Weed management using crop competition in Pakistan: A review

Ali, Hafiz Haider; Peerzada, Arslan Masood; Hanif, Zarka; Hashim, Saima; Chauhan, Bhagirath Singh

doi:10.1016/j.cropro.2016.07.009

Cited by 23 publications

(14 citation statements)

References 27 publications

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“…Such a variability might be attributed to the difference in emergence, tillering potential, plant height, and biomass of the varieties [5,17]. Crops with different growth habits such as different root systems, plant heights, tillering potential, and foliar architecture have different competitive potential against weeds [23,[35][36][37][38]. The late emerging varieties, that is, 'DZ-Cr-358' and 'DZ-01-354', allowed weed growth and were more infested than other varieties.…”

Section: Weed Density Dry Weight and Covermentioning

confidence: 99%

Weed-Competitive Ability of Teff (Eragrostis tef (Zucc.) Trotter) Varieties

et al. 2020

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Teff is a staple and well adapted crop in Ethiopia. Weed competition and control have major effects on yields and economic returns of the crop in the country. Among the weed management methods, development and use of weed competitive teff varieties remain the cheapest and most sustainable weed management option. Ten teff varieties were tested for their weed competitive ability in two locations. Treatments were applied using a split plot design with three blocks at each location for two consecutive seasons. Hand weeding and non-weeded treatments were applied to whole plot treatments with teff varieties assigned as split plots within the whole plot. The main objective was to determine relative competitive ability among teff varieties. Results showed that teff varieties showed significant variation in their weed competitive abilities. The varieties ‘Kora’ and ‘DZ-Cr-387’ significantly reduced weed density, dry weight, and cover more than the other teff varieties. They also had the lowest yield losses with a loss of 6% in biomass yield and 18% in grain yield recorded from ‘Kora’ and a loss of 17% in biomass yield and 21% in grain yield recorded from ‘DZ-Cr-387’. Therefore, they showed the highest weed competitive ability compared to the other varieties.

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Section: Weed Density Dry Weight and Covermentioning

confidence: 99%

Weed-Competitive Ability of Teff (Eragrostis tef (Zucc.) Trotter) Varieties

et al. 2020

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“…Weeds compete with crops for resources such as light, nutrients, space, and water, causing plant yields to suffer [ 2 ]. The presence of weeds is very common in crop plant fields, decreasing crop yields and increasing production costs, and consequently making crop production less cost-efficient [ 3 ]. Weeds cause a reduction of crop yields because of disturbances of plant growth due to allelopathy, competition, or both [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Unraveling Sorghum Allelopathy in Agriculture: Concepts and Implications

Hussain

Danish

Sánchez‐Moreiras

et al. 2021

Plants

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Allelopathy is an ecological phenomenon that involves the production and release of biomolecules from different crops, cultivated plants, and bacteria or fungi into the soil rhizosphere and impacts other organisms in the vicinity. Sorghum possesses vital allelopathic characteristics due to which it produces and releases different biomolecules from its root hairs, stems, and grains. Several studies have reported that sorghum acts as an allelopathic crop, decreasing the growth and eco-physiological attributes of surrounding plants and weeds growing simultaneously or subsequently in the field. Sorghum allelopathy has been exploited in the context of green manure, crop rotations, cover crops, and intercropping or mulching, whereas plant aqueous extracts or powder might be an alternate method of weed control. A diverse group of allelochemicals, including benzoic acid, p-hydroxybenzoic acid, vanillic acid, ferulic acid, chlorogenic acid, m-coumaric acid, p-coumaric acid, gallic acid, caffeic acid, p-hydroxibenzaldehyde, dhurrin, sorgoleone, m-hydroxybenzoic acid and protocatechuic acid, have been isolated and identified from different plant tissues of sorghum and root exudates. These allelochemicals, especially sorgoleone, have been investigated in terms of their mode(s) of action, specific activity and selectivity, release in the rhizosphere and uptake and translocation in sensitive species. The present review describes the importance of sorghum allelopathy as an ecological tool in managing weeds, highlighting the most recent advances in the allelochemicals present in sorghum, their modes of action, and their fate in the ecosystem. Further research should focus on the evaluation and selection of sorghum cultivars with high allelopathic potential, so that sorghum allelopathy can be better utilized for weed control and yield enhancement.

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“…However, the adoption of more-competitive varieties together with other cropping practices, including planting density and weeding, can provide greater weed control, in addition to affording the farmer more time to carry out this control. This has been verified for several crops in various countries (ALI et al, 2017;BAJWA;WALSH;CHAUAN, 2017;DASS et al, 2017;JHA et al, 2017).…”

Section: Introductionmentioning

confidence: 60%

Identification of superior cowpea varieties in competition with weeds

Medeiros¹,

Silva²,

Alves³

et al. 2021

Revista Ciência Agronômica

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Cowpea varieties that are more competitive against weeds are, by themselves, not enough to control the weeds. However, the adoption of more-competitive varieties, together with other cropping practices, including planting density and weeding, can provide greater weed control in addition to affording the farmer more time to carry out this control. This study had the following objectives: a) to identify, in a preliminary evaluation (E-1), varieties that are the most competitive against weeds, based on dry grain yield; b) among the most-competitive varieties, identify the most productive in terms of green and dry grain yield (E-2). The seeds used for E-1 were obtained from producers chosen at random from each of 48 districts in the State of Rio Grande do Norte. A randomized block design with five replications was used. In E-2, the twelve varieties presenting the highest grain yield in E-1 were evaluated in a randomized block design with five replications. In both evaluations, only one weeding was carried out, 30 days after sowing. In E-1, the Umarizal, Itaú, Upanema, Lagoa de Pedras, José da Penha and São Tomé varieties were superior. The second experiment demonstrated that Umarizal is the most productive variety in terms of pod yield and green grain. There is no difference between the varieties for dry grain yield. The Umarizal variety has potential for use in the production of green pods and grains, and of dry grains. The preliminary evaluation is effective in identifying superior varieties.

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Weed management using crop competition in Pakistan: A review

Cited by 23 publications

References 27 publications

Weed-Competitive Ability of Teff (Eragrostis tef (Zucc.) Trotter) Varieties

Weed-Competitive Ability of Teff (Eragrostis tef (Zucc.) Trotter) Varieties

Unraveling Sorghum Allelopathy in Agriculture: Concepts and Implications

Identification of superior cowpea varieties in competition with weeds

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