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Bluegrass Billbug Activity - OSU (GDD 50)
through Thu, Apr. 17. 2025

 

GDD Total: 0 (Base 50) through Thu, Apr. 17, 2025

  

La Porte, IN

        

Forecast »

“Flashback” to 2024

4/11

4/12

4/13

4/14

4/15

4/16

4/18

4/19

4/20

4/21

4/22

4/23

Visual turfgrass damage

1330

Larvae emergence - contacts

926

Larvae hatch; stem tunneling

650

Egg Lay - systemics

560

First Emergence

280

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

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
02-29 n/a n/a n/a n/a n/a n/a n/a
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
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 36° 66° 263 109 15 1 0
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
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 48° 564 290 94 35 16
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
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 43° 64° 869 474 179 75 37
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
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 39° 53° 1120 605 217 88 40
04-16 32° 45° 1136 612 217 88 40
04-17 34° 66° 0 0 0 0 0
04-18 54° 77° 1206 662 247 104 51
04-19 46° 53° 1234 679 255 104 51
04-20 42° 58° 1262 697 263 104 51
04-21 43° 58° 1290 716 271 104 51
04-22 41° 65° 1321 737 282 107 51
04-23 47° 68° 1357 762 298 115 54
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 41° 14 4 0 0 0
02-16 23° 31° 20 4 0 0 0
02-17 13° 25° 20 4 0 0 0
02-18 16° 42° 27 4 0 0 0
02-19 21° 47° 39 7 0 0 0
02-20 26° 55° 58 15 0 0 0
02-21 41° 64° 88 35 10 2 0
02-22 38° 52° 111 48 13 2 0
02-23 30° 44° 126 53 13 2 0
02-24 19° 31° 129 53 13 2 0
02-25 27° 57° 149 63 13 2 0
02-26 35° 68° 178 83 22 4 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 55° 69° 218 113 42 16 7
02-28 21° 62° 238 122 42 16 7
02-29 21° 40° 246 122 42 16 7
03-01 28° 44° 260 126 42 16 7
03-02 38° 56° 285 141 47 16 7
03-03 41° 69° 319 165 61 21 7
03-04 52° 72° 359 195 81 33 14
03-05 39° 64° 389 215 91 35 14
03-06 38° 50° 411 227 93 35 14
03-07 33° 51° 431 237 93 35 14
03-08 43° 54° 457 253 99 35 14
03-09 33° 41° 472 258 99 35 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 29° 39° 484 260 99 35 14
03-11 26° 63° 507 273 102 35 14
03-12 42° 68° 540 296 115 40 15
03-13 46° 71° 577 323 132 49 19
03-14 43° 67° 610 346 145 54 19
03-15 35° 44° 628 354 145 54 19
03-16 34° 59° 652 368 149 54 19
03-17 31° 40° 665 371 149 54 19
03-18 28° 32° 673 371 149 54 19
03-19 27° 55° 692 380 149 54 19
03-20 27° 41° 704 383 149 54 19
03-21 21° 38° 712 383 149 54 19
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 48° 729 390 149 54 19
03-23 27° 37° 739 390 149 54 19
03-24 27° 47° 754 395 149 54 19
03-25 39° 68° 786 417 161 58 19
03-26 38° 60° 812 433 167 58 19
03-27 31° 43° 827 438 167 58 19
03-28 26° 50° 843 444 167 58 19
03-29 30° 56° 864 455 168 58 19
03-30 40° 62° 893 474 177 58 19
03-31 37° 53° 915 486 179 58 19
04-01 44° 51° 941 502 185 58 19
04-02 37° 59° 967 518 191 58 19
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 37° 981 522 191 58 19
04-04 36° 40° 997 528 191 58 19
04-05 35° 45° 1015 536 191 58 19
04-06 31° 52° 1034 545 191 58 19
04-07 35° 56° 1058 559 195 58 19
04-08 44° 74° 1095 586 212 67 23
04-09 53° 68° 1133 614 230 78 28
04-10 42° 66° 1166 637 242 82 28
04-11 46° 56° 1195 656 252 83 28
04-12 45° 60° 1225 676 262 86 28
04-13 38° 68° 1257 697 273 89 28
04-14 59° 77° 1302 733 299 107 41
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 70° 1341 762 317 117 46
04-16 52° 76° 1383 794 340 131 55
04-17 63° 68° 1426 827 363 147 66
04-18 47° 63° 1459 850 376 152 66
04-19 43° 56° 1486 867 383 152 66
