SOIL DEGREE DAY ACCUMULATION FOR NEMATODE CONTROL 
RUSSET NORKOTAH, SLV RESEARCH CENTER - 2014
For root-knot nematode control, Vydate applications should begin at 800 Degree-days (DD5Celcius)
or 1,440 DD41Fahrenheit.  To estimate that date, add the number of "Total  DD" on the day you planted
to 800 (or 1,440).  Where that value occurs in the "Total DD" column estimates the date on
which 800 DD5C or 1,440 DD41F will occur in that field.
Contacts for questions: Russ Ingham 541-737-5255
Rob Davidson 719-754-3494 ext. 15
Andrew Houser 719-754-3494 ext. 26
This information can also be found on the SLV Research Center Website:  
http://www.colostate.edu/Depts/SLVRC/disease/nematode.htm
This data was updated Tuesday, July 15, 2014
Data after that date are estimated using average temperature for the previous 7 days.
The last date when the Degree Days were updated is in bold.
Avg.  HISTORICAL
GROWING AVE SOIL DAILY TOTAL AVE SOIL DAILY 2014 TOTAL 2002- TOTAL DD41F
MONTH DAY DAYS TEMP - C DD5C DD5C TEMP F DD41F DD41F   2012 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
1-May 1 1 13.0 8.0 8.0 55.4 14.4 14.4   11.3 17.3 15.4 10.1 9.9 16.0 15.2 17.11 15 10 10
2-May 2 2 13.8 8.8 16.8 56.9 15.9 30.3   23.0 31.1 30.9 16.0 19.6 32.4 26.0 33.98 31 18 18
3-May 3 3 15.9 10.9 27.7 60.6 19.6 49.9   35.5 45.1 48.7 24.4 31.8 46.5 37.5 50.97 49 26 26
4-May 4 4 16.3 11.3 39.0 61.3 20.3 70.1   49.8 60.7 68.6 37.0 47.5 61.6 51.8 67.1 68 37 37
5-May 5 5 16.9 11.9 50.9 62.5 21.5 91.6   64.9 76.3 89.1 51.7 65.0 78.1 68.4 81.84 87 48 48
6-May 6 6 17.6 12.6 63.5 63.6 22.6 114.2   79.9 90.7 109.6 68.5 83.1 96.3 85.7 93.68 105 60 60
7-May 7 7 17.0 12.0 75.5 62.6 21.6 135.9   95.2 103.3 125.8 87.5 102.1 116.4 103.8 107.2 123 72 72
8-May 8 8 15.1 10.1 85.5 59.1 18.1 153.9   110.9 116.7 138.6 106.9 122.3 138.0 121.3 122.9 142 84 84
9-May 9 9 12.5 7.5 93.0 54.5 13.5 167.4   127.0 126.8 154.6 126.2 144.0 159.8 137.4 140.2 160 98 98
10-May 10 10 11.4 6.4 99.4 52.5 11.5 179.0   143.6 137.6 173.5 144.0 165.9 182.1 154.2 159.5 176 115 115
11-May 11 11 11.7 6.7 106.1 53.1 12.1 191.0   160.9 151.7 192.0 161.6 185.7 205.2 170.9 180.6 193 131 131
12-May 12 12 9.2 4.2 110.3 48.6 7.6 198.6   178.5 168.8 207.2 176.8 205.4 228.7 189.6 202.8 212 146 146
13-May 13 13 7.7 2.7 113.0 45.9 4.9 203.4   196.6 188.8 218.9 194.6 224.8 252.6 207.8 224.9 233 162 162
14-May 14 14 8.1 3.1 116.1 46.6 5.6 209.0   215.3 208.9 233.6 213.7 244.6 276.9 223.7 246.6 254 179 179
15-May 15 15 10.3 5.3 121.4 50.5 9.5 218.6   234.7 228.8 252.5 233.3 263.6 301.2 240.6 268.3 276 197 197
16-May 16 16 12.2 7.2 128.6 54.0 13.0 231.5   256.4 247.8 273.3 254.6 285.1 326.1 257.1 289.3 300 224 224
17-May 17 17 13.7 8.7 137.3 56.7 15.7 247.2   277.6 268.0 294.8 276.1 309.2 352.1 276.4 309.5 323 244 244
18-May 18 18 14.4 9.4 146.7 57.9 16.9 264.1   299.3 288.6 315.9 295.5 332.8 379.4 297.5 331.4 348 263 263
19-May 19 19 15.6 10.6 157.3 60.1 19.1 283.2   321.1 307.3 337.5 312.1 353.9 405.5 320.8 355 373 286 286
20-May 20 20 15.5 10.5 167.8 59.9 18.9 302.1   342.8 321.5 360.1 326.2 378.0 431.5 345.4 376.8 398 310 310
21-May 21 21 14.0 9.0 176.8 57.2 16.2 318.3   364.8 336.6 384.8 341.1 405.1 455.7 370.5 396.2 425 335 335
22-May 22 22 14.8 9.8 186.6 58.6 17.6 335.9   386.9 355.6 410.3 356.9 433.0 479.1 392.0 413.7 449 361 361
23-May 23 23 15.4 10.4 197.0 59.7 18.7 354.6   408.8 376.9 435.7 373.9 461.6 501.5 409.8 429.3 471 387 387
24-May 24 24 14.4 9.4 206.4 57.9 16.9 371.6   431.0 400.3 461.6 391.7 488.8 523.6 426.2 442.6 495 415 415
25-May 25 25 14.1 9.1 215.5 57.4 16.4 387.9   453.9 424.4 487.0 411.0 514.4 544.2 445.3 458 522 442 442
26-May 26 26 15.1 10.1 225.6 59.2 18.2 406.1   477.4 449.5 513.0 432.3 541.5 563.6 466.9 475.8 550 469 469
27-May 27 27 17.9 12.9 238.5 64.2 23.2 429.3   501.3 473.6 536.9 455.3 571.5 584.0 489.8 496.3 577 496 496
