Early Blight Degree Days Worksheet and Late Blight update 2013
Early Blight Threshold = 650 Degree Days
The last Date the Degree Days were updated is in bold.
Late Blight Update:  
For Late blight control,  based on the timing of the disease threshold from previous years, conditions favorable for late
blight are typically reached around the 15th of July. 
Fungicide applications for control of late blight should be made prior to row closure and at least one to two weeks prior 
to July 15th.  For current late blight updates, please continue to check this webpage throughout the summer.
Early Blight Degree Days Worksheet:
Degree Day Formula:  If max temp. >45F then DD = ((max temp.+ min. temp.)/2)-45
Early Blight Threshold = 650 Degree Days The last Date the Degree Days were updated is in bold.
2013
Degree Degree
above Days Days 30 yr avg. 30 yr avg.
Date High temp Low temp 45 D-days positive Cumulative 2012 positive Cumulative
5/5/2013 60.5 31.0 1 0.8 0.8 0.8 10.9 2.6 2.6
5/6/2013 51.3 34.6 1 -2.1 0.0 0.8 22.9 2.2 4.8
5/7/2013 61.5 31.2 1 1.4 1.4 2.1 22.9 2.5 7.2
5/8/2013 52.6 35.6 1 -0.9 0.0 2.1 22.9 2.9 10.1
5/9/2013 50.6 31.8 1 -3.8 0.0 2.1 27.8 3.8 13.9
5/10/2013 61.2 29.2 1 0.2 0.2 2.3 36.1 4.0 17.9
5/11/2013 64.1 35.4 1 4.8 4.8 7.1 43.1 4.8 22.6
5/12/2013 69.9 33.8 1 6.9 6.9 13.9 45.1 3.7 26.3
5/13/2013 77.3 42.0 1 14.7 14.7 28.6 45.1 3.7 30.0
5/14/2013 73.5 40.6 1 12.1 12.1 40.6 50.5 4.7 34.7
5/15/2013 72.3 42.6 1 12.5 12.5 53.1 57.7 5.6 40.3
5/16/2013 71.5 35.8 1 8.7 8.7 61.7 68.3 5.2 45.5
5/17/2013 74.5 39.8 1 12.2 12.2 73.9 79.8 4.8 50.3
5/18/2013 69.3 39.3 1 9.3 9.3 83.2 88.6 6.3 56.6
5/19/2013 55.5 32.5 1 -1.0 0.0 83.2 95.7 6.2 62.8
5/20/2013 62.4 30.7 1 1.6 1.6 84.7 104.2 7.1 69.9
5/21/2013 66.2 33.8 1 5.0 5.0 89.7 116.5 7.2 77.1
5/22/2013 75.7 39.1 1 12.4 12.4 102.1 132.2 7.9 85.0
5/23/2013 76.5 36.3 1 11.4 11.4 113.5 147.6 7.6 92.6
5/24/2013 76.7 37.0 1 11.9 11.9 125.4 157.0 7.6 100.2
5/25/2013 77.7 40.0 1 13.9 13.9 139.2 168.5 7.4 107.5
5/26/2013 77.8 46.3 1 17.1 17.1 156.3 183.6 8.3 115.8
5/27/2013 74.9 42.8 1 13.9 13.9 170.1 186.1 8.6 124.4
5/28/2013 71.7 36.6 1 9.2 9.2 179.3 190.7 8.3 132.7
5/29/2013 67.4 41.4 1 9.4 9.4 188.7 201.4 8.2 140.9
5/30/2013 72.1 36 1 9.1 9.1 197.7 214.0 8.9 149.8
5/31/2013 72.3 35.3 1 8.8 8.8 206.5 226.5 9.2 159.0
6/1/2013 70.2 30.7 1 5.5 5.5 212.0 241.9 8.5 167.4
6/2/2013 79.1 34.7 1 11.9 11.9 223.9 253.7 8.6 176.0
6/3/2013 77.7 40.3 1 14.0 14.0 237.9 271.9 9.2 185.2
