ORCID Profile
0000-0001-7984-9370
Current Organisation
University of Agriculture Faisalabad
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Publisher: FapUNIFESP (SciELO)
Date: 07-12-2017
DOI: 10.1590/S0100-83582017350100073
Abstract: ABSTRACT: Understanding the weed interference with different sowing times of crop is inevitable for forecasting yield losses by weed infestation and designing sustainable weed management systems. A field experiment was carried out to evaluate the effects of sowing dates (20th November, 10th December) and various little seed canary grass (LCG) infestation levels (10, 20, 30 and 40 plant m-2) on growth and yield of wheat under semiarid conditions. Plots with two natural infestations of weeds including LCG (Unweeded control UWC) and excluding LCG (UWC-LCG) were maintained for comparing its interference in pure stands with designated densities. A season-long weed-free (WFC) treatment was also run. All the weeds/LCG infestation levels starting from 10 LCG plants m-2 considerably reduced the wheat growth (leaf area index, crop growth rate, total dry matter accumulation) and h ered the yield contributing factors in both sowing dates. Presence of LCG was more detrimental for growth of late-sown wheat (10th Dec), therefore, 40 LCG plants m-2 recorded more reductions in growth indices of wheat even than UWC. In late sown wheat crop, the grain yield losses by 40 LCG plants m-2 and UWC were comparable, however, these losses were much greater than UWC LCG. In crux, delay in sowing of wheat not only reduced the crop growth and yield but also enhanced the LCG/weed interference. Furthermore, greater competitive ability of LCG particularly for late-sown wheat suggests that it should be controlled in order to provide healthy environment for crop plants.
Publisher: Elsevier
Date: 2015
Publisher: Informa UK Limited
Date: 03-2011
Publisher: FapUNIFESP (SciELO)
Date: 03-2016
DOI: 10.1590/S0100-83582016340100011
Abstract: To assess the phytotoxic potential of Achyranthes aspera, Alternanthera philoxeroides, Datura metel and Rumex dentatus against Parthenium hysterophorus, 5% (w/v on dry weight basis) aqueous extracts from root, stem, leaf, flower and whole plant were tested through a Petri plate-based germination and pot-cultured seedling bioassays. Achyranthes aspera and A. philoxeroides inhibited parthenium weed germination more than extracts from other species. Whole plant, leaf and fruit extracts of A. aspera reduced the germination percentage (5%) leaf extract from A. philoxeroides caused lower germination index (0.4), higher mean germination time (14 d) and longer time to 50% germination (13.5 d) of parthenium weed. In the foliar spray bioassay, A. aspera reduced parthenium weed shoot growth more than the other species whereas R. dentatus caused more reduction in root growth. Whole plant extract from A. aspera caused maximum reduction in parthenium weed seedling vigor index (98%) and seedling biomass (96%). The aqueous extracts of A. aspera and A. philoxeroides contained higher concentrations of phenolics viz. gallic (16.9 mg L-1), caffeic (7.4 mg L-1), chromatotropic (63.8 mg L-1), p-coumaric (10.5 mg L-1), m-coumaric (3.1 mg L-1), syringic (9.21 mg L-1) and 4 hydroxy-3-methoxy benzoic (118.6 mg L-1) acids compared with extracts of the other two species tested.
Publisher: Elsevier BV
Date: 07-2016
Publisher: Springer Science and Business Media LLC
Date: 15-03-2018
Publisher: FapUNIFESP (SciELO)
Date: 2018
DOI: 10.1590/S0100-83582018360100144
Abstract: ABSTRACT: Weed infestation is among the main factors which decrease cotton yield. Allelopathy has been well-documented as a phenomenon offering natural weed control in agro-ecosystems. An experiment was conducted to figure out the herbicidal potential of a mixture of sorghum and brassica water extracts (SBWE) against weeds in cotton. Combinations of SBWE each at 16 L ha-1 were sprayed alone and in combination in a tank mixed with and ¼ doses of both pendimethalin (0.625 and 0.416 kg a.i. ha-1) and S-metolachlor (1.075 and 0.716 kg a.i. ha-1). Recommended doses of pendimethalin (1.25 kg a.i. ha-1) and S-metolachlor (2.15 kg a.i. ha-1) were also sprayed for comparison. As control, a weedy check treatment where nothing was sprayed was also included in the experiment. Lower doses () of both herbicides in combination with SBWE gave approximately the same level of weed reduction and crop improvement as given by the recommended doses of herbicides. Furthermore, economic and marginal analysis showed that maximum net benefits were obtained in using allelopathic water extracts alone and in combination with lower rates of commercial herbicides. Thus, in conclusion, allelopathy can be employed for weed management and yield maximization in modern agriculture.
Publisher: Elsevier BV
Date: 05-2015
Publisher: Elsevier BV
Date: 03-2020
Publisher: Informa UK Limited
Date: 30-05-2020
Publisher: Informa UK Limited
Date: 12-06-2017
Publisher: Springer Science and Business Media LLC
Date: 24-12-2014
Publisher: Informa UK Limited
Date: 2014
DOI: 10.1626/PPS.17.321
No related grants have been discovered for Abdul Khaliq.