Allelopathic effect of canola on annual ryegrass

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Abstract

Canola is a leading winter grain crop in Australia but declining yields due to the impacts of weeds and resistances to herbicides is a significant issue for Australian cropping systems. Although weed control herbicide options are available for canola, the prospects of herbicide resistance necessitate considering alternative options such as the allelopathic potential of canola for weed suppression. To assess the allelopathic prospects of canola, a laboratory-based root exudates bioassay was conducted using ECAM (Equal-Compartment-Agar Method). The allelopathic effects of different growth duration (0, 3, 5, 7, 9, 11, 13, and 15 days) and density (15, 30, 45, and 60 seeds/beaker) of canola (var. Ag-Spectrum) against annual ryegrass (as a test species) were investigated. During harvest the inhibited root length and diameter of ryegrass was measured. The experiment was designed as a randomised complete block with three replications and conducted under control conditions. Results showed that canola reduced the root length of ryegrass for 3'9days, and at a density of 60 seeds/beaker was most inhibitory, suggesting that root exudates of canola are correlated with seedling density. Although, the root surface area was not influenced by density, it was significantly influenced by growth duration. Root surfacearea of canola was noticeably inhibited during 3'9 days. The effect of retention of canola root exudates prior to ryegrass sowing was also evaluated under the same experimental conditions. Canola was grown for 0, 3, 5, 7, 9, 11, 13 and 15 days with 60 seeds/beakerusing ECAM, then canola seedlings were removed from the beakers before 15 pre-germinated ryegrass seeds were transplanted into each beaker. There was a significance difference between ryegrass grown with or without prior canola. Increasing growth durationof canola increased the inhibition effect up to 9 days butwith growing time beyond this period there was no further noticeable inhibition.
Original languageEnglish
Title of host publicationProceedings of the 18th Australasian Weeds Conference (2012)
Subtitle of host publicationDeveloping Solutions to Evolving Weed Problems
EditorsValerie Eldershaw
Place of PublicationMelbourne
PublisherWeed Society of Victoria
Pages174-177
Number of pages4
ISBN (Electronic)9780646586700
Publication statusPublished - 2012
Event18th Australasian Weeds Conference (2012) - The Sebel and Citigate Albert Park, Melbourne, Australia
Duration: 08 Oct 201211 Oct 2012
http://caws.org.au/awc_contents.php?yr=2012 (Conference proceedings)

Conference

Conference18th Australasian Weeds Conference (2012)
Abbreviated titleDeveloping Solutions to Evolving Weed Problems
CountryAustralia
CityMelbourne
Period08/10/1211/10/12
Internet address

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canola
Lolium
root exudates
herbicide resistance
seeds
weed control
agar
duration
seedlings
grain crops
cropping systems
surface area
sowing
herbicides
bioassays
weeds

Cite this

Asaduzzaman, M., An, M., Pratley, J., Luckett, D., & Lemerle, D. (2012). Allelopathic effect of canola on annual ryegrass. In V. Eldershaw (Ed.), Proceedings of the 18th Australasian Weeds Conference (2012): Developing Solutions to Evolving Weed Problems (pp. 174-177). Melbourne: Weed Society of Victoria.
Asaduzzaman, Md ; An, Min ; Pratley, James ; Luckett, David ; Lemerle, Deirdre. / Allelopathic effect of canola on annual ryegrass. Proceedings of the 18th Australasian Weeds Conference (2012): Developing Solutions to Evolving Weed Problems. editor / Valerie Eldershaw. Melbourne : Weed Society of Victoria, 2012. pp. 174-177
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abstract = "Canola is a leading winter grain crop in Australia but declining yields due to the impacts of weeds and resistances to herbicides is a significant issue for Australian cropping systems. Although weed control herbicide options are available for canola, the prospects of herbicide resistance necessitate considering alternative options such as the allelopathic potential of canola for weed suppression. To assess the allelopathic prospects of canola, a laboratory-based root exudates bioassay was conducted using ECAM (Equal-Compartment-Agar Method). The allelopathic effects of different growth duration (0, 3, 5, 7, 9, 11, 13, and 15 days) and density (15, 30, 45, and 60 seeds/beaker) of canola (var. Ag-Spectrum) against annual ryegrass (as a test species) were investigated. During harvest the inhibited root length and diameter of ryegrass was measured. The experiment was designed as a randomised complete block with three replications and conducted under control conditions. Results showed that canola reduced the root length of ryegrass for 3'9days, and at a density of 60 seeds/beaker was most inhibitory, suggesting that root exudates of canola are correlated with seedling density. Although, the root surface area was not influenced by density, it was significantly influenced by growth duration. Root surfacearea of canola was noticeably inhibited during 3'9 days. The effect of retention of canola root exudates prior to ryegrass sowing was also evaluated under the same experimental conditions. Canola was grown for 0, 3, 5, 7, 9, 11, 13 and 15 days with 60 seeds/beakerusing ECAM, then canola seedlings were removed from the beakers before 15 pre-germinated ryegrass seeds were transplanted into each beaker. There was a significance difference between ryegrass grown with or without prior canola. Increasing growth durationof canola increased the inhibition effect up to 9 days butwith growing time beyond this period there was no further noticeable inhibition.",
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Asaduzzaman, M, An, M, Pratley, J, Luckett, D & Lemerle, D 2012, Allelopathic effect of canola on annual ryegrass. in V Eldershaw (ed.), Proceedings of the 18th Australasian Weeds Conference (2012): Developing Solutions to Evolving Weed Problems. Weed Society of Victoria, Melbourne, pp. 174-177, 18th Australasian Weeds Conference (2012), Melbourne, Australia, 08/10/12.