28-May 28 28 18.0 13.0 251.5 64.4 23.4 452.7   527.1 496.9 559.9 479.4 604.8 607.7 513.4 518.2 619 522 522
29-May 29 29 16.9 11.9 263.4 62.4 21.4 474.2   552.2 519.4 585.0 505.2 638.5 633.0 536.6 540 646 548 548
30-May 30 30 15.5 10.5 273.9 59.9 18.9 493.1   577.3 541.4 610.8 530.5 671.0 657.6 560.5 562.2 674 571 571
31-May 31 31 17.2 12.2 286.1 63.0 22.0 515.0   602.8 564.2 637.7 554.2 703.6 681.6 586.0 584.3 702 595 595
1-Jun 1 32 18.8 13.8 299.9 65.8 24.8 539.9   628.8 587.3 666.2 579.4 736.0 703.7 612.9 607.1 732 619 619
2-Jun 2 33 19.4 14.4 314.3 66.9 25.9 565.8   654.8 611.8 694.9 604.9 768.3 724.8 639.3 630.7 762 644 644
3-Jun 3 34 19.4 14.4 328.7 66.9 25.9 591.7   680.4 636.7 722.0 630.7 802.3 743.6 666.0 654 793 669 669
4-Jun 4 35 19.9 14.9 343.6 67.8 26.8 618.5   705.3 660.4 748.3 657.5 838.4 764.5 692.5 675.5 825 691 691
5-Jun 5 36 20.8 15.8 359.4 69.4 28.4 647.0   730.6 684.6 775.4 685.0 877.0 787.1 717.3 697.6 858 714 714
6-Jun 6 37 19.6 14.6 374.0 67.3 26.3 673.2   756.8 709.5 803.9 713.4 916.9 811.2 739.2 721 892 737 737
7-Jun 7 38 16.8 11.8 385.8 62.2 21.2 694.5   783.0 734.5 833.1 742.2 956.1 835.3 763.8 742.4 925 762 762
8-Jun 8 39 15.9 10.9 396.7 60.6 19.6 714.1   808.1 760.9 863.0 770.5 984.7 859.6 790.2 763.8 950 784 785
9-Jun 9 40 15.8 10.8 407.5 60.4 19.4 733.5   833.4 790.1 892.6 799.3 1011.1 885.7 815.5 786.9 973 803 809
10-Jun 10 41 17.6 12.6 420.1 63.7 22.7 756.2   858.7 821.4 922.7 827.8 1040.3 903.9 840.1 811.5 998 823 833
11-Jun 11 42 17.0 12.0 432.1 62.6 21.6 777.8   883.8 853.3 951.6 857.0 1066.9 920.7 860.6 837.4 1027 844 856
12-Jun 12 43 15.5 10.5 442.6 59.9 18.9 796.7   908.3 884.4 981.3 885.9 1086.9 938.8 879.0 862.2 1059 864 880
13-Jun 13 44 16.0 11.0 453.6 60.8 19.8 816.5   932.5 914.9 1006.4 914.2 1109.2 957.4 900.3 883.1 1088 888 903
14-Jun 14 45 17.3 12.3 465.9 63.1 22.1 838.7   956.4 944.6 1030.0 934.6 1130.5 978.3 925.6 904.7 1114 914 927
15-Jun 15 46 16.7 11.7 477.6 62.1 21.1 859.7   980.9 971.1 1056.2 959.8 1150.5 999.7 953.3 929.5 1140 940 951
16-Jun 16 47 18.0 13.0 490.6 64.4 23.4 883.1   1005.9 997.0 1085.1 988.4 1172.4 1021.9 977.5 956.3 1164 968 975
17-Jun 17 48 17.8 12.8 503.4 64.0 23.0 906.2   1031.3 1022.6 1114.6 1016.9 1198.6 1046.6 999.4 983.9 1187 993 998
18-Jun 18 49 18.0 13.0 516.4 64.4 23.4 929.6   1057.3 1049.2 1143.3 1044.5 1223.3 1069.7 1025.7 1013 1215 1021 1022
19-Jun 19 50 18.5 13.5 529.9 65.3 24.3 953.9   1083.6 1080.5 1166.4 1072.7 1246.8 1092.4 1053.5 1037 1247 1052 1045
20-Jun 20 51 18.5 13.5 543.4 65.3 24.3 978.2   1109.6 1105.6 1194.1 1097.3 1274.1 1115.0 1079.2 1066 1276 1084 1069
21-Jun 21 52 16.4 11.4 554.8 61.5 20.5 998.7   1134.9 1126.1 1222.1 1119.3 1300.7 1137.1 1104.7 1096 1303 1114 1093
22-Jun 22 53 16.7 11.7 566.5 62.1 21.1 1019.7   1158.9 1148.1 1246.8 1146.2 1321.6 1160.0 1128.4 1120 1331 1139 1116
23-Jun 23 54 17.5 12.5 579.0 63.5 22.5 1042.2   1183.8 1171.3 1275.2 1177.2 1345.6 1182.0 1149.7 1148 1357 1165 1140
24-Jun 24 55 18.6 13.6 592.6 65.5 24.5 1066.7   1209.4 1196.4 1306.8 1203.5 1370.9 1209.0 1170.1 1179 1384 1191 1164
25-Jun 25 56 17.4 12.4 605.0 63.3 22.3 1089.0   1234.7   1220.2 1339.2 1227.1 1393.3 1235.2 1190.4 1210 1412 1214 1187
26-Jun 26 57 17.5 12.5 617.5 63.5 22.5 1111.5   1259.3 1243.7 1370.7 1252.6 1416.4 1257.8 1210.1 1240 1436 1236 1211
27-Jun 27 58 17.0 12.0 629.5 62.6 21.6 1133.1   1283.3 1272.3 1397.3 1279.3 1440.8 1279.3 1231.8 1265 1455 1262 1235
28-Jun 28 59 18.9 13.9 643.4 66.0 25.0 1158.2   1308.5 1302.0 1422.2 1308.6 1466.0 1301.6 1255.2 1292 1477 1287 1258
29-Jun 29 60 20.5 15.5 658.9 68.9 27.9 1186.1   1333.1 1326.3 1446.2 1334.2 1489.3 1327.1 1279.6 1320 1501 1309 1282
30-Jun 30 61 19.5 14.5 673.4 67.1 26.1 1212.2   1357.2 1348.5 1470.0 1358.9 1512.6 1356.1 1300.7 1345 1525 1335 1306
1-Jul 1 62 17.7 12.7 686.1 63.9 22.9 1235.0   1382.0 1370.5 1495.7 1382.1 1535.8 1384.1 1321.7 1373 1552 1361 1329
