Application of sorghum, sunflower and rice water extract combinations helps in reducing herbicide dose for weed management in rice
2010
Rehman, A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Cheema, Z.A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Khaliq, A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Arshad, M. (University of Agriculture, Faisalabad (Pakistan). Inst. of Soil and Environment Sciences) | Mohsan, S. (Government of Pakistan, Islamabad (Pakistan). National Fertilizer Development Centre)
Weeds pose a major threat to good harvests in transplanted rice. Conventionally weeds are controlled by herbicides, but this practice is costly and having generated environmental concerns demands to look for alternative methods that at least reduce herbicide usage without compromising yields. Allelopathic crop water mixtures in combination with reduced doses of three herbicides have been evaluated in 3-year field study carried out at Agronomic Research Area, University of Agriculture, Faisalabad, Pakistan. Mixture of allelopathic crops water extracts of sorghum, sunflower and rice each at 15 L per ha was tank mixed with reduced rates (1/2 & 1/3 of recommended rate) of three pre-emergence herbicides viz. butachlor, pretilachlor and ethoxysulfuronethyl for this purpose. Results revealed that combined application of mixture of allelopathic water extracts with 1/2 of the recommended dose of pre-emergence herbicides butachlor (600 g a.i. per ha), pretilachlor (313 g a.i. per
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