Growth and Yield Losses in Wheat Due to Different Weed Densities

., F.C. Oad; Siddiqui, M. H.; ., U.A. Buriro

doi:10.3923/ajps.2007.173.176

Cited by 29 publications

(14 citation statements)

References 6 publications

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“…In addition, Phalaris spp. are highly competitive plants with high seed production [ 6 , 7 , 8 ]; therefore, managing these grasses is essential to avoid compromising crop yields.…”

Section: Introductionmentioning

confidence: 99%

Point Mutations and Cytochrome P450 Can Contribute to Resistance to ACCase-Inhibiting Herbicides in Three Phalaris Species

Vázquez-García

Torra

Palma-Bautista

et al. 2021

Plants

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Species of Phalaris have historically been controlled by acetyl-coenzyme A carboxylase (ACCase)-inhibiting herbicides; however, overreliance on herbicides with this mechanism of action has resulted in the selection of resistant biotypes. The resistance to ACCase-inhibiting herbicides was characterized in Phalaris brachystachys, Phalaris minor, and Phalaris paradoxa samples collected from winter wheat fields in northern Iran. Three resistant (R) biotypes, one of each Phalaris species, presented high cross-resistance levels to diclofop-methyl, cycloxydim, and pinoxaden, which belong to the chemical families of aryloxyphenoxypropionates (FOPs), cyclohexanediones (DIMs), and phenylpyrazolines (DENs), respectively. The metabolism of 14C-diclofop-methyl contributed to the resistance of the P. brachystachys R biotype, while no evidence of herbicide metabolism was found in P. minor or P. paradoxa. ACCase in vitro assays showed that the target sites were very sensitive to FOP, DIM, and DEN herbicides in the S biotypes of the three species, while the R Phalaris spp. biotypes presented different levels of resistance to these herbicides. ACCase gene sequencing confirmed that cross-resistance in Phalaris species was conferred by specific point mutations. Resistance in the P. brachystachys R biotype was due to target site and non-target-site resistance mechanisms, while in P. minor and P. paradoxa, only an altered target site was found.

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“…In addition, Phalaris spp. are highly competitive plants with high seed production [ 6 , 7 , 8 ]; therefore, managing these grasses is essential to avoid compromising crop yields.…”

Section: Introductionmentioning

confidence: 99%

Point Mutations and Cytochrome P450 Can Contribute to Resistance to ACCase-Inhibiting Herbicides in Three Phalaris Species

Vázquez-García

Torra

Palma-Bautista

et al. 2021

Plants

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“…Weed control, particularly during the initial stages of crop establishment is very essential in realizing higher yield. Oad et al 2007 [12] reported that there are about 24 -39.95 per cent economic yield losses of crop due to weed while Patro and Ray (2016) [13] reported that uncontrolled weed growth throughout the crop growing period may cause a yield reduction of 29.12 to 62.14 percent. Further, use of single herbicide may not provide an effective control due to wide diversity of weed flora observed in the field.…”

Section: Introductionmentioning

confidence: 99%

Available nutrients in soil are influenced by planting techniques and weed management options in wheat

Yadav¹,

Verma²,

Pratap³

et al. 2020

Int. J. Chem. Stud.

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There are continue disturbance of soil under conventional wheat system as repetitive tillage practices for crop establishment results negative impact like; more weed emergence, depletion of soil nutrients and economical losses; laborious and hazardous to environment by affecting sustainability of system and creating pollution. Zero tillage practices are avoiding soil disturbance for seedbed preparation; enhance the sustainability by conserving the resources. Residue retention or application as mulching act as soil condition modifier, reducing the weed population by soil covering and after decomposition release of organic acid in soil help increase the availability of nutrient. Such practices are kept in field experiment to evaluate the zero tillage wheat with variable rate of residue application as mulch in zero tillage and weed management practices. Result revealed that zero-till wheat with 6 ton ha -1 rice residue as mulch application having higher available N, P, K, OC, SMBC with slightly lower pH and EC; while weed management practices shown Sulfosulfuron + metsulfuron @ 25+2 g a.i. ha -1 higher availability of N, P, K, OC, SMBC with slightly lower pH and EC in experimental trial.

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“…infestation in winter wheat reduced grain yield by 3 t ha −1 in Germany [15]. The yield losses due to weed infestations in wheat crop may reach up to 50% in Pakistan [16]. Therefore, sustainable weed management strategy will be a key factor in increasing wheat yield [13,17].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Different Crop Rotations by Weed Management Strategies’ Interactions on Weed Infestation and Productivity of Wheat (Triticum aestivum L.)

et al. 2021

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Weed infestations significantly reduce the growth and yield of field crops. Herbicides are mostly used for weed management due to their quick results. However, resistant biotypes to available herbicides are rapidly increasing around the word. This situation calls for the development of alternative weed management strategies. Crop rotation and allelopathic water extracts are regarded as the most important alternative weed management strategies. Therefore, this two-year study assessed the impact of different annual crop rotations by weed management strategies’ interactions on weed infestation and productivity of wheat crop. Wheat was planted in five rotations, i.e., (i) fallow-wheat, (ii) rice-wheat, (iii) cotton-wheat, (iv) mungbean-wheat and (v) sorghum-wheat. The weed management strategies included in the study were; (i) false seedbed, (ii) application of 12 L ha−1 allelopathic plant water extracts (1:1:1:1 ratio of sorghum, sunflower, mulberry and eucalyptus), (iii) herbicide application, (iv) weed-free (weed control) and (v) weedy-check (no weed control). Herbicide application was the most effective treatment in lowering weed densities and biomass during both years followed by false seedbed, while allelopathic crop water extracts were least effective. The lowest weed infestation was noted in sorghum-wheat rotation followed by cotton-wheat and mungbean-wheat, while fallow-wheat had the highest weed infestation. Weedy-check treatment caused significant reduction in wheat growth and yield, whereas the highest grain yield was recorded from weed-free and herbicide application treatments. Grain yield of wheat planted after sorghum was suppressed; however, yield improved when wheat was planted after mungbean. Planting wheat after mungbean in a weed-free environment, achieved through chemical and/or mechanical means, is the best strategy to obtain higher wheat yields.

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Growth and Yield Losses in Wheat Due to Different Weed Densities

Cited by 29 publications

References 6 publications

Point Mutations and Cytochrome P450 Can Contribute to Resistance to ACCase-Inhibiting Herbicides in Three Phalaris Species

Point Mutations and Cytochrome P450 Can Contribute to Resistance to ACCase-Inhibiting Herbicides in Three Phalaris Species

Available nutrients in soil are influenced by planting techniques and weed management options in wheat

The Impact of Different Crop Rotations by Weed Management Strategies’ Interactions on Weed Infestation and Productivity of Wheat (Triticum aestivum L.)

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