2-Jul 2 63 18.8 13.8 699.9 65.8 24.8 1259.9   1407.3 1393.7 1523.6 1405.4 1560.3 1406.8 1345.2 1404 1579 1385 1353
3-Jul 3 64 17.9 12.9 712.8 64.2 23.2 1283.1   1432.4 1416.5 1547.2 1431.5 1583.9 1429.7 1367.6 1435 1604 1411 1377
4-Jul 4 65 17.3 12.3 725.1 63.1 22.1 1305.2   1456.9 1439.8 1570.7 1461.4 1607.6 1452.5 1390.1 1462 1628 1438 1400
5-Jul 5 66 18.9 13.9 739.0 66.0 25.0 1330.2   1480.9 1463.2 1594.8 1483.0 1633.2 1476.0 1415.2 1487 1652 1464 1424
6-Jul 6 67 20.9 15.9 754.9 69.6 28.6 1358.9   1504.1 1485.1 1618.0 1501.1 1659.3 1497.1 1440.3 1513 1676 1487 1448
7-Jul 7 68 20.7 15.7 770.6 69.3 28.3 1387.1   1526.7 1508.7 1640.7 1518.9 1681.0 1518.3 1463.0 1537 1698 1512 1471
8-Jul 8 69 18.0 13.0 783.6 64.4 23.4 1410.5   1550.1 1533.2 1662.3 1548.6 1700.5 1540.4 1484.7 1561 1719 1536 1495
9-Jul 9 70 18.3 13.3 796.9 64.9 23.9 1434.5   1573.3 1557.4 1684.7 1575.7 1721.0 1563.3 1505.3 1586 1739 1562 1519
10-Jul 10 71 19.0 14.0 810.9 66.2 25.2 1459.7   1597.0   1579.5 1706.5 1603.8 1742.9 1587.2 1528.1 1609 1760 1590 1542
11-Jul 11 72 18.8 13.8 824.7 65.8 24.8 1484.5   1620.6 1602.5 1728.0 1629.7 1763.7 1612.2 1551.3 1632 1780 1619 1566
12-Jul 12 73 19.7 14.7 839.4 67.5 26.5 1511.0   1644.0 1625.8 1749.5 1653.3 1785.1 1639.4 1573.9 1654 1801 1646 1590
13-Jul 13 74 21.6 16.6 856.0 70.9 29.9 1540.8   1667.8 1649.1 1772.3 1677.4 1806.1 1665.7 1598.3 1676 1823 1672 1613
14-Jul 14 75 20.6 15.6 871.6 69.1 28.1 1568.9   1691.4 1672.5 1794.9 1702.5 1828.2 1689.7 1623.9 1699 1846 1698 1637
15-Jul 15 76 18.0 13.0 884.6 64.4 23.4 1592.3   1714.7   1695.1 1816.3 1726.4 1851.0 1712.5 1647.5 1722 1869 1722 1660
16-Jul 16 77 19.4 14.4 899.1 67.0 26.0 1618.3   1738.3 1716.4 1837.7 1749.5 1874.5 1734.4 1671.3 1746 1895 1747 1684
17-Jul 17 78 19.4 14.4 913.5 67.0 26.0 1644.3   1761.8 1737.8 1858.6 1774.8 1898.1 1757.3 1694.5 1770 1921 1773 1708
18-Jul 18 79 19.4 14.4 927.9 67.0 26.0 1670.2   1785.2 1759.6 1878.9 1801.8 1920.2 1780.7 1716.5 1793 1945 1799 1731
19-Jul 19 80 19.4 14.4 942.3 67.0 26.0 1696.2   1808.7 1781.4 1900.0 1827.5 1942.3 1803.6 1738.3 1815 1969 1824 1755
20-Jul 20 81 19.4 14.4 956.8 67.0 26.0 1722.2   1832.8 1804.0 1922.7 1851.9 1964.8 1827.3 1762.2 1838 1994 1850 1779
21-Jul 21 82 19.4 14.4 971.2 67.0 26.0 1748.2   1856.6 1826.5 1946.6 1875.5 1987.8 1849.1 1788.0 1861 2018 1875 1802
22-Jul 22 83 19.4 14.4 985.6 67.0 26.0 1774.1   1880.0 1847.6 1972.1 1899.5 2010.1 1869.9 1812.6 1885 2042 1900 1826
23-Jul 23 84 19.4 14.4 1000.1 67.0 26.0 1800.1   1903.6 1869.9 1998.4 1923.9 2032.2 1892.2 1836.0 1910 2064 1926 1850
24-Jul 24 85 19.4 14.4 1014.5 67.0 26.0 1826.1   1926.6 1891.7 2021.9 1949.5 2053.5 1914.9 1857.1 1936 2087 1950 1873
25-Jul 25 86 19.4 14.4 1028.9 67.0 26.0 1852.0   1949.5 1913.3 2044.5 1976.4 2075.5 1937.9 1877.6 1960 2109 1972 1897
26-Jul 26 87 19.4 14.4 1043.3 67.0 26.0 1878.0   1972.1 1935.1 2067.3 2001.5 2097.1 1959.5 1898.5 1984 2132 1994 1921
27-Jul 27 88 19.4 14.4 1057.8 67.0 26.0 1904.0   1994.2 1956.0 2088.5 2025.2 2119.2 1980.8 1919.9 2006 2153 2016 1944
28-Jul 28 89 19.4 14.4 1072.2 67.0 26.0 1930.0   2015.9 1975.9 2109.4 2048.6 2140.5 2001.9 1941.5 2029 2174 2037 1968
29-Jul 29 90 19.4 14.4 1086.6 67.0 26.0 1955.9   2036.9 1995.6 2131.8 2063.9 2162.4 2021.1 1963.0 2051 2195 2058 1992
30-Jul 30 91 19.4 14.4 1101.1 67.0 26.0 1981.9   2057.3 2013.2 2155.1 2079.0 2184.0 2039.6 1984.2 2074 2217 2080 2015
31-Jul 31 92 19.4 14.4 1115.5 67.0 26.0 2007.9   2078.5 2033.3 2178.9 2094.0 2206.4 2056.9 2006.3 2097 2240 2102 2039
1-Aug 1 93 19.4 14.4 1129.9 67.0 26.0 2033.8   2099.7 2053.4 2200.9 2109.7 2229.2 2073.9 2029.4 2120 2262 2124 2063
2-Aug 2 94 19.4 14.4 1144.3 67.0 26.0 2059.8   2121.4 2073.6 2221.8 2133.2 2252.3 2092.1 2051.0 2144 2284 2146 2086
3-Aug 3 95 19.4 14.4 1158.8 67.0 26.0 2085.8   2142.9 2094.5 2241.2 2156.0 2275.5 2110.6 2073.4 2168 2304 2169 2110
