Potato Crop Development
WI-MN Cooperative Extension
Agricultural Weather Page
Introduction
P-Days are the unit of thermal time used in a number of University of
Wisconsin-Extension IPM potato management products. To learn more about
these products, visit UW's
Integrated Pest Management site.
Below you will find P-Day maps for:
- May 15 to the present
- May 1 to May 14
- May 7 to May 14
You can correct P-Day values from the May 15 starting date map (Map 1) for
your planting date by adding additional P-Days from Map 2 or Map 3 as
appropriate.
Schedule
Map is updated daily at about 11:30 am, from
May 1 through mid-June, depending slightly on the season.
May 15 to Present
Download The Image in Black and White
Earlier P-Day Maps (available mid-May)
For further information on this page,
contact Bill Bland at the Dept. of Soil
Science, Univ. of Wisconsin-Madison
Bill Bland, wlbland@facstaff.wisc.edu
