setTreatment {landsepi} | R Documentation |
Set chemical treatments
Description
Updates a LandsepiParams object with treatment parameters
Usage
setTreatment(params, treatment_params)
Arguments
params |
a LandsepiParams Object. |
treatment_params |
list of parameters related to pesticide treatments:
|
Details
Chemical treatment is applied in a polygon only if disease severity (i.e. I/N) in
this polygon exceeds the threshold given by treatment_application_threshold
.
Treatment efficiency is maximum (i.e. equal to the parameter treatment_efficiency)
at the time of treatment application (noted ); then it decreases with time
(i.e. natural pesticide degradation) and host growth (i.e. new biomass is not protected
by treatments): protected by treatments):Efficiency of the treatment at time t after the application date is given by:
with
:
is the reduction of fungicide concentration due to time (e.g. natural degradation, volatilization, weathering), with
the timelag passed since the time of treatment application.
-
is the reduction of fungicide concentration due to plant growth, since new plant tissue is not covered by fungicide.
and
being the number of host individuals a the time of treatment
and at time
, respectively.
-
and
are shape parameters.
An empty list of treatments (i.e. absence of application) can be loaded using
loadPathogen
.
Value
a LandsepiParams object
See Also
Examples
## Not run:
t <- loadTreatment()
simul_params <- setTreatment(simul_params, t)
simul_params@Treatment
## End(Not run)