4-Aug 4 96 19.4 14.4 1173.2 67.0 26.0 2111.8   2164.5 2115.5 2261.0 2177.5 2298.3 2129.9 2095.8 2191 2325 2191 2134
5-Aug 5 97 19.4 14.4 1187.6 67.0 26.0 2137.7   2186.2 2137.0 2282.5 2197.8 2321.2 2149.5 2118.1 2215 2346 2212 2157
6-Aug 6 98 19.4 14.4 1202.1 67.0 26.0 2163.7   2208.3 2157.7 2305.2 2218.3 2344.2 2169.7 2140.5 2240 2368 2232 2181
7-Aug 7 99 19.4 14.4 1216.5 67.0 26.0 2189.7   2229.8 2176.6 2327.3 2240.0 2365.8 2189.4 2163.9 2263 2388 2253 2205
8-Aug 8 100 19.4 14.4 1230.9 67.0 26.0 2215.6   2250.8 2194.0 2349.0   2386.4 2207.4 2186.6 2285 2409 2275 2228
9-Aug 9 101 19.4 14.4 1245.3 67.0 26.0 2241.6   2271.8 2210.9 2372.0   2405.6 2225.0 2209.7 2308 2431 2295 2252
10-Aug 10 102 19.4 14.4 1259.8 67.0 26.0 2267.6   2293.0 2228.2 2394.4   2425.2 2243.9 2231.8 2332 2454 2316 2275
11-Aug 11 103 19.4 14.4 1274.2 67.0 26.0 2293.6   2313.9 2244.8 2413.9   2445.2 2263.0 2253.7 2354 2477 2338 2299
12-Aug 12 104 19.4 14.4 1288.6 67.0 26.0 2319.5   2334.8 2262.1 2433.8   2465.2 2283.2 2276.1 2377 2499 2358 2323
13-Aug 13 105 19.4 14.4 1303.1 67.0 26.0 2345.5   2355.5 2279.0 2453.5   2484.8 2302.8 2296.9 2400 2521 2378 2346
14-Aug 14 106 19.4 14.4 1317.5 67.0 26.0 2371.5   2376.1 2296.6 2473.1   2503.9 2321.8 2316.6 2423 2544 2398 2370
15-Aug 15 107 19.4 14.4 1331.9 67.0 26.0 2397.4   2396.6 2315.2 2492.8   2522.6 2340.2 2335.7 2446 2566 2417 2394
16-Aug 16 108 19.4 14.4 1346.3 67.0 26.0 2423.4   2417.3 2335.0 2514.1   2541.5 2358.4 2352.8 2470 2588 2437 2417
17-Aug 17 109 19.4 14.4 1360.8 67.0 26.0 2449.4   2438.1 2355.3 2535.8   2560.2 2377.2 2369.3 2495 2611 2456 2441
18-Aug 18 110 19.4 14.4 1375.2 67.0 26.0 2475.4   2458.6 2376.2 2556.3   2578.2 2394.1 2387.0 2518 2634 2475 2465
19-Aug 19 111 19.4 14.4 1389.6 67.0 26.0 2501.3   2479.9 2398.0 2577.3   2597.5 2412.5 2408.1 2541 2656 2494 2488
20-Aug 20 112 19.4 14.4 1404.1 67.0 26.0 2527.3   2501.9 2420.1 2597.2   2617.7 2434.3 2431.5 2566 2678 2513 2512
21-Aug 21 113 19.4 14.4 1418.5 67.0 26.0 2553.3   2524.2 2444.0 2616.8   2636.6 2456.4 2454.3 2592 2701 2533 2536
22-Aug 22 114 19.4 14.4 1432.9 67.0 26.0 2579.2   2547.0 2468.7 2638.8   2656.0 2480.4 2476.2 2617 2725 2554 2559
23-Aug 23 115 19.4 14.4 1447.3 67.0 26.0 2605.2   2569.6 2492.3 2660.8   2676.9 2504.8 2499.9 2642 2748 2573 2583
24-Aug 24 116 19.4 14.4 1461.8 67.0 26.0 2631.2   2591.6 2516.2 2681.0   2696.5 2525.0 2524.6 2667 2773 2591 2607
25-Aug 25 117 19.4 14.4 1476.2 67.0 26.0 2657.2   2613.4 2540.0 2702.1   2716.3 2543.9 2547.3 2690 2796 2611 2630
26-Aug 26 118 19.4 14.4 1490.6 67.0 26.0 2683.1   2635.2 2564.8 2724.2   2735.7 2564.5 2567.4 2714 2818 2631 2654
27-Aug 27 119 19.4 14.4 1505.1 67.0 26.0 2709.1   2657.2 2589.5 2747.3   2755.9 2586.2 2590.2 2739 2839 2648 2678
28-Aug 28 120 19.4 14.4 1519.5 67.0 26.0 2735.1   2679.5 2615.8 2770.6   2775.2 2608.2 2610.5 2763 2861 2667 2701
29-Aug 29 121 19.4 14.4 1533.9 67.0 26.0 2761.0     2643.5 2796.1   2794.6 2631.2   2787 2882 2688 2725
30-Aug 30 122 19.4 14.4 1548.3 67.0 26.0 2787.0     2671.7 2824.1   2814.0 2653.8   2811 2905 2710 2749
31-Aug 31 123                   2850.8   2833.3 2675.0   2837 2930 2730 2772
1-Sep 1 124                   2873.3   2851.5 2694.4   2862 2955 2750 2796
2-Sep 2 125                   2896.9     2714.2   2887 2979 2769 2819
3-Sep 3 126                   2923.1     2736.8   2914 3004 2787 2843
4-Sep 4 127                   2944.3     2758.3   2905 3029 2805 2867
5-Sep 5 128                   2965.5     2779.4   2896 3053 2824 2890
SOIL DEGREE DAY ACCUMULATION FOR NEMATODE CONTROL 
RUSSET NORKOTAH, SLV RESEARCH CENTER - 2014
For root-knot nematode control, Vydate applications should begin at 800 Degree-days (DD5Celcius)
or 1,440 DD41Fahrenheit.  To estimate that date, add the number of "Total  DD" on the day you planted
to 800 (or 1,440).  Where that value occurs in the "Total DD" column estimates the date on
which 800 DD5C or 1,440 DD41F will occur in that field.
