusamy, N.K. Prabhakaran P. Janaki K. Govindarajan. 2009. Compendium on Weed Science Research in Tamil Nadu (25 years). AICPR-WC, Department of Agronomy, TNAU, Coimbatore - 641 003 K. A.A. Kabeer and V.J. Nair. 2009. Flora of Tamil Nadu- Grasses. Botanical Survey of India, Kolkatta. Next Previous End

What is the pre emergence herbicide sprayed in the rice nursery Assessment What is the pre emergence herbicide sprayed in the rice nursery a.Thiobencarb b. Atrazine c. Butachlor Herbicide mixed with 100 kg of sand (True/False) – False. Butachlor used as post emergence herbicice (True/False) - False Which chemical used as herbicide for rainfed rice a.Thiobencarb b. Atrazine c. Butachlor. Previous