04-20 35° 47° 1505 876 383 152 66
04-21 37° 45° 1524 885 383 152 66
04-22 37° 65° 1554 905 392 153 66
04-23 51° 55° 1585 926 403 156 66
04-24 36° 50° 1606 937 405 156 66
04-25 29° 57° 1627 948 406 156 66
04-26 38° 62° 1655 966 413 156 66
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 59° 77° 1701 1001 439 173 78
04-28 62° 76° 1748 1038 466 192 92
04-29 62° 68° 1791 1072 489 208 103
04-30 47° 74° 1830 1100 508 218 108
05-01 58° 77° 1875 1136 534 236 121
05-02 51° 83° 1920 1171 559 253 133
05-03 52° 66° 1957 1198 576 262 137
05-04 50° 81° 2001 1232 599 278 148
05-05 49° 65° 2036 1257 615 285 150
05-06 46° 74° 2074 1285 632 295 155
05-07 55° 77° 2118 1319 656 311 165
05-08 53° 78° 2161 1352 680 326 176
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 68° 2199 1380 698 336 181
05-10 47° 66° 2234 1405 712 343 182
05-11 48° 62° 2267 1428 725 348 183
05-12 45° 81° 2308 1459 746 361 191
05-13 61° 81° 2357 1498 775 382 207
05-14 59° 68° 2399 1530 797 396 216
05-15 54° 66° 2437 1558 815 406 221
05-16 50° 75° 2477 1588 836 418 228
05-17 60° 78° 2525 1625 863 437 242
05-18 59° 84° 2574 1665 892 459 259
05-19 63° 77° 2622 1703 921 479 274
05-20 60° 89° 2675 1745 953 503 293
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 63° 88° 2728 1789 986 529 314
05-22 64° 79° 2778 1829 1016 551 331
05-23 55° 79° 2823 1864 1041 568 343
05-24 61° 81° 2872 1902 1070 588 358
05-25 57° 69° 2913 1934 1091 602 366
05-26 53° 72° 2953 1964 1112 614 374
05-27 58° 69° 2995 1996 1133 628 383
05-28 55° 72° 3036 2027 1155 641 391
05-29 51° 64° 3072 2053 1171 649 394
05-30 45° 70° 3108 2079 1186 657 397
05-31 49° 78° 3149 2110 1208 670 405
06-01 58° 68° 3190 2141 1229 683 413
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 57° 70° 3232 2173 1250 697 422
06-03 55° 85° 3280 2211 1278 717 437
06-04 67° 86° 3335 2255 1313 743 458
06-05 65° 78° 3384 2295 1343 765 475
06-06 64° 78° 3433 2334 1372 786 491
06-07 58° 76° 3478 2369 1397 803 503
06-08 54° 79° 3523 2404 1421 820 515
06-09 53° 79° 3567 2438 1445 836 526
06-10 52° 62° 3602 2463 1460 843 527
06-11 43° 76° 3639 2490 1478 852 532
06-12 62° 90° 3693 2534 1512 878 553
06-13 71° 90° 3752 2583 1550 909 579
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 85° 3805 2626 1583 934 598
06-15 60° 84° 3854 2665 1613 955 615
06-16 62° 91° 3909 2710 1648 982 637
06-17 76° 93° 3971 2762 1690 1016 666
06-18 75° 88° 4031 2812 1729 1048 693
06-19 75° 93° 4093 2864 1772 1082 722
06-20 71° 89° 4151 2912 1810 1112 747
06-21 68° 92° 4209 2960 1848 1142 772
06-22 74° 91° 4270 3011 1888 1175 799
06-23 65° 82° 4321 3052 1920 1198 818
06-24 61° 82° 4370 3091 1949 1219 834
06-25 69° 83° 4424 3135 1983 1245 855
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 83° 4478 3179 2016 1271 876
06-27 61° 72° 4522 3213 2041 1287 887
06-28 61° 76° 4569 3249 2067 1305 900
06-29 72° 89° 4627 3298 2105 1336 926
06-30 57° 77° 4672 3333 2130 1353 938
07-01 48° 75° 4711 3362 2149 1364 944
07-02 60° 82° 4760 3401 2178 1385 960
07-03 73° 86° 4818 3449 2216 1415 984
07-04 68° 80° 4869 3490 2248 1438 1003
07-05 62° 82° 4919 3530 2278 1460 1020
07-06 62° 79° 4968 3569 2306 1481 1036
07-07 60° 87° 5020 3611 2338 1505 1055
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 68° 85° 5075 3655 2373 1531 1076
07-09 69° 77° 5125 3696 2404 1554 1094
07-10 65° 78° 5175 3736 2434 1576 1111
07-11 61° 79° 5223 3774 2462 1596 1126
07-12 64° 83° 5275 3816 2493 1620 1144
07-13 64° 88° 5329 3860 2527 1646 1165
07-14 67° 83° 5382 3903 2560 1671 1185
07-15 68° 87° 5437 3948 2596 1698 1208
07-16 67° 83° 5490 3991 2629 1723 1228
07-17 64° 78° 5539 4030 2658 1744 1244
07-18 58° 71° 5582 4063 2680 1759 1254
