magarey.model: The Magarey model

In ZeBook: Working with Dynamic Models for Agriculture and Environment

Description

Generic model of infection for foliar diseases caused by fungi (from Magarey et al.,2005).

Usage

magarey.model(T, Tmin, Topt, Tmax, Wmin, Wmax)

Arguments

T	: input variable. Either a scalar or a vector (for a weather series).
Tmin	: parameter of minimal temperature for infection (degC)
Topt	: parameter of optimal temperature for infection (degC)
Tmax	: parameter of maximal temperature for infection (degC)
Wmin	: parameter of minimal wetness duration for infection (hour)
Wmax	: parameter of maximal wetness duration for infection (hour)

Value

Wetness duration (W, hour). Either a scalar or a vector depending on T.

Examples

plot(1:35, magarey.model (1:35,7, 18, 30, 10, 42), type="l", xlab="T", ylab="W")

Example output

Loading required package: triangle
Loading required package: deSolve

ZeBook documentation built on May 1, 2019, 9:48 p.m.