Contacts for questions: Russ Ingham 541-737-5255
Rob Davidson 719-754-3494 ext. 15
Andrew Houser 719-754-3494 ext. 26
This information can also be found on the SLV Research Center Website:  
http://www.colostate.edu/Depts/SLVRC/disease/nematode.htm
This data was updated Tuesday, July 22, 2014
Data after that date are estimated using average temperature for the previous 7 days.
The last date when the Degree Days were updated is in bold.
Avg.  HISTORICAL
GROWING AVE SOIL DAILY TOTAL AVE SOIL DAILY 2014 TOTAL 2002- TOTAL DD41F
MONTH DAY DAYS TEMP - C DD5C DD5C TEMP F DD41F DD41F   2012 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004
1-May 1 1 13.0 8.0 8.0 55.4 14.4 14.4   11.3 17.3 15.4 10.1 9.9 16.0 15.2 17.11 15 10 10  
2-May 2 2 13.8 8.8 16.8 56.9 15.9 30.3   23.0 31.1 30.9 16.0 19.6 32.4 26.0 33.98 31 18 18  
3-May 3 3 15.9 10.9 27.7 60.6 19.6 49.9   35.5 45.1 48.7 24.4 31.8 46.5 37.5 50.97 49 26 26  
4-May 4 4 16.3 11.3 39.0 61.3 20.3 70.1   49.8 60.7 68.6 37.0 47.5 61.6 51.8 67.1 68 37 37  
5-May 5 5 16.9 11.9 50.9 62.5 21.5 91.6   64.9 76.3 89.1 51.7 65.0 78.1 68.4 81.84 87 48 48  
6-May 6 6 17.6 12.6 63.5 63.6 22.6 114.2   79.9 90.7 109.6 68.5 83.1 96.3 85.7 93.68 105 60 60  
7-May 7 7 17.0 12.0 75.5 62.6 21.6 135.9   95.2 103.3 125.8 87.5 102.1 116.4 103.8 107.2 123 72 72  
8-May 8 8 15.1 10.1 85.5 59.1 18.1 153.9   110.9 116.7 138.6 106.9 122.3 138.0 121.3 122.9 142 84 84  
9-May 9 9 12.5 7.5 93.0 54.5 13.5 167.4   127.0 126.8 154.6 126.2 144.0 159.8 137.4 140.2 160 98 98  
10-May 10 10 11.4 6.4 99.4 52.5 11.5 179.0   143.6 137.6 173.5 144.0 165.9 182.1 154.2 159.5 176 115 115  
11-May 11 11 11.7 6.7 106.1 53.1 12.1 191.0   160.9 151.7 192.0 161.6 185.7 205.2 170.9 180.6 193 131 131  
12-May 12 12 9.2 4.2 110.3 48.6 7.6 198.6   178.5 168.8 207.2 176.8 205.4 228.7 189.6 202.8 212 146 146  
13-May 13 13 7.7 2.7 113.0 45.9 4.9 203.4   196.6 188.8 218.9 194.6 224.8 252.6 207.8 224.9 233 162 162  
14-May 14 14 8.1 3.1 116.1 46.6 5.6 209.0   215.3 208.9 233.6 213.7 244.6 276.9 223.7 246.6 254 179 179  
15-May 15 15 10.3 5.3 121.4 50.5 9.5 218.6   234.7 228.8 252.5 233.3 263.6 301.2 240.6 268.3 276 197 197  
16-May 16 16 12.2 7.2 128.6 54.0 13.0 231.5   256.4 247.8 273.3 254.6 285.1 326.1 257.1 289.3 300 224 224  
17-May 17 17 13.7 8.7 137.3 56.7 15.7 247.2   277.6 268.0 294.8 276.1 309.2 352.1 276.4 309.5 323 244 244  
18-May 18 18 14.4 9.4 146.7 57.9 16.9 264.1   299.3 288.6 315.9 295.5 332.8 379.4 297.5 331.4 348 263 263  
19-May 19 19 15.6 10.6 157.3 60.1 19.1 283.2   321.1 307.3 337.5 312.1 353.9 405.5 320.8 355 373 286 286  
20-May 20 20 15.5 10.5 167.8 59.9 18.9 302.1   342.8 321.5 360.1 326.2 378.0 431.5 345.4 376.8 398 310 310  
21-May 21 21 14.0 9.0 176.8 57.2 16.2 318.3   364.8 336.6 384.8 341.1 405.1 455.7 370.5 396.2 425 335 335  
22-May 22 22 14.8 9.8 186.6 58.6 17.6 335.9   386.9 355.6 410.3 356.9 433.0 479.1 392.0 413.7 449 361 361  
23-May 23 23 15.4 10.4 197.0 59.7 18.7 354.6   408.8 376.9 435.7 373.9 461.6 501.5 409.8 429.3 471 387 387  
24-May 24 24 14.4 9.4 206.4 57.9 16.9 371.6   431.0 400.3 461.6 391.7 488.8 523.6 426.2 442.6 495 415 415  
25-May 25 25 14.1 9.1 215.5 57.4 16.4 387.9   453.9 424.4 487.0 411.0 514.4 544.2 445.3 458 522 442 442  
26-May 26 26 15.1 10.1 225.6 59.2 18.2 406.1   477.4 449.5 513.0 432.3 541.5 563.6 466.9 475.8 550 469 469  
27-May 27 27 17.9 12.9 238.5 64.2 23.2 429.3   501.3 473.6 536.9 455.3 571.5 584.0 489.8 496.3 577 496 496  
28-May 28 28 18.0 13.0 251.5 64.4 23.4 452.7   527.1 496.9 559.9 479.4 604.8 607.7 513.4 518.2 619 522 522  
29-May 29 29 16.9 11.9 263.4 62.4 21.4 474.2   552.2 519.4 585.0 505.2 638.5 633.0 536.6 540 646 548 548  
30-May 30 30 15.5 10.5 273.9 59.9 18.9 493.1   577.3 541.4 610.8 530.5 671.0 657.6 560.5 562.2 674 571 571  
