Losses in Crop Yield in India Due to Weed Growth

Mani, Veena; Gautam, Kamini; Chakraborty, T.

doi:10.1080/05331856809432575

Cited by 28 publications

(21 citation statements)

References 1 publication

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“…Data were recorded on the degree of weed density (by quantity method -number per m 2 ), herbicidal efficacy, and selectivity (by EWRS scale), and dry matter yield (kg*ha -1 ). Weed control efficacy was estimated in spring before the first cut by the weed plants counting, and herbicide efficacy was calculated by equitation (Mani et al, 1968):…”

Section: Methodsmentioning

confidence: 99%

Weed control in dormant alfalfa (Medicago sativa L.) with active ingredients� metribuzin, imazetapyr and pronamide

Pacanoski¹,

Týr²,

Vereš³

2017

JCEA

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Efficacy of herbicides in control of prevailing weeds during the 3 years field trial period was ranged of 48.5% to 100.0%. No visual alfalfa injured was determined by any rates during the experimental period, and consequently, none of the applied herbicides reduced first-harvest alfalfa yields. Alfalfa yield was markedly affected by herbicide efficacy in all experimental years, particularly in the second year, where yields of herbicide treatments were similar to that of the weed free control.

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Section: Methodsmentioning

confidence: 99%

Weed control in dormant alfalfa (Medicago sativa L.) with active ingredients� metribuzin, imazetapyr and pronamide

Pacanoski¹,

Týr²,

Vereš³

2017

JCEA

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“…Further to restrict the loss in paddy biomass it is necessary to reduce their soil seed bank and reduce their population in the coming year by poor farmers. The reduction in paddy yield due to weed composition ranges from 9-51% (Mani et al 1968). Grain yield was drastically reduced if paddy is not weeded out during early growth stages.…”

Section: Introductionmentioning

confidence: 99%

Floristic Composition of Weeds in Paddy Fields in Mahendranagar, Nepal

Bhatt¹,

Tewari²,

Singh³

1970

Ecoprint

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Field experiments were conducted during 2004 and 2005 in paddy fields to evaluate the floristic composition of weeds, in lowland and upland areas of Mahendranagar, Nepal. A total of 61 weed species belonging to 42 genera and 23 families were recorded. Of the 23 families, Cyperaceae was the largest (13 spp.), followed by Poaceae (11 spp.), Euphorbiaceae (4 spp.), Amaranthaceae, Commelinaceae and Asteraceae (3 spp. each), Polygonaceae (2 spp.) and one species each belonged to Apiaceae, Acanthaceae, Alismataceae, Pontederiaceae, Leguminosae, Convolvulaceae, Eriocaulaceae, Marsileaceae, Malvaceae, Oxalidaceae, Onagraceae, Parkeriaceae, Portulaceae, Rubiaceae and Verbenaceae. The number of weed species was higher in upland (55) when compared with the lowland sites (48). On the basis of Importance Value Index (IVI) dominating weed species in paddy fields were: Fimbristylis miliacea (13.4), Lindernia oppositifolia (13.2), Eleocharis atropurpurea (13.1), Ageratum conyzoides (13.0), Cyperus iria (13.0), Echinochloa crus-galli (11.9), Ischaemum rugosum (11.7), Echinochloa colona (11.4), Cyperus difformis (11.1) and Schoenoplectus juncoides (11.0). Besides dicots and monocots, two species of pteridophytes (Ceratopteris thalictriodes and Marsilea minuta) were also recorded in lowland paddy fields.

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“…Linseed having less branching habit, small leaf area and show growth during initial growth period, it complete poorly with weeds and often suffers from severe weed competition. Unchecked weed growth has been reported to reduce grain yield of linseed to the tune of 34.2 per cent (Mani et al, 1968).…”

Section: Introductionmentioning

confidence: 99%