The Psa Risk Model shows current and forecast daily assessments of Psa infection risk based on weather. This gives growers a heads up of upcoming high-risk periods to assist planning of pruning and spray rounds.

Through the leaf-fall period, application of winter rate copper to protect new leaf scars is recommended, and after pruning rounds copper should be applied to protect pruning wounds.

Weather forecasts are also available via the model, as are chill unit calculators showing seasonal and historical chill unit data. Chill unit comparisons are available across years and between locations.

A reminder that when logged in you can also click the ‘Station Locations’ link to the right of the options box to see exactly where the weather stations are in your area.