Effect of annually repeated weed harrowing against Chenopodium album (L.) in organically grown spring cereals

Authors

  • Jukka Salonen Natural Resources Institute Finland (Luke)
  • Mari Niemi Natural Resources Institute Finland (Luke)
  • Minna Haavisto University of Helsinki
  • Eeva-Liisa Juvonen Häme University of Applied Sciences (HAMK), Finland

DOI:

https://doi.org/10.23986/afsci.115327

Keywords:

CHEAL , mechanical weed control , organic farming , spring barley, spring wheat

Abstract

Spring-tine harrowing is a common physical weed control practice employed in organic cereal cropping. The effects
of harrowing treatments on weeds and crop yield were studied in a field experiment of organically grown spring
cereals during 2018–2020. The objective was to demonstrate the feasibility of weed harrowing to enhance overall
weed management in organic cropping in Finland. Single post-emergence weed harrowing, with or without cover
crop drilling, at the 2–4 crop leaf stage was compared with a combined pre- and post-emergence weed harrowing.
Treatments were repeated in the same plots for three years and weed occurrence was assessed prior to harrowing,
two weeks later and at harvest time. Chenopodium album was the predominant weed species in all years.
Although harrowing effectively reduced the weed abundance, which was best with the double treatment, the yield
response in terms of quantity and quality was negligible. Even so, weed harrowing in cereal years is recommended
to suppress weed proliferation in crop rotation.

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Published

2022-05-19 — Updated on 2022-07-07

Versions

Issue

Vol. 31 No. 2 (2022)

Section

Articles

License

Copyright (c) 2022 Jukka Salonen, Mari Niemi, Minna Haavisto, Eeva-Liisa Juvonen

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How to Cite

Effect of annually repeated weed harrowing against Chenopodium album (L.) in organically grown spring cereals. (2022). Agricultural and Food Science, 31(2), 113–122. https://doi.org/10.23986/afsci.115327 (Original work published 2022)
Received 2022-03-09
Accepted 2022-05-16
Published 2022-07-07