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Black Turfgrass Ataenius Egg Laying (GDD 50)
through Mon, Mar. 2. 2026

 

GDD Total: 3 (Base 50) through Mon, Mar. 2, 2026

  

La Porte, IN

        

Forecast »

“Flashback” to 2025

2/24

2/25

2/26

2/27

2/28

3/1

3/2

3/3

3/4

3/5

3/6

3/7

3/8

Over

1400

Second Generation Egg Laying

1200

Hatch and Development

200

First Generation Egg Laying

150

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2025 & 2026

2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 31° 55° 21 11 1 0 0
02-16 34° 60° 46 26 6 0 0
02-17 41° 55° 72 42 12 0 0
02-18 43° 62° 103 63 23 3 0
02-19 36° 55° 127 77 27 3 0
02-20 27° 49° 143 83 27 3 0
02-21 26° 29° 149 83 27 3 0
02-22 21° 26° 150 83 27 3 0
02-23 15° 26° 150 83 27 3 0
02-24 13° 36° 152 83 27 3 0
02-25 25° 35° 161 83 27 3 0
02-26 19° 39° 168 83 27 3 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 29° 58° 189 95 28 3 0
02-28 28° 48° 205 101 28 3 0
03-01 24° 33° 211 101 28 3 0
03-02 21° 43° 221 101 28 3 0
03-03 29° 43° 235 105 28 3 0
03-04 32° 50° 254 114 28 3 0
03-05 43° 58° 283 132 37 4 0
03-06 43° 67° 316 155 50 9 0
03-07 55° 65° 354 183 68 19 5
03-08 40° 58° 381 200 75 19 5
03-09 44° 62° 412 221 86 22 5
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 25° 34° 8 0 0 0 0
02-16 17° 30° 9 0 0 0 0
02-17 -0° 16° 9 0 0 0 0
02-18 2° 14° 9 0 0 0 0
02-19 7° 17° 9 0 0 0 0
02-20 2° 22° 9 0 0 0 0
02-21 8° 28° 9 0 0 0 0
02-22 10° 32° 9 0 0 0 0
02-23 21° 39° 17 0 0 0 0
02-24 34° 52° 38 11 1 0 0
02-25 33° 52° 58 21 1 0 0
02-26 31° 46° 75 28 1 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 48° 93 36 1 0 0
02-28 29° 58° 115 48 3 0 0
03-01 17° 37° 120 48 3 0 0
03-02 14° 34° 122 48 3 0 0
03-03 25° 42° 134 50 3 0 0
03-04 38° 48° 155 61 4 0 0
03-05 29° 51° 173 69 4 0 0
03-06 28° 37° 184 70 4 0 0
03-07 29° 39° 196 72 4 0 0
03-08 30° 46° 212 78 4 0 0
03-09 31° 56° 234 89 6 0 0
03-10 36° 66° 263 109 15 1 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 37° 54° 286 122 18 1 0
03-12 34° 57° 310 135 22 1 0
03-13 30° 67° 336 152 28 1 0
03-14 45° 78° 376 181 48 12 6
03-15 53° 69° 415 210 67 24 12
03-16 30° 48° 432 217 67 24 12
03-17 24° 51° 447 223 67 24 12
03-18 43° 74° 484 250 83 32 16
03-19 37° 68° 514 270 94 35 16
03-20 30° 38° 526 272 94 35 16
03-21 28° 56° 547 282 94 35 16
03-22 31° 48° 564 290 94 35 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 31° 47° 582 297 94 35 16
03-24 34° 48° 600 306 94 35 16
03-25 26° 46° 614 310 94 35 16
03-26 27° 50° 631 317 94 35 16
03-27 38° 56° 656 331 99 35 16
03-28 47° 77° 695 361 119 46 23
03-29 58° 66° 735 391 139 58 30
03-30 51° 74° 776 421 159 71 37
03-31 32° 48° 794 429 159 71 37
04-01 28° 45° 809 434 159 71 37
04-02 37° 64° 837 453 167 71 37
04-03 43° 64° 869 474 179 75 37
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 37° 52° 891 487 181 75 37
04-05 41° 46° 913 498 183 75 37
04-06 34° 46° 931 506 183 75 37
04-07 31° 43° 945 511 183 75 37
04-08 27° 39° 956 512 183 75 37
04-09 30° 41° 969 515 183 75 37
04-10 36° 45° 988 523 183 75 37
04-11 32° 48° 1005 531 183 75 37
04-12 29° 58° 1027 542 184 75 37
04-13 48° 62° 1060 565 197 80 37
04-14 52° 64° 1096 592 213 88 40
04-15 39° 53° 1120 605 217 88 40
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 32° 45° 1136 612 217 88 40
04-17 34° 66° 1164 630 225 88 40
04-18 58° 80° 1212 667 252 107 54
04-19 44° 70° 1247 692 268 114 57
04-20 45° 64° 1280 715 281 119 57
04-21 52° 60° 1314 740 295 125 58
04-22 39° 72° 1347 763 308 131 58
04-23 52° 77° 1390 795 331 145 68
04-24 51° 80° 1433 829 354 161 78
04-25 43° 68° 1467 852 368 166 79
04-26 39° 49° 1489 864 370 166 79
04-27 32° 69° 1517 883 378 166 79
