Summary:
The CPO Septoria model estimates risk of septoria tritici blotch infections in winter wheat. Weather data from GS 32 to GS 69 are used. Spraying is recommended after minimum 4 days with rain (> 1mm) in susceptible cultivars counting days between GS 32 and GS 69. In resistant cultivars risk of attack is assumed after 5 days with rain (>1mm) between GS 37 and GS 69. Counting of days with rain goes back a maximum of 30 days.