Model "Phytophtora infestans"

Calculation of sporulation start at night with relative humidity above 80%. If sporulation takes place and it is raining the infection starts to be caluclated at air temperatures between 10 and 30 °C.

The calculation for sporulation stops if solar radiation is above 700, and relative humidity below 40.

The calculation  for infection stops if relative humidity falls below 80%.

Severity values are calculated from 0 to 5 (if infection has been determined) with 0 : very low pressure and 5 : high pressure.