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 50° 81° 1561 916 402 182 89
04-29 51° 79° 1604 949 425 197 99
04-30 42° 65° 1635 971 436 200 99
05-01 52° 71° 1674 1000 455 212 106
05-02 46° 60° 1705 1021 466 215 106
05-03 43° 58° 1734 1039 475 215 106
05-04 44° 50° 1759 1054 480 215 106
05-05 48° 62° 1791 1077 492 220 106
05-06 45° 73° 1828 1104 509 229 110
05-07 48° 75° 1868 1134 529 240 116
05-08 45° 63° 1900 1156 541 244 116
05-09 36° 60° 1926 1171 547 244 116
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 39° 73° 1960 1195 561 250 117
05-11 43° 76° 1997 1222 578 259 121
05-12 51° 83° 2041 1257 602 276 133
05-13 60° 76° 2088 1293 628 294 146
05-14 62° 76° 2135 1330 655 313 160
05-15 64° 90° 2190 1376 691 341 183
05-16 62° 86° 2242 1417 723 364 201
05-17 55° 68° 2281 1447 742 376 208
05-18 48° 62° 2314 1470 755 381 208
05-19 44° 62° 2345 1491 766 384 208
05-20 47° 58° 2376 1512 777 387 208
05-21 48° 56° 2406 1531 787 388 208
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 44° 53° 2432 1548 793 388 208
05-23 37° 57° 2457 1563 798 388 208
05-24 39° 65° 2487 1583 808 390 208
05-25 52° 65° 2524 1609 825 399 212
05-26 43° 70° 2558 1634 839 405 213
05-27 54° 71° 2599 1664 860 418 221
05-28 53° 63° 2635 1690 876 426 224
05-29 51° 68° 2673 1718 894 436 229
05-30 51° 73° 2713 1748 914 448 236
05-31 45° 61° 2744 1770 925 451 236
06-01 40° 64° 2774 1790 935 453 236
06-02 40° 82° 2813 1819 954 465 242
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 63° 88° 2867 1862 988 490 263
06-04 58° 78° 2913 1899 1014 508 276
06-05 57° 66° 2953 1928 1033 520 282
06-06 61° 71° 2997 1962 1058 536 294
06-07 55° 78° 3041 1997 1082 552 305
06-08 61° 81° 3090 2036 1111 573 321
06-09 54° 76° 3133 2069 1134 589 331
06-10 52° 77° 3176 2102 1157 603 341
06-11 60° 88° 3228 2144 1189 627 360
06-12 64° 84° 3280 2186 1221 652 379
06-13 66° 74° 3328 2224 1249 672 394
06-14 62° 74° 3375 2260 1276 690 408
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 59° 81° 3423 2298 1304 710 422
06-16 61° 85° 3474 2339 1335 733 441
06-17 69° 90° 3531 2387 1372 762 465
06-18 68° 85° 3586 2431 1406 789 486
06-19 64° 80° 3636 2471 1436 811 503
06-20 65° 85° 3689 2514 1469 836 523
06-21 73° 92° 3749 2565 1510 869 551
06-22 78° 93° 3813 2618 1554 904 582
06-23 76° 94° 3876 2671 1597 939 612
06-24 76° 94° 3939 2725 1640 974 642
06-25 71° 87° 3996 2772 1677 1003 666
06-26 74° 91° 4057 2822 1718 1036 694
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 74° 88° 4116 2871 1757 1067 719
06-28 68° 82° 4168 2914 1789 1092 739
06-29 68° 90° 4226 2961 1826 1121 763
06-30 73° 86° 4283 3009 1864 1150 788
07-01 69° 81° 4336 3052 1897 1175 808
07-02 64° 87° 4389 3095 1930 1200 828
07-03 66° 89° 4445 3140 1965 1228 850
07-04 69° 86° 4500 3186 2001 1256 873
07-05 72° 91° 4560 3235 2041 1287 900
07-06 70° 89° 4617 3283 2078 1317 924
07-07 66° 77° 4667 3323 2108 1338 941
07-08 60° 88° 4719 3364 2140 1362 960
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 68° 82° 4772 3408 2173 1387 980
07-10 63° 85° 4824 3450 2205 1411 999
07-11 70° 90° 4882 3497 2243 1441 1024
07-12 74° 86° 4940 3545 2281 1471 1049
07-13 68° 82° 4993 3588 2314 1496 1069
07-14 59° 85° 5043 3628 2344 1518 1086
07-15 62° 91° 5097 3673 2378 1544 1107
07-16 71° 91° 5156 3722 2417 1575 1133
07-17 65° 74° 5203 3759 2444 1595 1147
07-18 60° 79° 5251 3797 2472 1614 1162
07-19 67° 80° 5303 3838 2503 1638 1180
07-20 68° 76° 5353 3878 2534 1660 1198
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 62° 82° 5403 3919 2564 1682 1215
07-22 64° 83° 5454 3960 2595 1705 1233
07-23 66° 90° 5510 4006 2631 1733 1256
07-24 74° 95° 5572 4058 2673 1768 1285
07-25 72° 82° 5627 4103 2708 1794 1307