31-May 31 31 17.2 12.2 286.1 63.0 22.0 515.0   602.8 564.2 637.7 554.2 703.6 681.6 586.0 584.3 702 595 595  
1-Jun 1 32 18.8 13.8 299.9 65.8 24.8 539.9   628.8 587.3 666.2 579.4 736.0 703.7 612.9 607.1 732 619 619  
2-Jun 2 33 19.4 14.4 314.3 66.9 25.9 565.8   654.8 611.8 694.9 604.9 768.3 724.8 639.3 630.7 762 644 644  
3-Jun 3 34 19.4 14.4 328.7 66.9 25.9 591.7   680.4 636.7 722.0 630.7 802.3 743.6 666.0 654 793 669 669  
4-Jun 4 35 19.9 14.9 343.6 67.8 26.8 618.5   705.3 660.4 748.3 657.5 838.4 764.5 692.5 675.5 825 691 691  
5-Jun 5 36 20.8 15.8 359.4 69.4 28.4 647.0   730.6 684.6 775.4 685.0 877.0 787.1 717.3 697.6 858 714 714  
6-Jun 6 37 19.6 14.6 374.0 67.3 26.3 673.2   756.8 709.5 803.9 713.4 916.9 811.2 739.2 721 892 737 737  
7-Jun 7 38 16.8 11.8 385.8 62.2 21.2 694.5   783.0 734.5 833.1 742.2 956.1 835.3 763.8 742.4 925 762 762  
8-Jun 8 39 15.9 10.9 396.7 60.6 19.6 714.1   808.1 760.9 863.0 770.5 984.7 859.6 790.2 763.8 950 784 785  
9-Jun 9 40 15.8 10.8 407.5 60.4 19.4 733.5   833.4 790.1 892.6 799.3 1011.1 885.7 815.5 786.9 973 803 809  
10-Jun 10 41 17.6 12.6 420.1 63.7 22.7 756.2   858.7 821.4 922.7 827.8 1040.3 903.9 840.1 811.5 998 823 833  
11-Jun 11 42 17.0 12.0 432.1 62.6 21.6 777.8   883.8 853.3 951.6 857.0 1066.9 920.7 860.6 837.4 1027 844 856  
12-Jun 12 43 15.5 10.5 442.6 59.9 18.9 796.7   908.3 884.4 981.3 885.9 1086.9 938.8 879.0 862.2 1059 864 880  
13-Jun 13 44 16.0 11.0 453.6 60.8 19.8 816.5   932.5 914.9 1006.4 914.2 1109.2 957.4 900.3 883.1 1088 888 903  
14-Jun 14 45 17.3 12.3 465.9 63.1 22.1 838.7   956.4 944.6 1030.0 934.6 1130.5 978.3 925.6 904.7 1114 914 927  
15-Jun 15 46 16.7 11.7 477.6 62.1 21.1 859.7   980.9 971.1 1056.2 959.8 1150.5 999.7 953.3 929.5 1140 940 951  
16-Jun 16 47 18.0 13.0 490.6 64.4 23.4 883.1   1005.9 997.0 1085.1 988.4 1172.4 1021.9 977.5 956.3 1164 968 975  
17-Jun 17 48 17.8 12.8 503.4 64.0 23.0 906.2   1031.3 1022.6 1114.6 1016.9 1198.6 1046.6 999.4 983.9 1187 993 998  
18-Jun 18 49 18.0 13.0 516.4 64.4 23.4 929.6   1057.3 1049.2 1143.3 1044.5 1223.3 1069.7 1025.7 1013 1215 1021 1022  
19-Jun 19 50 18.5 13.5 529.9 65.3 24.3 953.9   1083.6 1080.5 1166.4 1072.7 1246.8 1092.4 1053.5 1037 1247 1052 1045  
20-Jun 20 51 18.5 13.5 543.4 65.3 24.3 978.2   1109.6 1105.6 1194.1 1097.3 1274.1 1115.0 1079.2 1066 1276 1084 1069  
21-Jun 21 52 16.4 11.4 554.8 61.5 20.5 998.7   1134.9 1126.1 1222.1 1119.3 1300.7 1137.1 1104.7 1096 1303 1114 1093  
22-Jun 22 53 16.7 11.7 566.5 62.1 21.1 1019.7   1158.9 1148.1 1246.8 1146.2 1321.6 1160.0 1128.4 1120 1331 1139 1116  
23-Jun 23 54 17.5 12.5 579.0 63.5 22.5 1042.2   1183.8 1171.3 1275.2 1177.2 1345.6 1182.0 1149.7 1148 1357 1165 1140  
24-Jun 24 55 18.6 13.6 592.6 65.5 24.5 1066.7   1209.4 1196.4 1306.8 1203.5 1370.9 1209.0 1170.1 1179 1384 1191 1164  
25-Jun 25 56 17.4 12.4 605.0 63.3 22.3 1089.0   1234.7   1220.2 1339.2 1227.1 1393.3 1235.2 1190.4 1210 1412 1214 1187      
26-Jun 26 57 17.5 12.5 617.5 63.5 22.5 1111.5   1259.3 1243.7 1370.7 1252.6 1416.4 1257.8 1210.1 1240 1436 1236 1211  
27-Jun 27 58 17.0 12.0 629.5 62.6 21.6 1133.1   1283.3 1272.3 1397.3 1279.3 1440.8 1279.3 1231.8 1265 1455 1262 1235  
28-Jun 28 59 18.9 13.9 643.4 66.0 25.0 1158.2   1308.5 1302.0 1422.2 1308.6 1466.0 1301.6 1255.2 1292 1477 1287 1258  
29-Jun 29 60 20.5 15.5 658.9 68.9 27.9 1186.1   1333.1 1326.3 1446.2 1334.2 1489.3 1327.1 1279.6 1320 1501 1309 1282  
30-Jun 30 61 19.5 14.5 673.4 67.1 26.1 1212.2   1357.2 1348.5 1470.0 1358.9 1512.6 1356.1 1300.7 1345 1525 1335 1306  
1-Jul 1 62 17.7 12.7 686.1 63.9 22.9 1235.0   1382.0 1370.5 1495.7 1382.1 1535.8 1384.1 1321.7 1373 1552 1361 1329  
