Abstract
This spreadsheet has been adapted by Agriculture and Agri-Food Canada from the Fire Blight Daily Risk Estimation Model developed by Tim Smith, Washington State University. This spreadsheet uses the information from this website and automates the calculation of the risk assessment through the use of a formula. With the results of the risk assessment, you can make a judgement for yourself if you need to make an application of a control product or not. If the model indicates that the risk of infection is low enough that you are not concerned, you can save yourself the time and the money needed for an application, whereas if the model indicates that you will be at a high risk in the coming days, you may want to consider making a treatment.