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Weed Demography and Population Dynamics: Implications for Threshold Management

Published online by Cambridge University Press:  12 June 2017

Nicholas Jordan
Nicholas Jordan*
Affiliation:
Division of Science, Northeast Missouri State University, Kirksville, MO 63501
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Abstract

Threshold weed management methods have recently been elaborated to consider effects of threshold management on weed population dynamics. Such economic optimum thresholds are calculated using population-dynamics models which require detailed information about weed demography, including seed production (as affected by events between germination and seed dispersal), seed dispersal, and seed survival and movement in soil. Factors affecting any of these aspects of demography appear likely to modulate the growth rate of a sub-threshold population and therefore to influence the economic optimum threshold value. To test this conjecture and evaluate weed threshold management, including associated risk, improved understanding is particularly needed of weed seed dispersal, seedbank processes, and unpredictable demographic variation.

Keywords

Population ecologyeconomic optimum thresholdrisk analysis

Information

Type
Symposium
Information
Weed Technology , Volume 6 , Issue 1 , March 1992 , pp. 184 - 190
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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