| Early Blight Degree Days Worksheet and Late Blight update 2009 | |||||||||||
| 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: | |||||||||||
| 2009 | |||||||||||
| Degree | Degree | ||||||||||
| Days | Days | 30 yr avg. | 30 yr avg. | ||||||||
| Date | High temp | Low temp | above 45 | D-days | positive | Cumulative | 2008 | positive | Cumulative | ||
| 5/5/2009 | 70.4 | 40.0 | 1 | 10.2 | 10.2 | 10.2 | 8.4 | 2.6 | 2.6 | ||
| 5/6/2009 | 79.4 | 36.7 | 1 | 13.1 | 13.1 | 23.3 | 13.8 | 2.2 | 4.8 | ||
| 5/7/2009 | 78.6 | 35.9 | 1 | 12.3 | 12.3 | 35.5 | 20.9 | 2.5 | 7.2 | ||
| 5/8/2009 | 76.5 | 40.1 | 1 | 13.3 | 13.3 | 48.8 | 22.1 | 2.9 | 10.1 | ||
| 5/9/2009 | 75.2 | 33.6 | 1 | 9.4 | 9.4 | 58.2 | 22.5 | 3.8 | 13.9 | ||
| 5/10/2009 | 76.0 | 39.1 | 1 | 12.6 | 12.6 | 70.8 | 22.5 | 4.0 | 17.9 | ||
| 5/11/2009 | 77.4 | 41.4 | 1 | 14.4 | 14.4 | 85.2 | 25.1 | 4.8 | 22.6 | ||
| 5/12/2009 | 76.2 | 41.6 | 1 | 13.9 | 13.9 | 99.1 | 34.1 | 3.7 | 26.3 | ||
| 5/13/2009 | 77.4 | 40.5 | 1 | 14.0 | 14.0 | 113.0 | 34.1 | 3.7 | 30.0 | ||
| 5/14/2009 | 74.8 | 38.0 | 1 | 11.4 | 11.4 | 124.4 | 34.1 | 4.7 | 34.7 | ||
| 5/15/2009 | 72.3 | 36.1 | 1 | 9.2 | 9.2 | 133.6 | 34.4 | 5.6 | 40.3 | ||
| 5/16/2009 | 69.6 | 40.8 | 1 | 10.2 | 10.2 | 143.8 | 35.8 | 5.2 | 45.5 | ||
| 5/17/2009 | 75.2 | 34.0 | 1 | 9.6 | 9.6 | 153.4 | 46.4 | 4.8 | 50.3 | ||
| 5/18/2009 | 78.3 | 44.4 | 1 | 16.4 | 16.4 | 169.8 | 58.1 | 6.3 | 56.6 | ||
| 5/19/2009 | 75.2 | 45.0 | 1 | 15.1 | 15.1 | 184.9 | 74.9 | 6.2 | 62.8 | ||
| 5/20/2009 | 73.1 | 44.4 | 1 | 13.8 | 13.8 | 198.6 | 91.7 | 7.1 | 69.9 | ||
| 5/21/2009 | 62.4 | 46.1 | 1 | 9.3 | 9.3 | 207.9 | 108.2 | 7.2 | 77.1 | ||
| 5/22/2009 | 63.4 | 44.4 | 1 | 8.9 | 8.9 | 216.8 | 108.2 | 7.9 | 85.0 | ||
| 5/23/2009 | 65.2 | 47.9 | 1 | 11.6 | 11.6 | 228.3 | 108.2 | 7.6 | 92.6 | ||
| 5/24/2009 | 61.5 | 44.5 | 1 | 8.0 | 8.0 | 236.3 | 108.2 | 7.6 | 100.2 | ||
| 5/25/2009 | 60.1 | 42.0 | 1 | 6.1 | 6.1 | 242.4 | 113.4 | 7.4 | 107.5 | ||
| 5/26/2009 | 59.4 | 40.1 | 1 | 4.8 | 4.8 | 247.1 | 122.8 | 8.3 | 115.8 | ||
| 5/27/2009 | 64.2 | 42.7 | 1 | 8.5 | 8.5 | 255.6 | 133.3 | 8.6 | 124.4 | ||
| 5/28/2009 | 68.7 | 36.7 | 1 | 7.7 | 7.7 | 263.3 | 143.2 | 8.3 | 132.7 | ||
| 5/29/2009 | 67.8 | 40.7 | 1 | 9.3 | 9.3 | 272.5 | 153.7 | 8.2 | 140.9 | ||
| 5/30/2009 | 67.7 | 41.8 | 1 | 9.8 | 9.8 | 282.3 | 162.1 | 8.9 | 149.8 | ||
| 5/31/2009 | 64.0 | 42.0 | 1 | 8.0 | 8.0 | 290.3 | 174.5 | 9.2 | 159.0 | ||
| 6/1/2009 | 63.7 | 38.6 | 1 | 6.2 | 6.2 | 296.4 | 190.1 | 8.5 | 167.4 | ||
