Weed control efficiency and weed index as influenced by weed management practices in machine transplanted rice (Oryza sativa L.)
Journal Title: Journal of Applied and Natural Science - Year 2016, Vol 8, Issue 4
Abstract
Field experiment on effect of different weed management practices in machine transplanted rice (Oryza sativa L.) was conducted at ARS, Gangavathi, University of Agricultural Sciences, Raichur, Karnataka during kharif, 2012 and 2013 under irrigated condition in clay soil. Pooled mean indicated that, application of butachlor 50 EC fb passing of power operated low land rice weeder twice at 20 and 30 DAT with hand weeding in intra row space recorded significantly lower grassy weed population and dry weight at 40, 60 DAT and at harvest (1.98, 2.47, 2.97/0.25 m2 and 1.00, 1.20, 1.47 g /0.25 m2, respectively), sedge weed population and dry weight (2.61, 3.21, 3.52 /0.25 m2 and 1.19, 1.48, 1.71 g /0.25 m2, respectively) and broad leaved weed population and dry weight (1.68, 2.10, 2.52 / 0.25 m2 and 0.91, 1.06, 1.28 g /0.25 m2, respectively). Significantly higher WCE (87.53%), lower weed index (3.11 %), grain and straw yield (5160 and 6482 kg ha-1, respectively), gross and net returns (Rs. 92,212 and 50,410 ha-1, respectively), and B:C of 2.22 over unweeded check. Hence, application of butachlor 50 EC fb passing of power operated low land rice weeder at 20 and 30 DAT with hand weeding in intra row space was found to be the best weed control method as it recorded higher B:C. Present conventional manual weeding is which is not advantageous as it is costlier, time consuming and labour may trample and damage rice seedlings. Mechanical weeder and sequential application can overcome the same.
Authors and Affiliations
R. B. Negalur, A. S. Halepyati
Keywords
Related Articles
- EP ID EP285608
- DOI -
- Views 106
- Downloads 0
Composition, richness and floristic diversity along an elevational gradient in a semi-disturbed treeline ecotone, Bhaderwah, Jammu and Kashmir
The paper deals with plant species richness - diversity relationship along the rising elevation in a semi-disturbed tree line ecotone in upper Bhaderwah, a part of lesser Himalaya. 253 plant species distributed over 170...
Effect of plant spacing and fertility level on leaf area variation at different phenological stages of cape gooseberry (Physalisperuviana L.) grown in sodic soil
Vegetative and reproductive growth in cape gooseberry (Physalisperuviana L.) proceed concomitantly during the greater part of the life cycle thereby foliar traits (e.g. leaf area) become important in photosynthetic actio...
Effect of biofertilizers on horticultural and yield traits in french bean var. Contender under dry temperate conditions of Kinnaur district of Himachal Pradesh
Kinnaur district is known as the dry temperate zone of Himachal Pradesh and is known for off season and quality production of vegetables.In this district of Himachal Pradesh, Natural farming is mostly done with the minim...
In vitro mass multiplication of Jatropha (Jatropha curcas L.) through axillary bud culture
The present investigation was conducted for mass multiplication of Jatropha curcas L. through axillary bud culture. For this nodal segment from 3-5 months old nursery grown plants were used as explants for axillary bud c...
Foraging behavior of major insect pollinators on pumpkin, Cucurbita moschata (Duch.ex Lam)
Foraging activity period of different honey bee species on C. moschata (C-1076) flowers at different day hours during August-September (2013) revealed that A. dorsata, A. mellifera, A. cerana and A. florea initiated thei...