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The Seedbank Dynamics of Feral Rye (Secale cereale)

Published online by Cambridge University Press:  20 January 2017

William L. Stump  and
Philip Westra
William L. Stump
Affiliation:
Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO 80523
Philip Westra*
Affiliation:
Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO 80523
*
Corresponding author's E-mail: [email protected].
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Abstract

Buried feral rye seeds were rapidly depleted in soil in the first year due to in situ germination. Less than 1% of the viable seeds persisted after 45 mo of burial. Although after 5 yr, a small number of seedlings still emerged, soil seedbank decline was rapid when seed production was prevented. A low level of induced dormancy was detected and may explain the small populations of feral rye that persisted. Seed and seedling population shifts were large over a 5-yr period and were related to environmental conditions. Tillage or chemical control of feral rye in the fallow period reduced populations compared to the untreated weedy check. Moldboard plowing provided the greatest feral rye control compared to shallow tillage and chemical fallow. Feral rye seedbank populations rebounded following a wet final year of the study. These results help explain feral rye persistence in a wheat–fallow agroecosystem by the persistence of a small portion of the seedbank and by large seed inputs into the system during environmentally favorable years. Feral rye reduced wheat yield as much as 92% and represented up to 73% contamination in harvested wheat.

Keywords

Feral ryeSecale cereale L. # SECCEVolunteer ryedormancypopulation dynamicsseed burialferal rye managementweed competition
Type
Research
Information
Weed Technology , Volume 14 , Issue 1 , March 2000 , pp. 7 - 14
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Present address: Department of Plant Sciences, University of Wyoming, Laramie, WY 82071.

References

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