This page describes the parameters that can be used to customize Lange. The model was developed by Lange2008;textualbarrks. Look here to find out how to apply the model.
The date, when the degree days start to sum up ('MM-DD').
Base temperature to calculate degree days to trigger the onset.
Degree days that are required to trigger the onset of
infestation. Additionally, the maximum temperature must exceed tfly.
Minimum temperature that beetles need to fly.
Base temperatures to calculate degree days for the different stages in the following order: egg, larva, pupa, juvenile adult.
Thermal thresholds for the different stages in the following order: egg, larva, pupa, juvenile adult.
Date when the model ends (no further development will be modeled).
Date before which no mortality will be modeled.
Temperature threshold below which white stages (egg, larva, pupa) will die.
In barrks, model() is used to customize a model. The following code
illustrates which parameters are available for the Lange model and specifies their
default values.
model("lange", # ==== onset ==== #
dd_onset_start_date = '01-01',
dd_onset_base = 5,
dd_onset_threshold = 110,
# ==== onset + development ====
tfly = 19.5,
# ==== development ==== #
dd_base_stages = c(10.6, 8.2, 9.9, 3.2),
dd_threshold_stages = c(51.8, 204.4, 57.7, 238.5),
model_end_date = '12-31',
# ==== mortality ==== #
first_lethal_date = '09-01',
tlethal = 0
)
model(), phenology(), model.lange.apply
Other model customizations:
model.bso.customize,
model.chapy.customize,
model.joensson.customize,
model.phenips.customize,
model.phenips_clim.customize,
model.rity.customize