2-Jul 2 63 18.8 13.8 699.9 65.8 24.8 1259.9   1407.3 1393.7 1523.6 1405.4 1560.3 1406.8 1345.2 1404 1579 1385 1353  
3-Jul 3 64 17.9 12.9 712.8 64.2 23.2 1283.1   1432.4 1416.5 1547.2 1431.5 1583.9 1429.7 1367.6 1435 1604 1411 1377  
4-Jul 4 65 17.3 12.3 725.1 63.1 22.1 1305.2   1456.9 1439.8 1570.7 1461.4 1607.6 1452.5 1390.1 1462 1628 1438 1400  
5-Jul 5 66 18.9 13.9 739.0 66.0 25.0 1330.2   1480.9 1463.2 1594.8 1483.0 1633.2 1476.0 1415.2 1487 1652 1464 1424  
6-Jul 6 67 20.9 15.9 754.9 69.6 28.6 1358.9   1504.1 1485.1 1618.0 1501.1 1659.3 1497.1 1440.3 1513 1676 1487 1448  
7-Jul 7 68 20.7 15.7 770.6 69.3 28.3 1387.1   1526.7 1508.7 1640.7 1518.9 1681.0 1518.3 1463.0 1537 1698 1512 1471  
8-Jul 8 69 18.0 13.0 783.6 64.4 23.4 1410.5   1550.1 1533.2 1662.3 1548.6 1700.5 1540.4 1484.7 1561 1719 1536 1495  
9-Jul 9 70 18.3 13.3 796.9 64.9 23.9 1434.5   1573.3 1557.4 1684.7 1575.7 1721.0 1563.3 1505.3 1586 1739 1562 1519  
10-Jul 10 71 19.0 14.0 810.9 66.2 25.2 1459.7   1597.0   1579.5 1706.5 1603.8 1742.9 1587.2 1528.1 1609 1760 1590 1542      
11-Jul 11 72 18.8 13.8 824.7 65.8 24.8 1484.5   1620.6 1602.5 1728.0 1629.7 1763.7 1612.2 1551.3 1632 1780 1619 1566  
12-Jul 12 73 19.7 14.7 839.4 67.5 26.5 1511.0   1644.0 1625.8 1749.5 1653.3 1785.1 1639.4 1573.9 1654 1801 1646 1590  
13-Jul 13 74 21.6 16.6 856.0 70.9 29.9 1540.8   1667.8 1649.1 1772.3 1677.4 1806.1 1665.7 1598.3 1676 1823 1672 1613  
14-Jul 14 75 20.6 15.6 871.6 69.1 28.1 1568.9   1691.4 1672.5 1794.9 1702.5 1828.2 1689.7 1623.9 1699 1846 1698 1637  
15-Jul 15 76 18.6 13.6 885.2 65.5 24.5 1593.4   1714.7 1695.1 1816.3 1726.4 1851.0 1712.5 1647.5 1722 1869 1722 1660  
16-Jul 16 77 17.3 12.3 897.5 63.1 22.1 1615.5   1738.3 1716.4 1837.7 1749.5 1874.5 1734.4 1671.3 1746 1895 1747 1684  
17-Jul 17 78 18.4 13.4 910.9 65.1 24.1 1639.7   1761.8 1737.8 1858.6 1774.8 1898.1 1757.3 1694.5 1770 1921 1773 1708  
18-Jul 18 79 18.7 13.7 924.6 65.7 24.7 1664.3   1785.2 1759.6 1878.9 1801.8 1920.2 1780.7 1716.5 1793 1945 1799 1731  
19-Jul 19 80 17.3 12.3 936.9 63.1 22.1 1686.5   1808.7 1781.4 1900.0 1827.5 1942.3 1803.6 1738.3 1815 1969 1824 1755  
20-Jul 20 81 17.4 12.4 949.3 63.3 22.3 1708.8   1832.8 1804.0 1922.7 1851.9 1964.8 1827.3 1762.2 1838 1994 1850 1779  
21-Jul 21 82 18.0 13.0 962.3 64.4 23.4 1732.2   1856.6 1826.5 1946.6 1875.5 1987.8 1849.1 1788.0 1861 2018 1875 1802  
22-Jul 22 83 18.0 13.0 975.3 64.3 23.3 1755.5   1880.0   1847.6 1972.1 1899.5 2010.1 1869.9 1812.6 1885 2042 1900 1826      
23-Jul 23 84 18.0 13.0 988.2 64.3 23.3 1778.8   1903.6 1869.9 1998.4 1923.9 2032.2 1892.2 1836.0 1910 2064 1926 1850  
24-Jul 24 85 18.0 13.0 1001.2 64.3 23.3 1802.2   1926.6 1891.7 2021.9 1949.5 2053.5 1914.9 1857.1 1936 2087 1950 1873  
25-Jul 25 86 18.0 13.0 1014.2 64.3 23.3 1825.5   1949.5 1913.3 2044.5 1976.4 2075.5 1937.9 1877.6 1960 2109 1972 1897  
26-Jul 26 87 18.0 13.0 1027.1 64.3 23.3 1848.8   1972.1 1935.1 2067.3 2001.5 2097.1 1959.5 1898.5 1984 2132 1994 1921  
27-Jul 27 88 18.0 13.0 1040.1 64.3 23.3 1872.1   1994.2 1956.0 2088.5 2025.2 2119.2 1980.8 1919.9 2006 2153 2016 1944  
28-Jul 28 89 18.0 13.0 1053.0 64.3 23.3 1895.4   2015.9 1975.9 2109.4 2048.6 2140.5 2001.9 1941.5 2029 2174 2037 1968  
29-Jul 29 90 18.0 13.0 1066.0 64.3 23.3 1918.8   2036.9 1995.6 2131.8 2063.9 2162.4 2021.1 1963.0 2051 2195 2058 1992  
30-Jul 30 91 18.0 13.0 1078.9 64.3 23.3 1942.1   2057.3 2013.2 2155.1 2079.0 2184.0 2039.6 1984.2 2074 2217 2080 2015  
31-Jul 31 92 18.0 13.0 1091.9 64.3 23.3 1965.4   2078.5 2033.3 2178.9 2094.0 2206.4 2056.9 2006.3 2097 2240 2102 2039  
1-Aug 1 93 18.0 13.0 1104.9 64.3 23.3 1988.7   2099.7 2053.4 2200.9 2109.7 2229.2 2073.9 2029.4 2120 2262 2124 2063  
2-Aug 2 94 18.0 13.0 1117.8 64.3 23.3 2012.1   2121.4 2073.6 2221.8 2133.2 2252.3 2092.1 2051.0 2144 2284 2146 2086  