6/4/2013 74.3 41.3 1 12.8 12.8 250.7 287.6 10.0 195.2
6/5/2013 75.4 41.0 1 13.2 13.2 263.9 301.7 11.2 206.4
6/6/2013 75.1 34.5 1 9.8 9.8 273.7 316.8 11.7 218.0
6/7/2013 71.6 40.6 1 11.1 11.1 284.8 330.4 11.0 229.0
6/8/2013 83.4 41.0 1 17.2 17.2 302.0 346.2 11.0 240.0
6/9/2013 84.4 41.7 1 18.1 18.1 320.0 361.4 11.0 251.0
6/10/2013 90.1 48.2 1 24.2 24.2 344.2 376.7 10.9 261.8
6/11/2013 84.6 47.9 1 21.3 21.3 365.4 387.4 11.7 273.5
6/12/2013 85.1 47.2 1 21.2 21.2 386.6 401.0 12.6 286.1
6/13/2013 87.3 46.5 1 21.9 21.9 408.5 417.6 13.3 299.3
6/14/2013 84.8 50.7 1 22.8 22.8 431.2 433.7 13.7 313.0
6/15/2013 80.2 41.1 1 15.7 15.7 446.9 450.8 13.4 326.4
6/16/2013 76.4 45.8 1 16.1 16.1 463.0 469.3 13.6 340.0
6/17/2013 77.9 40.4 1 14.2 14.2 477.1 486.7 13.7 353.7
6/18/2013 77.3 43.4 1 15.4 15.4 492.5 508.3 14.7 368.4
6/19/2013 82.4 38.4 1 15.4 15.4 507.9 529.7 14.1 382.3
6/20/2013 82.2 39.8 1 16.0 16.0 523.9 551.0 15.4 397.7
6/21/2013 81.4 38.6 1 15.0 15.0 538.9 572.2 16.1 413.8
6/22/2013 80.0 46.3 1 18.2 18.2 557.0 593.3 16.1 429.9
6/23/2013 82.8 39.9 1 16.4 16.4 573.4 619.1 16.2 446.0
6/24/2013 78.3 43.3 1 15.8 15.8 589.2 643.0 15.8 461.8
6/25/2013 80.6 45.3 1 18.0 18.0 607.1 665.7 16.1 477.9
6/26/2013 86.3 52.6 1 24.5 24.5 631.6 688.1 15.9 493.8
6/27/2013 89.8 56.4 1 28.1 28.1 659.7 710.1 17.8 510.4
6/28/2013 83.9 53.8 1 23.9 23.9 683.5 729.8 17.2 528.2
6/29/2013 80.1 47.5 1 18.8 18.8 702.3 751.3 17.2 545.4
6/30/2013 77.9 46.0 1 17.0 17.0 719.3 774.7 17.1 562.5
7/1/2013 76.8 45.0 1 15.9 15.9 735.2 798.7 17.5 580.0
7/2/2013 78.3 47.3 1 17.8 17.8 753.0 820.1 17.9 597.9
7/3/2013 76.5 43.7 1 15.1 15.1 768.1 840.1 18.1 616.0
7/4/2013 81.9 48.1 1 20.0 20.0 788.1 859.5 17.7 633.6
7/5/2013 75.1 49.7 1 17.4 17.4 805.5 879.9 18.1 651.7
7/6/2013 80.8 48.2 1 19.5 19.5 825.0 899.8 17.6 669.3
7/7/2013 84.7 51.8 1 23.3 23.3 848.2 917.2 18.2 687.4
7/8/2013 79.2 52.1 1 20.7 20.7 868.9 934.1 18.1 705.5
7/9/2013 86.0 54.0 1 25.0 25.0 893.9 953.2 17.9 723.3
7/10/2013 81.8 52.2 1 22.0 22.0 915.9 972.2 18.8 742.1
7/11/2013 80.7 47.5 1 19.1 19.1 935.0 987.8 18.4 760.4
7/12/2013 79.4 55.4 1 22.4 22.4 957.4 1008.6 18.3 778.7
7/13/2013 80.8 51.3 1 21.1 21.1 978.4 1029.2 17.9 796.6
7/14/2013 82.8 52.9 1 22.9 22.9 1001.3 1049.0 18.4 815.0
7/15/2013 68.7 52.5 1 15.6 15.6 1016.9 1068.6 17.7 832.7
7/16/2013 75.2 48.4 1 16.8 16.8 1033.7 1088.6 18.1 850.7
7/17/2013 77.6 45.9 1 16.8 16.8 1050.4 1106.9 18.1 868.8
7/18/2013 81.8 46.8 1 19.3 19.3 1069.7 1126.5 18.1 886.9
