(THE GIST OF PIB) Direct Seeded Rice
(THE GIST OF PIB) Direct Seeded Rice
(JUNE-2024)
Direct Seeded Rice
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Recently, ICAR has commercialised herbicide-tolerant (Ht) basmati rice varieties that can control weeds.
About Direct Seeded Rice (DSR):
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It is a modern rice cultivation technique where rice seeds are directly sown into the field, replacing the traditional method of transplanting seedlings from a nursery.
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It is an efficient, and sustainable method of rice cultivation that offers significant benefits for farmers, the environment, and the economy.
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About Herbicide-Tolerant Basmati Rice: ICAR commercialised non-genetically modified (non-GM) Ht basmati rice. These varieties allow direct application of the herbicide Imazethapyr due to a mutated ALS gene.
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Scientific debate: Research indicates that hand weeding at specific intervals (20 and 40 days after sowing) in DSR is more effective and yield-enhancing than the use of Imazethapyr.
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ICAR’s research favours eco-friendly hand weeding over repeated herbicide applications for weed control and higher seed yield.
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Weed diversity and risks: Imazethapyr targets specific broadleaf weeds (BLW), not all weed types.
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Herbicide-resistant weeds may evolve, threatening rice production and food security.
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Similar challenges were seen with Bt-Cotton and pink bollworm resistance.
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Historical context: In the North Western Plains (e.g., Punjab, Haryana), DSR has been long used for growing Basmati rice.
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Green Revolution promoted water-intensive transplanted rice, causing ecological issues.
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Innovations in DSR: From 2014 to 2017, innovations in DSR at IARI Karnal led to the adoption of TAR-VATTAR technology, which uses climatic factors and effective herbicides like Pendimethalin to reduce costs and save water.
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Courtesy: PIB