07-19 52° 76° 5624 4095 2702 1773 1263
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 56° 78° 5669 4130 2728 1790 1275
07-21 59° 80° 5717 4168 2755 1810 1290
07-22 61° 80° 5765 4206 2784 1830 1305
07-23 61° 83° 5816 4247 2814 1853 1322
07-24 64° 76° 5864 4285 2842 1873 1338
07-25 58° 77° 5910 4321 2868 1891 1350
07-26 52° 80° 5953 4354 2892 1906 1361
07-27 57° 82° 6001 4392 2919 1926 1376
07-28 62° 80° 6050 4431 2948 1947 1392
07-29 70° 84° 6105 4476 2983 1974 1414
07-30 67° 87° 6160 4521 3019 2001 1436
07-31 70° 89° 6218 4569 3056 2031 1460
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 70° 84° 6273 4614 3091 2058 1483
08-02 69° 81° 6326 4657 3125 2083 1503
08-03 66° 89° 6382 4703 3160 2111 1525
08-04 66° 89° 6437 4748 3195 2138 1548
08-05 70° 87° 6493 4794 3232 2166 1571
08-06 69° 80° 6546 4836 3264 2190 1590
08-07 61° 79° 6594 4875 3292 2211 1606
08-08 57° 81° 6641 4912 3320 2230 1620
08-09 64° 72° 6687 4948 3346 2248 1633
08-10 54° 74° 6729 4980 3368 2262 1642
08-11 54° 76° 6772 5013 3391 2277 1652
08-12 53° 77° 6815 5046 3414 2292 1662
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 53° 82° 6861 5082 3439 2310 1674
08-14 56° 84° 6909 5120 3467 2330 1690
08-15 65° 75° 6957 5158 3496 2350 1705
08-16 67° 85° 7011 5202 3530 2376 1726
08-17 67° 76° 7060 5241 3559 2397 1742
08-18 66° 73° 7108 5279 3586 2417 1757
08-19 62° 73° 7154 5315 3612 2435 1769
08-20 51° 70° 7192 5343 3630 2445 1775
08-21 48° 73° 7230 5371 3649 2455 1780
08-22 49° 77° 7272 5403 3670 2469 1788
08-23 51° 80° 7315 5436 3694 2484 1799
08-24 56° 88° 7365 5476 3724 2506 1816
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 67° 90° 7422 5523 3761 2535 1840
08-26 73° 93° 7483 5574 3802 2568 1868
08-27 72° 96° 7545 5626 3844 2602 1897
08-28 70° 84° 7600 5671 3879 2629 1919
08-29 68° 87° 7655 5716 3914 2656 1941
08-30 72° 89° 7714 5765 3952 2687 1967
08-31 67° 81° 7766 5807 3985 2711 1986
09-01 61° 76° 7813 5844 4011 2730 1999
09-02 49° 73° 7852 5873 4030 2741 2006
09-03 49° 76° 7892 5903 4051 2753 2013
09-04 50° 82° 7936 5937 4075 2769 2024
09-05 59° 86° 7987 5978 4105 2792 2041
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 57° 75° 8031 6012 4129 2808 2053
09-07 51° 63° 8066 6036 4144 2814 2054
09-08 43° 69° 8100 6061 4158 2821 2056
09-09 49° 79° 8142 6093 4181 2835 2065
09-10 51° 81° 8187 6127 4205 2851 2076
09-11 52° 86° 8234 6165 4232 2871 2091
09-12 57° 88° 8284 6205 4263 2893 2108
09-13 60° 85° 8335 6246 4293 2916 2125
09-14 61° 88° 8387 6288 4326 2940 2145
09-15 60° 89° 8440 6331 4358 2965 2165
09-16 57° 88° 8491 6371 4389 2987 2182
09-17 54° 84° 8537 6408 4416 3006 2196
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 53° 86° 8585 6446 4443 3026 2210
09-19 55° 88° 8634 6485 4472 3047 2227
09-20 62° 84° 8685 6526 4504 3070 2245
09-21 58° 91° 8737 6568 4536 3094 2264
09-22 64° 69° 8782 6603 4561 3111 2276
09-23 61° 67° 8824 6635 4582 3125 2285
09-24 62° 70° 8868 6669 4607 3141 2296
09-25 57° 73° 8911 6702 4630 3156 2306
09-26 51° 76° 8953 6734 4651 3170 2314
09-27 60° 72° 8997 6768 4676 3186 2326
09-28 61° 70° 9040 6801 4699 3201 2336
09-29 63° 74° 9087 6838 4725 3220 2350
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 58° 75° 9131 6872 4750 3236 2361

 

Latest Updates

February 15th, 2025Welcome to the 2025 GDD Tracking Season

Although winter seems very much entrenched in the Great Lakes region with snow and frigid temperatures in the forecast, GDDTracker starts 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. Beyond the spring models, 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 2025!
 

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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