Vol. 8, Issue 4 (2020)
Weed management in direct seeded rice: A review
Author(s): S Rathika, T Ramesh and P Shanmugapriya
Abstract: Direct seeding is done by sowing of pre-germinated rice seeds under puddled condition either manually or by drum seeding methods. Direct seeded rice (DSR) cultivation needs only 34 per cent of the total labour requirement and saves 29 per cent of the total cost of the transplanted rice. Weed infestation and competition are severe in direct wet seeded rice as compared to transplanted rice, because of the simultaneous growth of both crops and weeds. Uncontrolled weeds decreased the yield by 96 per cent in dry DSR and 61 per cent in wet DSR. The yield loss due to weeds varies from 40 to 100 per cent in direct seeded rice. Any delay in weeding will lead to increased weed biomass which has a negative correlation with yield. Though manual weeding is considered to be the best, undependable labour availability and escalating labour cost in many cases have given impetus to the development and use of new chemicals for weed control. In contrast to this, chemical weed control offers economic and efficient weed control if applied at proper dose and stage. The combination of chemical, manual and mechanical weed control is an efficient integrated weed management strategy for effective weed control in direct seeded rice.
DOI: 10.22271/chemi.2020.v8.i4f.9723
Pages: 925-933 | 1026 Views 408 Downloads
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How to cite this article:
S Rathika, T Ramesh, P Shanmugapriya. Weed management in direct seeded rice: A review. Int J Chem Stud 2020;8(4):925-933. DOI: 10.22271/chemi.2020.v8.i4f.9723