Allelopathic effect of canola on annual ryegrass. / Asaduzzaman, Md; An, Min; Pratley, James; Luckett, David; Lemerle, Deirdre.

Proceedings of the 18th Australasian Weeds Conference (2012): Developing Solutions to Evolving Weed Problems. ed. / Valerie Eldershaw. Melbourne : Weed Society of Victoria, 2012. p. 174-177.

Research output: Book chapter/Published conference paperConference paper

TY - GEN

T1 - Allelopathic effect of canola on annual ryegrass

AU - Asaduzzaman, Md

AU - An, Min

AU - Pratley, James

AU - Luckett, David

AU - Lemerle, Deirdre

N1 - Imported on 03 May 2017 - DigiTool details were: publisher = Melbourne, Victoria, Australia: Weed Society of Victoria Inc, 2012. editor/s (773b) = Valerie Eldershaw; Event dates (773o) = 8-12 October, 2012; Parent title (773t) = Australasian Weeds Conference (AWC).

PY - 2012

Y1 - 2012

N2 - Canola is a leading winter grain crop in Australia but declining yields due to the impacts of weeds and resistances to herbicides is a significant issue for Australian cropping systems. Although weed control herbicide options are available for canola, the prospects of herbicide resistance necessitate considering alternative options such as the allelopathic potential of canola for weed suppression. To assess the allelopathic prospects of canola, a laboratory-based root exudates bioassay was conducted using ECAM (Equal-Compartment-Agar Method). The allelopathic effects of different growth duration (0, 3, 5, 7, 9, 11, 13, and 15 days) and density (15, 30, 45, and 60 seeds/beaker) of canola (var. Ag-Spectrum) against annual ryegrass (as a test species) were investigated. During harvest the inhibited root length and diameter of ryegrass was measured. The experiment was designed as a randomised complete block with three replications and conducted under control conditions. Results showed that canola reduced the root length of ryegrass for 3'9days, and at a density of 60 seeds/beaker was most inhibitory, suggesting that root exudates of canola are correlated with seedling density. Although, the root surface area was not influenced by density, it was significantly influenced by growth duration. Root surfacearea of canola was noticeably inhibited during 3'9 days. The effect of retention of canola root exudates prior to ryegrass sowing was also evaluated under the same experimental conditions. Canola was grown for 0, 3, 5, 7, 9, 11, 13 and 15 days with 60 seeds/beakerusing ECAM, then canola seedlings were removed from the beakers before 15 pre-germinated ryegrass seeds were transplanted into each beaker. There was a significance difference between ryegrass grown with or without prior canola. Increasing growth durationof canola increased the inhibition effect up to 9 days butwith growing time beyond this period there was no further noticeable inhibition.

AB - Canola is a leading winter grain crop in Australia but declining yields due to the impacts of weeds and resistances to herbicides is a significant issue for Australian cropping systems. Although weed control herbicide options are available for canola, the prospects of herbicide resistance necessitate considering alternative options such as the allelopathic potential of canola for weed suppression. To assess the allelopathic prospects of canola, a laboratory-based root exudates bioassay was conducted using ECAM (Equal-Compartment-Agar Method). The allelopathic effects of different growth duration (0, 3, 5, 7, 9, 11, 13, and 15 days) and density (15, 30, 45, and 60 seeds/beaker) of canola (var. Ag-Spectrum) against annual ryegrass (as a test species) were investigated. During harvest the inhibited root length and diameter of ryegrass was measured. The experiment was designed as a randomised complete block with three replications and conducted under control conditions. Results showed that canola reduced the root length of ryegrass for 3'9days, and at a density of 60 seeds/beaker was most inhibitory, suggesting that root exudates of canola are correlated with seedling density. Although, the root surface area was not influenced by density, it was significantly influenced by growth duration. Root surfacearea of canola was noticeably inhibited during 3'9 days. The effect of retention of canola root exudates prior to ryegrass sowing was also evaluated under the same experimental conditions. Canola was grown for 0, 3, 5, 7, 9, 11, 13 and 15 days with 60 seeds/beakerusing ECAM, then canola seedlings were removed from the beakers before 15 pre-germinated ryegrass seeds were transplanted into each beaker. There was a significance difference between ryegrass grown with or without prior canola. Increasing growth durationof canola increased the inhibition effect up to 9 days butwith growing time beyond this period there was no further noticeable inhibition.

KW - Open access version available

KW - Allelopathy

KW - Annual ryegrass

KW - Canola

KW - Growth duration

KW - Root length

M3 - Conference paper

SP - 174

EP - 177

BT - Proceedings of the 18th Australasian Weeds Conference (2012)

A2 - Eldershaw, Valerie

PB - Weed Society of Victoria

CY - Melbourne

ER -

Asaduzzaman M, An M, Pratley J, Luckett D, Lemerle D. Allelopathic effect of canola on annual ryegrass. In Eldershaw V, editor, Proceedings of the 18th Australasian Weeds Conference (2012): Developing Solutions to Evolving Weed Problems. Melbourne: Weed Society of Victoria. 2012. p. 174-177