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PaulMelloy / cercospoRa

A R package for determining the timing of Cercospora beticola epidemics in sugar beet
https://paulmelloy.github.io/cercospoRa/
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Wolf definition of LP #22

Open Facuriy opened 3 months ago

Facuriy commented 3 months ago

in wolf 2005 the formula for latent period has an error, it lacks negative sign to the exponent. image from: Wolf, P. F. J.; Verreet, J. A. 2005 Factors affecting the onset of cercospora leaf spot epidemics in sugar beet and establishment of disease-monitoring thresholds 10.1094/PHYTO-95-0269 however in older literature where the generated formula comes from it is correct. image from: P. F. J. Wolf; Heindl, M.; Verreet, J. A. 2001 Zum Einfluß des Bestandesklimas auf die Prädisposition der Zuckerrübe gegenüber Infektionen von Cercospora beticola (Sacc.) Influence of sugar beet leaf mass development on predisposition of the crop to Cerco- spora beticola (Sacc.) https://www.researchgate.net/publication/237563305_Zum_Einfluss_des_Bestandesklimas_auf_die_Pradisposition_der_Zuckerrube_gegenuber_Infektionen_von_Cercospora_beticola_Sacc_Influence_of_sugar_beet_leaf_mass_development_on_predisposition_of_the_crop_to

PaulMelloy commented 3 months ago

Thanks Facundo,

I noticed this is a error in wolf and Verreet's paper. The formula in the package to return latent period produces the following plot

plot(latent_period(9:35), x = 9:35, 
     xlab = "Temperature C",
     ylab = "days",
     pch = 16)

image

If I go in and change -0.35 to 0.35 the following response is given for the same code above.

image