Calculate Cercospora Latent Period

Usage

latent_period(Tm, ref = "wolf")

Arguments

Tm: numeric, Average temperature in degrees Celsius for a hour of the day
ref: character, method for calculating latent period. Default is "wolf" also available "jarroudi". See references for where formulas were used

Value

numeric, Latent period for a given hour. ref = "jarroudi" returns latent period in days.

Details

Calculates the latent period for Cercospora beticola infections on sugar beet. Note the published formula in Wolf and Verreet (2005) contains an error in the exponent. e(0.35 x (Tm - 10)) should be e(-0.35 x (Tm - 10)). See issue #22 on Github for additional information.

References

Wolf, P. F. J., and J. A. Verreet. “Factors Affecting the Onset of Cercospora Leaf Spot Epidemics in Sugar Beet and Establishment of Disease-Monitoring Thresholds.” Phytopathology® 95, no. 3 (March 2005): 269–74. https://doi.org/10.1094/PHYTO-95-0269.

El Jarroudi, Moussa, Fadia Chairi, Louis Kouadio, Kathleen Antoons, Abdoul-Hamid Mohamed Sallah, and Xavier Fettweis. “Weather-Based Predictive Modeling of Cercospora Beticola Infection Events in Sugar Beet in Belgium.” Journal of Fungi 7, no. 9 (September 18, 2021): 777. https://doi.org/10.3390/jof7090777.