| 6/2/2009 | 63.2 | 42.5 | 1 | 7.9 | 7.9 | 304.3 | 204.1 | 8.6 | 176.0 | ||
| 6/3/2009 | 62.1 | 38.3 | 1 | 5.2 | 5.2 | 309.5 | 217.2 | 9.2 | 185.2 | ||
| 6/4/2009 | 68.6 | 37.8 | 1 | 8.2 | 8.2 | 317.7 | 228.1 | 10.0 | 195.2 | ||
| 6/5/2009 | 70.0 | 43.1 | 1 | 11.6 | 11.6 | 329.2 | 229.5 | 11.2 | 206.4 | ||
| 6/6/2009 | 68.9 | 47.2 | 1 | 13.1 | 13.1 | 342.3 | 237.2 | 11.7 | 218.0 | ||
| 6/7/2009 | 64.9 | 40.0 | 1 | 7.5 | 7.5 | 349.7 | 248.2 | 11.0 | 229.0 | ||
| 6/8/2009 | 69.9 | 35.0 | 1 | 7.5 | 7.5 | 357.2 | 256.7 | 11.0 | 240.0 | ||
| 6/9/2009 | 67.7 | 41.3 | 1 | 9.5 | 9.5 | 366.7 | 262.6 | 11.0 | 251.0 | ||
| 6/10/2009 | 61.2 | 42.7 | 1 | 7.0 | 7.0 | 373.6 | 275.6 | 10.9 | 261.8 | ||
| 6/11/2009 | 70.7 | 40.0 | 1 | 10.4 | 10.4 | 384.0 | 282.8 | 11.7 | 273.5 | ||
| 6/12/2009 | 74.4 | 36.6 | 1 | 10.5 | 10.5 | 394.5 | 285.5 | 12.6 | 286.1 | ||
| 6/13/2009 | 76.2 | 38.4 | 1 | 12.3 | 12.3 | 406.8 | 293.8 | 13.3 | 299.3 | ||
| 6/14/2009 | 72.6 | 41.2 | 1 | 11.9 | 11.9 | 418.7 | 307.5 | 13.7 | 313.0 | ||
| 6/15/2009 | 72.3 | 40.3 | 1 | 11.3 | 11.3 | 430.0 | 326.5 | 13.4 | 326.4 | ||
| 6/16/2009 | 73.1 | 43.1 | 1 | 13.1 | 13.1 | 443.1 | 345.6 | 13.6 | 340.0 | ||
| 6/17/2009 | 78.0 | 42.2 | 1 | 15.1 | 15.1 | 458.2 | 364.4 | 13.7 | 353.7 | ||
| 6/18/2009 | 73.7 | 40.9 | 1 | 12.3 | 12.3 | 470.5 | 382.7 | 14.7 | 368.4 | ||
| 6/19/2009 | 77.5 | 38.7 | 1 | 13.1 | 13.1 | 483.6 | 399.2 | 14.1 | 382.3 | ||
| 6/20/2009 | 62.1 | 45.6 | 1 | 8.9 | 8.9 | 492.4 | 415.4 | 15.4 | 397.7 | ||
| 6/21/2009 | 75.3 | 40.7 | 1 | 13.0 | 13.0 | 505.4 | 431.1 | 16.1 | 413.8 | ||
| 6/22/2009 | 81.2 | 42.1 | 1 | 16.7 | 16.7 | 522.1 | 443.8 | 16.1 | 429.9 | ||
| 6/23/2009 | 75.0 | 41.3 | 1 | 13.2 | 13.2 | 535.2 | 456.6 | 16.2 | 446.0 | ||
| 6/24/2009 | 80.2 | 50.2 | 1 | 20.2 | 20.2 | 555.4 | 469.4 | 15.8 | 461.8 | ||
| 6/25/2009 | 77.6 | 55.6 | 1 | 21.6 | 21.6 | 577.0 | 486.8 | 16.1 | 477.9 | ||
| 6/26/2009 | 72.5 | 50.9 | 1 | 16.7 | 16.7 | 593.7 | 501.8 | 15.9 | 493.8 | ||
| 6/27/2009 | 75.5 | 47.1 | 1 | 16.3 | 16.3 | 610.0 | 521.9 | 17.8 | 510.4 | ||
| 6/28/2009 | 77.8 | 48.8 | 1 | 18.3 | 18.3 | 628.3 | 541.8 | 17.2 | 528.2 | ||
| 6/29/2009 | 78.0 | 47.8 | 1 | 17.9 | 17.9 | 646.2 | 559.0 | 17.2 | 545.4 | ||
| 6/30/2009 | 81.4 | 48.3 | 1 | 19.9 | 19.9 | 666.1 | 574.5 | 17.1 | 562.5 | ||
| 7/1/2009 | 77.4 | 46.7 | 1 | 17.1 | 17.1 | 683.1 | 591.7 | 17.5 | 580.0 | ||
| 7/2/2009 | 76.2 | 47.7 | 1 | 17.0 | 17.0 | 700.1 | 610.8 | 17.9 | 597.9 | ||
