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Velvetleaf (Abutilon theophrasti) Population Dynamics Following a Single Year's Seed Rain

Published online by Cambridge University Press:  12 June 2017

Robert G. Hartzler
Robert G. Hartzler*
Affiliation:
Dep. Agron., Iowa State Univ., Ames, IA 50011
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Abstract

At a northern Iowa location, populations of 145, 203, 62, and 37 velvetleaf plants/m2 emerged in the four years following seed production by 0.4 velvetleaf plants/m2 growing in soybean. Annual velvetleaf densities in areas with no seed input averaged less than 6 plants/m2. At a central Iowa location, verticillium wilt reduced velvetleaf seed production, resulting in an average increase of 9 plants/m2 in the two years following seed production compared to the control treatment. This type of information is necessary to develop economic optimum thresholds, but the variability between locations demonstrates the difficulty in predicting crop and weed responses to management strategies implemented early in the growing season.

Keywords

Velvetleaf, Abutilon theophrasti Medikus ♯3ABUTHcorn, Zea mays L.soybean, Glycine max (L.) Merr.Tillageweed seedbank

Information

Type
Research
Information
Weed Technology , Volume 10 , Issue 3 , September 1996, pp. 581 - 586
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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