Field evaluation of Australian commercial wheat genotypes for competitive traits and weed suppression

James M Mwendwa, William Brown, Graeme Heath, Hanwen Wu, Jane Quinn, Jeffrey Weidenhamer, Leslie Weston

Research output: Other contribution to conferenceAbstract

Abstract

In 2014 to 2016, replicated field trials were performed to evaluate mechanisms of weed suppression in diverse Australian wheat genotypes in moderate to low rainfall zones at Wagga Wagga and Condobolin NSW, respectively, in commercially managed paddocks. In 2014, a total of 11 winter wheat cultivars (Triticum aestivum L.) representing four major breeding family lines grown in Australia were evaluated; in 2015 and 2016, 13 cultivars were assessed including the heritage cultivar Federation. At each site, crop and weed growth were monitored at various phenological stages including early season, vegetative, grain-filling, harvest and post-harvest to the crop.
Significant differences between wheat cultivar and location were observed for crop biomass, early vigour, leaf area index (LAI), weed number, weed biomass, canopy architecture and yield in each year the experiment was conducted. Differences in weed suppression were largely impacted by crop architecture and phenology early in the growing season, particularly leaf shape and the ability to achieve early canopy closure. Cultivar competitive traits were also influenced by both genotype and environmental factors, as shown by clear differences in cultivar performance, yield and weed suppression among both locations. Cultivars Condo and Espada were superior performers in terms of weed suppression and yielding potential in both locations and all years.
Our results were replicated over multiple locations and years and clearly suggest that establishment of competitive wheat cultivars can result in effective suppression of weed growth (up to 90% or greater) in the absence of post-emergent herbicides. This suggests that weed suppression may be associated with cultivar competitive ability and/or allelopathy. In addition, the choice of wheat cultivars for desired yield and weed suppression impacts the subsequent ability of the crop to successfully interfere with weed growth and can prevent future weed propagules from entering the weed seedbank. Therefore, the choice of wheat cultivar can provide cost-effective and sustainable weed management and is useful tool, in addition to the use of pre-emergence herbicides.
Original languageEnglish
Publication statusPublished - 2017
Event8th World Congress of Allelopathy: IAS - Villa Mediterranee, Marseille, France
Duration: 24 Jul 201728 Jul 2017
https://wca2017.sciencesconf.org/

Conference

Conference8th World Congress of Allelopathy
Abbreviated titleAlellopathy for sustainable ecosystems
CountryFrance
CityMarseille
Period24/07/1728/07/17
Internet address

Fingerprint

weed control
wheat
genotype
cultivars
weeds
crops
herbicides
canopy
allelopathy
biomass
filling period
leaf area index
vigor
winter wheat
phenology
field experimentation
Triticum aestivum
growing season
pastures
rain

Grant Number

  • GRDC UCS 00020
  • GRDC UCS 00022
  • GRDC UCS 00023

Cite this

Mwendwa, J. M., Brown, W., Heath, G., Wu, H., Quinn, J., Weidenhamer, J., & Weston, L. (2017). Field evaluation of Australian commercial wheat genotypes for competitive traits and weed suppression. Abstract from 8th World Congress of Allelopathy, Marseille, France.
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abstract = "In 2014 to 2016, replicated field trials were performed to evaluate mechanisms of weed suppression in diverse Australian wheat genotypes in moderate to low rainfall zones at Wagga Wagga and Condobolin NSW, respectively, in commercially managed paddocks. In 2014, a total of 11 winter wheat cultivars (Triticum aestivum L.) representing four major breeding family lines grown in Australia were evaluated; in 2015 and 2016, 13 cultivars were assessed including the heritage cultivar Federation. At each site, crop and weed growth were monitored at various phenological stages including early season, vegetative, grain-filling, harvest and post-harvest to the crop.Significant differences between wheat cultivar and location were observed for crop biomass, early vigour, leaf area index (LAI), weed number, weed biomass, canopy architecture and yield in each year the experiment was conducted. Differences in weed suppression were largely impacted by crop architecture and phenology early in the growing season, particularly leaf shape and the ability to achieve early canopy closure. Cultivar competitive traits were also influenced by both genotype and environmental factors, as shown by clear differences in cultivar performance, yield and weed suppression among both locations. Cultivars Condo and Espada were superior performers in terms of weed suppression and yielding potential in both locations and all years. Our results were replicated over multiple locations and years and clearly suggest that establishment of competitive wheat cultivars can result in effective suppression of weed growth (up to 90{\%} or greater) in the absence of post-emergent herbicides. This suggests that weed suppression may be associated with cultivar competitive ability and/or allelopathy. In addition, the choice of wheat cultivars for desired yield and weed suppression impacts the subsequent ability of the crop to successfully interfere with weed growth and can prevent future weed propagules from entering the weed seedbank. Therefore, the choice of wheat cultivar can provide cost-effective and sustainable weed management and is useful tool, in addition to the use of pre-emergence herbicides.",
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Mwendwa, JM, Brown, W, Heath, G, Wu, H, Quinn, J, Weidenhamer, J & Weston, L 2017, 'Field evaluation of Australian commercial wheat genotypes for competitive traits and weed suppression' 8th World Congress of Allelopathy, Marseille, France, 24/07/17 - 28/07/17, .