| 7/3/2009 | 75.6 | 53.7 | 1 | 19.7 | 19.7 | 719.7 | 628.5 | 18.1 | 616.0 | ||
| 7/4/2009 | 78.1 | 49.5 | 1 | 18.8 | 18.8 | 738.5 | 647.8 | 17.7 | 633.6 | ||
| 7/5/2009 | 72.4 | 48.7 | 1 | 15.6 | 15.6 | 754.1 | 666.5 | 18.1 | 651.7 | ||
| 7/6/2009 | 69.5 | 46.7 | 1 | 13.1 | 13.1 | 767.2 | 686.2 | 17.6 | 669.3 | ||
| 7/7/2009 | 79.2 | 40.2 | 1 | 14.7 | 14.7 | 781.9 | 703.3 | 18.2 | 687.4 | ||
| 7/8/2009 | 83.2 | 43.9 | 1 | 18.6 | 18.6 | 800.4 | 720.1 | 18.1 | 705.5 | ||
| 7/9/2009 | 82.5 | 44.2 | 1 | 18.4 | 18.4 | 818.8 | 737.0 | 17.9 | 723.3 | ||
| 7/10/2009 | 83.4 | 49.2 | 1 | 21.3 | 21.3 | 840.1 | 755.5 | 18.8 | 742.1 | ||
| 7/11/2009 | 84.2 | 47.2 | 1 | 20.7 | 20.7 | 860.8 | 774.8 | 18.4 | 760.4 | ||
| 7/12/2009 | 83.6 | 49.2 | 1 | 21.4 | 21.4 | 882.2 | 791.5 | 18.3 | 778.7 | ||
| 7/13/2009 | 76.8 | 48.6 | 1 | 17.7 | 17.7 | 899.9 | 807.5 | 17.9 | 796.6 | ||
| 7/14/2009 | 81.9 | 45.9 | 1 | 18.9 | 18.9 | 918.8 | 826.9 | 18.4 | 815.0 | ||
| 7/15/2009 | 79.1 | 47.9 | 1 | 18.5 | 18.5 | 937.3 | 846.9 | 17.7 | 832.7 | ||
| 7/16/2009 | 82.9 | 46.5 | 1 | 19.7 | 19.7 | 957.0 | 866.7 | 18.1 | 850.7 | ||
| 7/17/2009 | 86.1 | 46.6 | 1 | 21.4 | 21.4 | 978.3 | 885.1 | 18.1 | 868.8 | ||
| 7/18/2009 | 85.4 | 43.2 | 1 | 19.3 | 19.3 | 997.6 | 904.1 | 18.1 | 886.9 | ||
| 7/19/2009 | 79.1 | 44.2 | 1 | 16.7 | 16.7 | 1014.3 | 923.9 | 18.4 | 905.3 | ||
| 7/20/2009 | 81.5 | 48.5 | 1 | 20.0 | 20.0 | 1034.3 | 941.5 | 17.6 | 922.9 | ||
| 7/21/2009 | 74.6 | 46.8 | 1 | 15.7 | 15.7 | 1050.0 | 961.7 | 17.7 | 940.6 | ||
| 7/22/2009 | 81.4 | 43.6 | 1 | 17.5 | 17.5 | 1067.5 | 983.3 | 17.8 | 958.3 | ||
| 7/23/2009 | 84.1 | 44.7 | 1 | 19.4 | 19.4 | 1086.9 | 1002.9 | 17.5 | 975.8 | ||
| 7/24/2009 | 85.5 | 46.1 | 1 | 20.8 | 20.8 | 1107.7 | 1023.8 | 17.2 | 993.0 | ||
| 7/25/2009 | 83.7 | 48.1 | 1 | 20.9 | 20.9 | 1128.6 | 1044.0 | 17.8 | 1010.7 | ||
| 7/26/2009 | 73.1 | 48.9 | 1 | 16.0 | 16.0 | 1144.6 | 1063.2 | 17.8 | 1028.5 | ||
| 7/27/2009 | 80.1 | 47.3 | 1 | 18.7 | 18.7 | 1163.3 | 1085.7 | 17.4 | 1045.9 | ||
| 7/28/2009 | 77.8 | 46.3 | 1 | 17.1 | 17.1 | 1180.3 | 1106.6 | 18.1 | 1064.0 | ||
| 7/29/2009 | 73.9 | 46.7 | 1 | 15.3 | 15.3 | 1195.6 | 1127.0 | 18.1 | 1082.1 | ||
| 7/30/2009 | 72.5 | 43.7 | 1 | 13.1 | 13.1 | 1208.7 | 1147.0 | 18.7 | 1100.7 | ||
| 7/31/2009 | 70.1 | 41.0 | 1 | 10.6 | 10.6 | 1219.3 | 1168.0 | 18.0 | 1118.7 | ||
| 8/1/2009 | 78.6 | 43.0 | 1 | 15.8 | 15.8 | 1235.1 | 1187.6 | 18.1 | 1136.8 | ||
| 8/2/2009 | 79.1 | 43.8 | 1 | 16.5 | 16.5 | 1251.5 | 1208.6 | 17.9 | 1154.7 | ||
