Practical Use of the C.beticola Models

Sugarbeet Header

All three models are indicating periods of risk for Cercospora beticola. The model checking if the incubation period of Cercospora beticola can be fulfilled within a fortnight will be helpful in spring and early summer to indicate an early appearance of this disease like it happens in many parts of Europe in the season 2000. The ckeck for sporulation possibilities and the risk model using incubation period and sporulation possibilities will indicate periods of high disease pressure in the running season like the DIV infection model from University of Minesota Crookston. The DIV model indicates a spray when we have had 2 consecutive days with DIV values of 6 or higher. Combining the DIV model with the output of the CercoPRI model gives an indication when we have apply the first spray and when a spray should e repeated.