Field evaluation of Australian commercial wheat genotypes for competitive traits and weed suppression. / Mwendwa, James M; Brown, William; Heath, Graeme; Wu, Hanwen; Quinn, Jane; Weidenhamer, Jeffrey; Weston, Leslie.

2017. Abstract from 8th World Congress of Allelopathy, Marseille, France.

Research output: Other contribution to conferenceAbstract

TY - CONF

T1 - Field evaluation of Australian commercial wheat genotypes for competitive traits and weed suppression

AU - Mwendwa, James M

AU - Brown, William

AU - Heath, Graeme

AU - Wu, Hanwen

AU - Quinn, Jane

AU - Weidenhamer, Jeffrey

AU - Weston, Leslie

PY - 2017

Y1 - 2017

N2 - In 2014 to 2016, replicated field trials were performed to evaluate mechanisms of weed suppression in diverse Australian wheat genotypes in moderate to low rainfall zones at Wagga Wagga and Condobolin NSW, respectively, in commercially managed paddocks. In 2014, a total of 11 winter wheat cultivars (Triticum aestivum L.) representing four major breeding family lines grown in Australia were evaluated; in 2015 and 2016, 13 cultivars were assessed including the heritage cultivar Federation. At each site, crop and weed growth were monitored at various phenological stages including early season, vegetative, grain-filling, harvest and post-harvest to the crop.Significant differences between wheat cultivar and location were observed for crop biomass, early vigour, leaf area index (LAI), weed number, weed biomass, canopy architecture and yield in each year the experiment was conducted. Differences in weed suppression were largely impacted by crop architecture and phenology early in the growing season, particularly leaf shape and the ability to achieve early canopy closure. Cultivar competitive traits were also influenced by both genotype and environmental factors, as shown by clear differences in cultivar performance, yield and weed suppression among both locations. Cultivars Condo and Espada were superior performers in terms of weed suppression and yielding potential in both locations and all years. Our results were replicated over multiple locations and years and clearly suggest that establishment of competitive wheat cultivars can result in effective suppression of weed growth (up to 90% or greater) in the absence of post-emergent herbicides. This suggests that weed suppression may be associated with cultivar competitive ability and/or allelopathy. In addition, the choice of wheat cultivars for desired yield and weed suppression impacts the subsequent ability of the crop to successfully interfere with weed growth and can prevent future weed propagules from entering the weed seedbank. Therefore, the choice of wheat cultivar can provide cost-effective and sustainable weed management and is useful tool, in addition to the use of pre-emergence herbicides.

AB - In 2014 to 2016, replicated field trials were performed to evaluate mechanisms of weed suppression in diverse Australian wheat genotypes in moderate to low rainfall zones at Wagga Wagga and Condobolin NSW, respectively, in commercially managed paddocks. In 2014, a total of 11 winter wheat cultivars (Triticum aestivum L.) representing four major breeding family lines grown in Australia were evaluated; in 2015 and 2016, 13 cultivars were assessed including the heritage cultivar Federation. At each site, crop and weed growth were monitored at various phenological stages including early season, vegetative, grain-filling, harvest and post-harvest to the crop.Significant differences between wheat cultivar and location were observed for crop biomass, early vigour, leaf area index (LAI), weed number, weed biomass, canopy architecture and yield in each year the experiment was conducted. Differences in weed suppression were largely impacted by crop architecture and phenology early in the growing season, particularly leaf shape and the ability to achieve early canopy closure. Cultivar competitive traits were also influenced by both genotype and environmental factors, as shown by clear differences in cultivar performance, yield and weed suppression among both locations. Cultivars Condo and Espada were superior performers in terms of weed suppression and yielding potential in both locations and all years. Our results were replicated over multiple locations and years and clearly suggest that establishment of competitive wheat cultivars can result in effective suppression of weed growth (up to 90% or greater) in the absence of post-emergent herbicides. This suggests that weed suppression may be associated with cultivar competitive ability and/or allelopathy. In addition, the choice of wheat cultivars for desired yield and weed suppression impacts the subsequent ability of the crop to successfully interfere with weed growth and can prevent future weed propagules from entering the weed seedbank. Therefore, the choice of wheat cultivar can provide cost-effective and sustainable weed management and is useful tool, in addition to the use of pre-emergence herbicides.

KW - Weed suppression, canopy architecture, phenology, yield, weed seedbank

UR - https://wca2017.sciencesconf.org/

M3 - Abstract

ER -

Mwendwa JM, Brown W, Heath G, Wu H, Quinn J, Weidenhamer J et al. Field evaluation of Australian commercial wheat genotypes for competitive traits and weed suppression. 2017. Abstract from 8th World Congress of Allelopathy, Marseille, France.