Welcome to the new potato report for 2012! As always, we will be tracking DSVs for Late blight development and calculating P-days for initiating the first early blight fungicide application. Remember the threshold for P-days is 300! Once 300 P-days is reached for your location early blight fungicide applications should be initiated.
Growers who are interested in using this model should chose the location above that is closest in proximity to their farming operation and should regularly check the Cornell NEWA website (http://newa.cornell.edu/) where this information is compiled from. Click on Pests Forecasts from the menu, select your weather station, and click on tomato diseases, set accumulation start date and a table of daily and total DSVs will be generated.
July 10, 2012