Level of threshold weed density does not affect the long-term …
May 1, 1997 · It is shown that long-term application of thresholds results in a control frequency that is independent of threshold level, and in aperiodic dynamics of the weed population which …
Dynamics of weed populations : spatial pattern formation and ...
The dynamics of a weed population subjected to such a 'threshold control programme' is characterized by aperiodic (quasi-periodic or chaotic) cycles, whereas the long-term herbicide …
However, because most weed populations generate effects that carry over to following years, an eco-nomically-defined action threshold that deals solely with impact in the current sea-son is …
Economic Thresholds and the Case for Longer Term Approaches …
Jan 20, 2017 · There are some theoretical concerns with applying a static approach such as the economic threshold to weed management decision making. An improvement is to adopt a …
Regardless of the type, thresholds imply that weed effects are population dependent, and as such, allow some type of prediction to be made relative to the consequences of control decisions.
A Computable Economic Threshold Model for Weeds in Field …
It is shown that long-term application of thresholds results in a control frequency that is independent of threshold level, and in aperiodic dynamics of the weed population which may …
optimal over a number of seasons? Wallinga and van Oijen, writing in the current issue of Crop Protection', show in fact that the choice of threshold level does not affect the long term