7/19/2013 79.9 50.5 1 20.2 20.2 1089.9 1148.8 18.4 905.3
7/20/2013 84.6 50.5 1 22.6 22.6 1112.5 1170.9 17.6 922.9
7/21/2013 83.7 50.2 1 22.0 22.0 1134.4 1194.2 17.7 940.6
7/22/2013 86.8 51.7 1 24.3 24.3 1158.7 1215.3 17.8 958.3
7/23/2013 87.9 50.5 1 24.2 24.2 1182.9 1238.9 17.5 975.8
7/24/2013 79.6 53.6 1 21.6 21.6 1204.5 1258.8 17.2 993.0
7/25/2013 80.8 48.3 1 19.6 19.6 1224.0 1280.6 17.8 1010.7
7/26/2013 78.7 46.9 1 17.8 17.8 1241.8 1301.3 17.8 1028.5
7/27/2013 73.4 45.7 1 14.6 14.6 1256.4 1318.0 17.4 1045.9
7/28/2013 66.8 49.6 1 13.2 13.2 1269.6 1337.9 18.1 1064.0
7/29/2013 72.2 47.7 1 15.0 15.0 1284.5 1360.6 18.1 1082.1
7/30/2013     0 0.0 0.0 1284.5 1384.2 18.7 1100.7
7/31/2013     0 0.0 0.0 1284.5 1407.6 18.0 1118.7
8/1/2013     0 0.0 0.0 1284.5 1428.3 18.1 1136.8
8/2/2013     0 0.0 0.0 1284.5 1447.1 17.9 1154.7
8/3/2013     0 0.0 0.0 1284.5 1463.5 17.1 1171.8
8/4/2013     0 0.0 0.0 1284.5 1482.3 17.1 1188.8
8/5/2013     0 0.0 0.0 1284.5 1498.2 17.2 1206.0
8/6/2013     0 0.0 0.0 1284.5 1519.2 17.2 1223.1
8/7/2013     0 0.0 0.0 1284.5 1540.5 17.8 1240.9
8/8/2013     0 0.0 0.0 1284.5 1562.5 17.5 1258.4
8/9/2013     0 0.0 0.0 1284.5 1581.4 16.8 1275.2
8/10/2013     0 0.0 0.0 1284.5 1602.3 16.1 1291.3
8/11/2013     0 0.0 0.0 1284.5 1620.8 16.1 1307.3
8/12/2013     0 0.0 0.0 1284.5 1640.4 16.6 1323.9
8/13/2013     0 0.0 0.0 1284.5 1654.8 16.0 1339.9
8/14/2013     0 0.0 0.0 1284.5 1671.2 15.4 1355.3
8/15/2013     0 0.0 0.0 1284.5 1688.4 15.6 1370.8
8/16/2013     0 0.0 0.0 1284.5 1705.9 16.1 1386.9
8/17/2013     0 0.0 0.0 1284.5 1723.5 16.4 1403.3
8/18/2013     0 0.0 0.0 1284.5 1741.3 16.1 1419.4
8/19/2013     0 0.0 0.0 1284.5 1759.1 16.2 1435.6
8/20/2013     0 0.0 0.0 1284.5 1771.6 15.3 1450.9
8/21/2013     0 0.0 0.0 1284.5 1788.4 15.4 1466.3
8/22/2013     0 0.0 0.0 1284.5 1806.5 15.3 1481.6
8/23/2013     0 0.0 0.0 1284.5 1824.2 15.3 1496.9
8/24/2013     0 0.0 0.0 1284.5 1841.0 15.1 1512.0
8/25/2013     0 0.0 0.0 1284.5 1859.8 14.9 1526.9
8/26/2013     0 0.0 0.0 1284.5 1877.7 14.4 1541.3
8/27/2013     0 0.0 0.0 1284.5 1896.8 14.7 1556.0
8/28/2013     0 0.0 0.0 1284.5 1916.9 14.8 1570.8
8/29/2013     0 0.0 0.0 1284.5 1937.2 14.5 1585.3
8/30/2013     0 0.0 0.0 1284.5 1956.8 13.9 1599.2
8/31/2013     0 0.0 0.0 1284.5 1976.0 13.5 1612.7
To hear the disease phone message report call (719)754-3494 ext. 39
If you have any questions please contact Rob Davidson, (719)754-3496 or 
Andrew Houser (719)754-3494 ext. 26