magarey.model {ZeBook}

The Magarey model

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")