Model of Gray Leaf Spot

Gray Leaf Spot of maize Cercospora zeae-maydis Risk Model:

x) Calculation performed in the time between stage V4 and V12:

x) Number of hours with temperatures from 22°C to 30°C divided by (2.305*2) plus hours of relative humidity > 90% during night divided by (3.30*2). This value can
x) range from 0 to 100.


Literature: Paul, P.A. and G.P.Munkvold 2004: Regression and Artificial Neural Network Modeling for the Prediction of Gray Leaf Spot of Maize,
Phyto-95-0388; http://apsjournals.apsnet.org/doi/pdf/10.1094/PHYTO-95-0388?cookieSet=1