Interference between red kidneybean (Phaseolus vulgaris L.) cultivars and redroot pigweed (Amaranthus retroflexus L.)

Rouhollah, Amini; Mohammad-Alizadeh, H.; Yousefi, A

doi:10.1016/j.eja.2014.07.002

Cited by 34 publications

(27 citation statements)

References 36 publications

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“…These studies will provide critical information for timely management of goosegrass. In addition, it is necessary to address effects on leaf area index, photosynthetically active radiation, and growth rate, which are the better growth indices involved in competitiveness of crop against weed (Amini et al 2014;Ghanizadeh et al 2014).…”

Section: Resultsmentioning

confidence: 99%

Goosegrass (Eleusine indica) density effects on cotton (Gossypium hirsutum)

Jiang

et al. 2015

Journal of Integrative Agriculture

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Goosegrass is one of the worst agricultural weeds on a worldwide basis. Understanding of its interference impact in crop field will provide useful information for weed control programs. Field experiments were conducted during 2010-2012 to determine the influence of goosegrass density on cotton growth at the weed densities of 0, 0.125, 0.25, 0.5, 1, 2, and 4 plants m-1 of row. Seed cotton yield tended to decrease with the increase in weed density, and goosegrass at a density of 4 plants m-1 of row significantly reduced cotton yields by 20 to 27%. A density of 11.6-19.2 goosegrass plant m-1 of row would result in a 50% cotton yield loss from the maximum yield according to the hyperbolic decay regression model. Boll production was not affected in the early growing season. But boll numbers per plant was reduced about 25% at the density of 4 plants m-1 of row in the late growing season. Both cotton boll weight and seed numbers per boll were significantly reduced (8%) at 4 goosegrass plants m-1 of row. Cotton plant height, stem diameter and sympodial branch number were not affected as much as cotton yields by goosegrass competition. Seed index, lint percentage and lint fiber properties were unaffected by weed competition. Intraspecific competition resulted in density-dependent effects on weed biomass per plant, 142-387 g dry weight by harvest. Goosegrass biomass m-2 tended to increase with increasing weed density as indicated by a quadratic response. The adverse impact of goosegrass on cotton yield identified in this study has indicated the need of effective goosegrass management.

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Section: Resultsmentioning

confidence: 99%

Goosegrass (Eleusine indica) density effects on cotton (Gossypium hirsutum)

Jiang

et al. 2015

Journal of Integrative Agriculture

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“…Increasing the vetch in the cover mix increased nitrogen accumulation and improved weed suppression, but the mechanism for the successful result was not clear. Amini et al (2014) provided a generalizable result drawing on competitive indices like crop leaf area index (LAI) (Zhao et al 2006;Hansen et al 2008) and growth rate to rank different crop varieties competitive potential with a single weed species (Steinmaus and Norris 2002;Kropff and Lotz 1992). If multiple weeds occur in the system the interactions become experimentally intractable.…”

Section: Direct Competition For Resourcesmentioning

confidence: 99%

Weed-plant interactions

Maxwell¹

2017

Burleigh Dodds Series in Agricultural Science

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Crops or desired plant species co-occur with undesired species, and the co-occurring species thereby come to be classed as weeds. This human-imposed classification is based on the perception that there is an interaction that results in some negative effect of the weed on the crop or desired species. This chapter offers an evolutionary perspective on crop–weed interactions and examines the nature of shared resource pools between desired crops and weeds. The chapter addresses the effects of direct competition between weeds and crops for resources, the indirect effects of competition and the spatial and temporal dynamics of crop–weed interaction.

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“…Redroot pigweed, one of the most invasive weeds in agricultural production worldwide [2], is known to reduce yields in bean species (Phaseolus spp.) [3] [4] [5], soybean (Glycine max L.) [6], corn (Zea mays L.) [7] [8] [9], and cotton [10] [11] [12]. It is a nuisance because one plant produces thousands of seeds, ensuring the next generation of plants [13].…”

Section: Introductionmentioning

confidence: 99%

Canopy Hyperspectral Reflectance of Redroot Pigweed versus Okra and Super Okra Leaf Cotton

Fletcher¹

2019

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Redroot pigweed (Amaranthus retroflexus L.) is a nuisance weed that affects cotton (Gossypium hirsutum L.) growth and yield worldwide. Being able to distinguish redroot pigweed from cotton would help producers and crop consultants better implement strategies used to suppress and control it. Hyperspectral reflectance properties of weed and crop canopies have been used to differentiate between them. Currently, no information is available on the application of hyperspectral data to distinguish redroot pigweed from cotton with different leaf shapes. Positive results will further support the exploration of remote sensing technology for distinguishing redroot pigweed from cotton. The objectives were to compare canopy hyperspectral reflectance of redroot pigweed to canopy hyperspectral reflectance of okra and super okra leaf cotton and to identify regions of the spectrum in which differences exist in their reflectance properties. Hyperspectral reflectance measurements of redroot pigweed and cotton were obtained with a spectroradimeter on May 6 and June 27, 2019. Plants grown in a greenhouse were used for this study. One-hundred and sixty-two 10-nm bands (400-2350 nm spectral range) were evaluated with analysis of variance (p ≤ 0.05) and Dunnett's test (p ≤ 0.05) to determine the wavebands that were useful for separating redroot pigweed from okra leaf and super okra leaf cotton. The following bands were consistent in distinguishing redroot pigweed and okra leaf cotton on both dates: 420 nm, 510-650 nm, 690-740 nm, and 2000-2010 nm; whereas, 400-500 nm, 1480-1780 nm, and 1990-2350 nm were identified for both dates for separating redroot pigweed from super okra leaf cotton. Commercial imaging systems used on ground-based or airborne platforms can be easily tuned into the spectral bands listed in this study, thus providing managers with a tool to use for identifying redroot pigweed in cotton production systems.

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Interference between red kidneybean (Phaseolus vulgaris L.) cultivars and redroot pigweed (Amaranthus retroflexus L.)

Cited by 34 publications

References 36 publications

Goosegrass (Eleusine indica) density effects on cotton (Gossypium hirsutum)

Goosegrass (Eleusine indica) density effects on cotton (Gossypium hirsutum)

Weed-plant interactions

Canopy Hyperspectral Reflectance of Redroot Pigweed versus Okra and Super Okra Leaf Cotton

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