Cornell Decision Support Home

The Potato/Tomato Late Blight Decision Support System (DSS) is a brand new disease management tool.  It enables you to use weather (including farm-specific National Weather Service forecasts) to predict the need for future fungicide applications to control late blight. In addition, the DSS includes:

i) standard Blitecast readings (severity values); 

ii) predicted Blitecast readings based on future weather;

iii) another disease forecast system (Simcast) that includes fungicide weathering and varietal susceptibility in determining the need for fungicide; and

iv) opportunity to experiment (virtually) with different fungicide strategies before actually making an application.

The DSS allows you to set up individual fields or farm locations that you would expect to have different climate conditions because of elevation or exposure.  It saves the information for each field or farm for the season, allowing you to record fungicide applications and track fungicide weathering along with the disease severity.

To use the DSS you'll need some training and an account.  Contact Laura Joseph ( about setting up an account and arranging training.

Click here to view a recent publication on the DSS and its development.

Use the following link to go to the DSS web page.

For a "How-To" on the DSS, please consult the webinar below (conducted on May 30th, 2012)