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The Effects of Quackgrass on Germination and Seedling Development of Certain Crop Plants

Published online by Cambridge University Press:  12 June 2017

Thor Kommedahl
Affiliation:
Department of Plant Pathology and Botany, Institute of Agriculture, University of Minnesota, Saint Paul, Minnesota
J. B. Kotheimer
Affiliation:
Department of Plant Pathology and Botany, Institute of Agriculture, University of Minnesota, Saint Paul, Minnesota
J. V. Bernardini
Affiliation:
Department of Plant Pathology and Botany, Institute of Agriculture, University of Minnesota, Saint Paul, Minnesota
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Extract

Most of the evidence for the production of toxic substances, by one plant, that affect the growth and survival of another, is circumstantial, according to a review by Bonner (5). There is direct evidence that the leaves of Artemisia absinthium L. (3), Encelia farinosa A. Gray (6), and Thamnosma montana Torr. & Frem. (2), produce substances which are toxic to other plants. A substance has been isolated from the roots of guayule which is toxic to guayule but which is unimportant agriculturally because this substance remains only a short time in the soil (4). Also dead brome grass roots have been found to be toxic to brome seedlings (1); however the evidence here is indirect (5). Le Tourneau et al. (13) have shown also that water extracts from tissues of many crops and weeds inhibit germination of wheat.

Type
Research Article
Copyright
Copyright © 1959 Weed Science Society of America 

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References

Literature Cited

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