Abstract
The weed Phalaris brachystachys Link (short-spiked canarygrass) severely affects cereal production in regions with a Mediterranean climate. A mathematical model for simulating the population dynamics of this weed was constructed using previously reported brachystachys populations.
Highlights
The model was used to describe the long-term dynamics of the population in the absence of control practices and to predict the effect of various control strategies based on the annual application of herbicides at 50%, 75% and 100% of the standard rate in winter wheat
The aim of this study is to describe a mathematical model for short-spiked canarygrass and use it to explore a variety of tactical control scenarios
Experimental results obtained from numerous trials indicate that the level of P. brachystachys control achieved with commercial herbicides applied at standard rates (100%) presents a decrease population size by 90% (Ticket, 1999)
Summary
The model was used to describe the long-term dynamics of the population in the absence of control practices and to predict the effect of various control strategies based on the annual application of herbicides at 50%, 75% and 100% of the standard rate in winter wheat. Sensitivity analysis indicated that seedbank dynamics was sensitive to fecundity, seed bank mortality and seed losses, and that new control strategies should target these population parameters. Additional key words: density-dependence, population model, seed bank, sensitivity analysis, short-spiked canarygrass, simulation, winter wheat.
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