Degree Day Calculator

Living plants and plant pests develop according to degree days.  A calendar does not provide an accurate forecast for scouting for various pests.  University  of Illinois has developed a degree day calculator to help farmers determine when to look for various insects and diseases.  It is kind of late for this year, but the calculator might be a good tool for next year.  Keep in mind that degree days will vary field to field, so it is best to have temperature readings close by.