| 8/3/2009 | 79.8 | 44.4 | 1 | 17.1 | 17.1 | 1268.6 | 1228.9 | 17.1 | 1171.8 | ||
| 8/4/2009 | 82.4 | 45.2 | 1 | 18.8 | 18.8 | 1287.4 | 1249.5 | 17.1 | 1188.8 | ||
| 8/5/2009 | 84.0 | 43.0 | 1 | 18.5 | 18.5 | 1305.9 | 1268.8 | 17.2 | 1206.0 | ||
| 8/6/2009 | 82.5 | 48.4 | 1 | 20.5 | 20.5 | 1326.4 | 1288.0 | 17.2 | 1223.1 | ||
| 8/7/2009 | 78.2 | 45.6 | 1 | 16.9 | 16.9 | 1343.3 | 1309.8 | 17.8 | 1240.9 | ||
| 8/8/2009 | 76.8 | 41.9 | 1 | 14.4 | 14.4 | 1357.6 | 1327.7 | 17.5 | 1258.4 | ||
| 8/9/2009 | 79.1 | 35.1 | 1 | 12.1 | 12.1 | 1369.7 | 1348.4 | 16.8 | 1275.2 | ||
| 8/10/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1364.9 | 16.1 | 1291.3 | ||||
| 8/11/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1383.9 | 16.1 | 1307.3 | ||||
| 8/12/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1403.8 | 16.6 | 1323.9 | ||||
| 8/13/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1419.6 | 16.0 | 1339.9 | ||||
| 8/14/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1436.5 | 15.4 | 1355.3 | ||||
| 8/15/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1448.8 | 15.6 | 1370.8 | ||||
| 8/16/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1457.9 | 16.1 | 1386.9 | ||||
| 8/17/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1465.7 | 16.4 | 1403.3 | ||||
| 8/18/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1477.6 | 16.1 | 1419.4 | ||||
| 8/19/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1492.5 | 16.2 | 1435.6 | ||||
| 8/20/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1509.2 | 15.3 | 1450.9 | ||||
| 8/21/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1524.4 | 15.4 | 1466.3 | ||||
| 8/22/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1543.8 | 15.3 | 1481.6 | ||||
| 8/23/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1563.4 | 15.3 | 1496.9 | ||||
| 8/24/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1583.2 | 15.1 | 1512.0 | ||||
| 8/25/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1597.9 | 14.9 | 1526.9 | ||||
| 8/26/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1613.45 | ||||||
| 8/27/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1633.5 | ||||||
| 8/28/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1651.2 | ||||||
| 8/29/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1667.8 | ||||||
| 8/30/2009 | 0 | 0.0 | 0.0 | 1369.7 | 1685.5 | ||||||
| If you have any questions please contact Rob Davidson, (719)754-3494 or | |||||||||||
| Andrew Houser (719)754-3494 ext. 26 | |||||||||||