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Control of Elymus repens by rhizome fragmentation and repeated mowing in a newly established white clover sward

Bergkvist, Göran and Ringselle, Björn and Magnuski, Ewa and Mangerud, K. and Brandsæter, L. O. (2017). Control of Elymus repens by rhizome fragmentation and repeated mowing in a newly established white clover sward. Weed research. 57, 172-181
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Official URL: http://dx.doi.org/10.1111/wre.12246

Abstract

Control of perennial weeds, such as Elymus repens, generally requires herbicides or intensive tillage. Alternative methods, such as mowing and competition from subsidiary crops, provide less efficient control. Fragmenting the rhizomes, with minimal soil disturbance and damage to the main crop, could potentially increase the efficacy and consistency of such control methods. This study's aim was to investigate whether fragmenting the rhizomes and mowing enhance the control of E. repens in a white clover sward. Six field experiments were conducted in 2012 and 2013 in Uppsala, Sweden, and As, Norway. The effect of cutting slits in the soil using a flat spade in a 10 x 10 cm or 20 x 20 cm grid and the effect of repeated mowing were investigated. Treatments were performed either during summer in a spring-sown white clover sward (three experiments) or during autumn, post-cereal harvest, in an under-sown white clover sward (three experiments). When performed in autumn, rhizome fragmentation and mowing reduced E. repens shoot biomass, but not rhizome biomass or shoot number. In contrast, when performed in early summer, rhizome fragmentation also reduced the E. repens rhizome biomass by up to 60%, and repeated mowing reduced it by up to 95%. The combination of the two factors appeared to be additive. Seasonal differences in treatment effects may be due to rhizomes having fewer stored resources in spring than in early autumn. We conclude that rhizome fragmentation in a growing white clover sward could reduce the amount of E. repens rhizomes and that repeated mowing is an effective control method, but that great seasonal variation exists.

Authors/Creators:Bergkvist, Göran and Ringselle, Björn and Magnuski, Ewa and Mangerud, K. and Brandsæter, L. O.
Title:Control of Elymus repens by rhizome fragmentation and repeated mowing in a newly established white clover sward
Series/Journal:Weed research (1365-3180)
Year of publishing :2017
Volume:57
Page range:172-181
Number of Pages:10
Publisher:John Wiley & Sons, Ltd.
ISSN:1365-3180
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H60 Weeds and weed control
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:Agropyron repens, Elytrigia repens, Trifolium repens, perennial weed, cutting, defoliation, mechanical weed control, cover crop, integrated weed management
URN:NBN:urn:nbn:se:slu:epsilon-e-4224
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4224
Additional ID:
Type of IDID
Web of Science (WoS)000400976800004
ID Code:14377
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: SLUpub Connector
Deposited On:07 Jun 2017 12:31
Metadata Last Modified:07 Jun 2017 12:31

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