3-Aug 3 95 18.0 13.0 1130.8 64.3 23.3 2035.4   2142.9 2094.5 2241.2 2156.0 2275.5 2110.6 2073.4 2168 2304 2169 2110  
4-Aug 4 96 18.0 13.0 1143.7 64.3 23.3 2058.7   2164.5 2115.5 2261.0 2177.5 2298.3 2129.9 2095.8 2191 2325 2191 2134  
5-Aug 5 97 18.0 13.0 1156.7 64.3 23.3 2082.0   2186.2 2137.0 2282.5 2197.8 2321.2 2149.5 2118.1 2215 2346 2212 2157  
6-Aug 6 98 18.0 13.0 1169.6 64.3 23.3 2105.4   2208.3 2157.7 2305.2 2218.3 2344.2 2169.7 2140.5 2240 2368 2232 2181  
7-Aug 7 99 18.0 13.0 1182.6 64.3 23.3 2128.7   2229.8 2176.6 2327.3 2240.0 2365.8 2189.4 2163.9 2263 2388 2253 2205  
8-Aug 8 100 18.0 13.0 1195.6 64.3 23.3 2152.0   2250.8 2194.0 2349.0   2386.4 2207.4 2186.6 2285 2409 2275 2228  
9-Aug 9 101 18.0 13.0 1208.5 64.3 23.3 2175.3   2271.8 2210.9 2372.0   2405.6 2225.0 2209.7 2308 2431 2295 2252  
10-Aug 10 102 18.0 13.0 1221.5 64.3 23.3 2198.6   2293.0 2228.2 2394.4   2425.2 2243.9 2231.8 2332 2454 2316 2275  
11-Aug 11 103 18.0 13.0 1234.4 64.3 23.3 2222.0   2313.9 2244.8 2413.9   2445.2 2263.0 2253.7 2354 2477 2338 2299  
12-Aug 12 104 18.0 13.0 1247.4 64.3 23.3 2245.3   2334.8 2262.1 2433.8   2465.2 2283.2 2276.1 2377 2499 2358 2323  
13-Aug 13 105 18.0 13.0 1260.3 64.3 23.3 2268.6   2355.5 2279.0 2453.5   2484.8 2302.8 2296.9 2400 2521 2378 2346  
14-Aug 14 106 18.0 13.0 1273.3 64.3 23.3 2291.9   2376.1 2296.6 2473.1   2503.9 2321.8 2316.6 2423 2544 2398 2370  
15-Aug 15 107 18.0 13.0 1286.3 64.3 23.3 2315.3   2396.6 2315.2 2492.8   2522.6 2340.2 2335.7 2446 2566 2417 2394  
16-Aug 16 108 18.0 13.0 1299.2 64.3 23.3 2338.6   2417.3 2335.0 2514.1   2541.5 2358.4 2352.8 2470 2588 2437 2417  
17-Aug 17 109 18.0 13.0 1312.2 64.3 23.3 2361.9   2438.1 2355.3 2535.8   2560.2 2377.2 2369.3 2495 2611 2456 2441  
18-Aug 18 110 18.0 13.0 1325.1 64.3 23.3 2385.2   2458.6 2376.2 2556.3   2578.2 2394.1 2387.0 2518 2634 2475 2465  
19-Aug 19 111 18.0 13.0 1338.1 64.3 23.3 2408.5   2479.9 2398.0 2577.3   2597.5 2412.5 2408.1 2541 2656 2494 2488  
20-Aug 20 112 18.0 13.0 1351.0 64.3 23.3 2431.9   2501.9 2420.1 2597.2   2617.7 2434.3 2431.5 2566 2678 2513 2512  
21-Aug 21 113 18.0 13.0 1364.0 64.3 23.3 2455.2   2524.2 2444.0 2616.8   2636.6 2456.4 2454.3 2592 2701 2533 2536  
22-Aug 22 114 18.0 13.0 1377.0 64.3 23.3 2478.5   2547.0 2468.7 2638.8   2656.0 2480.4 2476.2 2617 2725 2554 2559  
23-Aug 23 115 18.0 13.0 1389.9 64.3 23.3 2501.8   2569.6 2492.3 2660.8   2676.9 2504.8 2499.9 2642 2748 2573 2583  
24-Aug 24 116 18.0 13.0 1402.9 64.3 23.3 2525.2   2591.6 2516.2 2681.0   2696.5 2525.0 2524.6 2667 2773 2591 2607  
25-Aug 25 117 18.0 13.0 1415.8 64.3 23.3 2548.5   2613.4 2540.0 2702.1   2716.3 2543.9 2547.3 2690 2796 2611 2630  
26-Aug 26 118 18.0 13.0 1428.8 64.3 23.3 2571.8   2635.2 2564.8 2724.2   2735.7 2564.5 2567.4 2714 2818 2631 2654  
27-Aug 27 119 18.0 13.0 1441.7 64.3 23.3 2595.1   2657.2 2589.5 2747.3   2755.9 2586.2 2590.2 2739 2839 2648 2678  
28-Aug 28 120 18.0 13.0 1454.7 64.3 23.3 2618.5   2679.5 2615.8 2770.6   2775.2 2608.2 2610.5 2763 2861 2667 2701  
29-Aug 29 121 18.0 13.0 1467.7 64.3 23.3 2641.8     2643.5 2796.1   2794.6 2631.2   2787 2882 2688 2725  
30-Aug 30 122 18.0 13.0 1480.6 64.3 23.3 2665.1     2671.7 2824.1   2814.0 2653.8   2811 2905 2710 2749  
31-Aug 31 123                   2850.8   2833.3 2675.0   2837 2930 2730 2772  
1-Sep 1 124                   2873.3   2851.5 2694.4   2862 2955 2750 2796  
2-Sep 2 125                   2896.9     2714.2   2887 2979 2769 2819  
3-Sep 3 126                   2923.1     2736.8   2914 3004 2787 2843  
4-Sep 4 127                   2944.3     2758.3   2905 3029 2805 2867  
5-Sep 5 128                   2965.5     2779.4   2896 3053 2824 2890