07-26 71° 79° 5680 4146 2741 1819 1327
07-27 72° 87° 5738 4194 2779 1849 1352
07-28 75° 89° 5798 4243 2819 1881 1379
07-29 70° 91° 5856 4292 2857 1911 1404
07-30 70° 84° 5911 4337 2892 1939 1426
07-31 61° 76° 5958 4373 2919 1957 1440
08-01 58° 75° 6002 4408 2943 1973 1451
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 55° 77° 6046 4442 2967 1989 1462
08-03 55° 78° 6090 4476 2991 2006 1473
08-04 58° 80° 6137 4513 3018 2025 1487
08-05 58° 82° 6186 4551 3046 2045 1502
08-06 60° 84° 6236 4591 3077 2067 1519
08-07 66° 87° 6290 4636 3111 2094 1541
08-08 70° 88° 6348 4683 3149 2123 1566
08-09 69° 90° 6405 4731 3186 2152 1590
08-10 71° 89° 6463 4779 3224 2182 1615
08-11 72° 85° 6520 4826 3261 2211 1639
08-12 71° 89° 6578 4874 3299 2241 1664
08-13 68° 82° 6631 4917 3332 2266 1684
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 59° 82° 6680 4955 3361 2287 1699
08-15 62° 88° 6733 4999 3394 2312 1720
08-16 74° 92° 6794 5050 3435 2346 1748
08-17 71° 82° 6849 5094 3469 2372 1769
08-18 68° 84° 6902 5138 3503 2398 1790
08-19 70° 76° 6954 5179 3535 2421 1808
08-20 65° 72° 7000 5216 3561 2439 1822
08-21 58° 73° 7044 5249 3584 2455 1832
08-22 56° 78° 7088 5284 3609 2472 1844
08-23 63° 83° 7139 5325 3640 2495 1862
08-24 58° 72° 7183 5358 3664 2510 1872
08-25 56° 67° 7222 5388 3683 2521 1879
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 54° 70° 7262 5418 3703 2533 1886
08-27 48° 74° 7301 5447 3722 2544 1892
08-28 59° 74° 7346 5481 3747 2561 1904
08-29 48° 68° 7382 5507 3763 2569 1907
08-30 53° 73° 7423 5539 3784 2582 1915
08-31 49° 74° 7463 5568 3804 2594 1921
09-01 51° 76° 7504 5600 3825 2607 1930
09-02 53° 78° 7548 5633 3848 2623 1940
09-03 56° 75° 7591 5666 3872 2638 1951
09-04 54° 65° 7628 5693 3889 2647 1955
09-05 53° 67° 7666 5722 3907 2657 1960
09-06 46° 64° 7699 5745 3920 2662 1960
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 46° 64° 7732 5768 3933 2667 1960
09-08 41° 69° 7765 5790 3946 2672 1960
09-09 44° 75° 7802 5818 3963 2681 1964
09-10 56° 80° 7848 5853 3988 2699 1977
09-11 54° 80° 7893 5888 4014 2716 1989
09-12 52° 82° 7938 5924 4039 2733 2001
09-13 60° 72° 7982 5958 4063 2749 2012
09-14 59° 84° 8032 5997 4093 2771 2029
09-15 59° 83° 8081 6036 4122 2792 2045
09-16 56° 80° 8127 6072 4148 2810 2058
09-17 56° 82° 8174 6109 4175 2829 2072
09-18 55° 84° 8221 6147 4202 2849 2086
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 59° 88° 8273 6189 4234 2872 2105
09-20 62° 80° 8322 6228 4263 2893 2121
09-21 64° 82° 8373 6268 4294 2916 2139
09-22 65° 78° 8422 6308 4323 2937 2155
09-23 63° 73° 8468 6343 4349 2955 2168
09-24 63° 70° 8512 6378 4373 2971 2179
09-25 58° 71° 8554 6410 4395 2986 2188
09-26 53° 79° 8598 6444 4419 3002 2199
09-27 57° 83° 8647 6482 4448 3022 2215
09-28 57° 80° 8694 6519 4474 3041 2229
09-29 56° 85° 8742 6558 4503 3061 2244
09-30 57° 81° 8789 6595 4530 3080 2258
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55

 

Latest Updates

February 16th, 2026Welcome to the 2026 GDD Tracking Season

Although Punxsutawney Phil saw his shadow predicting six more weeks of winter, GDDTracker will start counting on February 15. Spring is when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. As spring turns to summer, there are several models that may be helpful throughout the season including the early season dollar spot DMI timer and the Smith-Kerns dollar spot prediction model. To learn about all the available models, click on the "About" tab at the top of the screen. Thanks for your continued support and use of GDDTracker and best wishes for a successful 2026!


 

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

 

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