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Bluegrass Billbug Activity - OSU (GDD 50)
through Tue, Mar. 31. 2026

 

GDD Total: 161 (Base 50) through Tue, Mar. 31, 2026

  

Muncie, IN

        

Forecast »

“Flashback” to 2025

3/28

3/29

3/30

3/31

4/1

4/2

4/3

4/4

4/5

4/6

4/7

4/8

4/9

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 2025 & 2026

2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 38° 54° 25 15 5 0 0
02-16 33° 58° 48 28 8 0 0
02-17 36° 58° 73 43 13 0 0
02-18 47° 70° 109 69 29 8 3
02-19 46° 62° 141 91 41 12 3
02-20 30° 52° 161 101 41 12 3
02-21 25° 33° 168 101 41 12 3
02-22 20° 27° 169 101 41 12 3
02-23 17° 27° 169 101 41 12 3
02-24 11° 39° 172 101 41 12 3
02-25 32° 48° 190 109 41 12 3
02-26 25° 46° 204 112 41 12 3
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 61° 230 128 47 12 3
02-28 36° 56° 254 142 51 12 3
03-01 27° 37° 264 142 51 12 3
03-02 23° 38° 273 142 51 12 3
03-03 34° 43° 289 149 51 12 3
03-04 39° 53° 313 163 55 12 3
03-05 51° 62° 348 187 70 19 5
03-06 57° 76° 392 222 94 35 16
03-07 44° 65° 424 244 106 39 16
03-08 37° 59° 451 260 113 39 16
03-09 44° 71° 486 286 128 47 18
03-10 63° 72° 532 321 154 64 31
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 35° 70° 562 342 164 67 31
03-12 30° 46° 578 348 164 67 31
03-13 39° 56° 604 363 170 67 31
03-14 30° 46° 620 369 170 67 31
03-15 40° 73° 654 394 184 73 33
03-16 20° 61° 673 403 184 73 33
03-17 15° 25° 673 403 184 73 33
03-18 22° 43° 684 403 184 73 33
03-19 36° 68° 713 423 194 75 33
03-20 47° 77° 754 453 214 87 40
03-21 41° 69° 787 476 227 92 40
03-22 47° 83° 830 510 251 108 51
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 31° 43° 845 514 251 108 51
03-24 27° 52° 863 522 251 108 51
03-25 38° 68° 894 543 262 111 51
03-26 52° 82° 939 578 287 128 63
03-27 33° 51° 958 588 287 128 63
03-28 28° 46° 973 593 287 128 63
03-29 36° 64° 1001 611 295 128 63
03-30 53° 75° 1044 643 317 142 72
03-31 62° 76° 1091 680 344 161 86
04-01 38° 70° 1123 702 356 165 86
04-02 38° 77° 1159 728 372 173 89
04-03 65° 78° 1208 767 401 194 105
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 63° 71° 1253 802 426 211 117
04-05 38° 50° 1275 814 428 211 117
04-06 36° 54° 1298 827 431 211 117
04-07 28° 47° 1313 833 431 211 117
04-08 33° 65° 1340 850 438 211 117
04-09 51° 70° 1379 878 457 222 122
04-10 52° 74° 1420 909 478 235 131
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 30° 40° 13 3 0 0 0
02-16 21° 35° 19 3 0 0 0
02-17 6° 18° 19 3 0 0 0
02-18 4° 15° 19 3 0 0 0
02-19 11° 19° 19 3 0 0 0
02-20 5° 19° 19 3 0 0 0
02-21 16° 29° 19 3 0 0 0
02-22 14° 32° 20 3 0 0 0
02-23 20° 43° 30 3 0 0 0
02-24 33° 53° 51 14 1 0 0
02-25 35° 57° 75 29 6 0 0
02-26 30° 53° 94 38 6 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 53° 117 50 8 0 0
02-28 31° 61° 141 64 12 0 0
03-01 20° 44° 151 64 12 0 0
03-02 14° 33° 152 64 12 0 0
03-03 24° 40° 163 65 12 0 0
03-04 40° 63° 192 84 21 1 0
03-05 32° 54° 213 96 23 1 0
03-06 30° 38° 226 98 23 1 0
03-07 29° 40° 239 101 23 1 0
03-08 31° 46° 255 108 23 1 0
03-09 33° 58° 279 121 26 1 0
03-10 35° 66° 307 139 35 2 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 47° 69° 343 166 51 10 3
03-12 36° 66° 373 185 60 11 3
03-13 34° 72° 404 206 71 14 3
03-14 47° 76° 443 235 90 26 10
03-15 55° 70° 484 266 111 38 17
03-16 33° 57° 507 279 114 38 17
03-17 28° 48° 523 285 114 38 17
03-18 41° 71° 557 309 128 44 18
03-19 52° 66° 594 336 145 53 22
03-20 31° 52° 613 345 145 53 22
03-21 26° 55° 632 354 145 53 22
03-22 35° 49° 652 364 145 53 22
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 31° 46° 668 371 145 53 22
03-24 36° 51° 690 382 147 53 22
03-25 34° 49° 709 392 147 53 22
03-26 28° 52° 727 399 147 53 22
03-27 36° 57° 752 414 151 53 22
03-28 48° 79° 793 445 172 66 30
03-29 62° 70° 837 479 196 83 41
03-30 56° 72° 879 511 219 97 51
03-31 35° 57° 903 525 223 97 51
04-01 28° 49° 920 532 223 97 51
04-02 42° 80° 959 561 241 107 56
04-03 50° 65° 994 586 257 115 59
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 45° 57° 1023 606 266 116 59
04-05 44° 58° 1053 625 275 118 59
04-06 36° 45° 1071 633 275 118 59
04-07 31° 54° 1091 644 276 118 59
04-08 23° 42° 1102 644 276 118 59
04-09 30° 44° 1117 649 276 118 59
04-10 37° 52° 1140 662 278 118 59
04-11 37° 48° 1160 672 279 118 59
04-12 30° 58° 1182 684 281 118 59
04-13 42° 62° 1212 704 291 120 59
04-14 55° 71° 1253 736 312 133 67
04-15 45° 53° 1280 752 319 133 67
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 33° 55° 1302 764 321 133 67
04-17 36° 67° 1331 784 330 134 67
04-18 58° 81° 1379 821 358 153 81
04-19 52° 72° 1419 851 378 166 89
04-20 47° 71° 1456 878 395 175 93
04-21 53° 66° 1494 906 412 184 97
04-22 42° 71° 1528 930 427 191 99
04-23 50° 78° 1570 962 449 205 108
04-24 50° 83° 1614 997 473 221 119
04-25 58° 70° 1656 1029 495 235 128
04-26 44° 62° 1687 1050 506 238 128
04-27 40° 66° 1719 1071 518 241 128
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 50° 79° 1762 1104 540 256 138
04-29 60° 77° 1809 1141 567 275 152
04-30 45° 71° 1845 1167 584 283 155
05-01 62° 74° 1890 1203 609 301 168
05-02 57° 73° 1934 1236 632 316 178
05-03 50° 57° 1965 1257 644 320 178
05-04 44° 51° 1991 1273 650 320 178
05-05 49° 62° 2024 1296 663 325 178
05-06 51° 71° 2063 1326 682 336 184
05-07 50° 76° 2104 1356 703 349 192
05-08 51° 66° 2141 1383 720 358 196
05-09 39° 66° 2171 1404 730 360 196
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 40° 78° 2209 1431 747 370 200
05-11 50° 78° 2251 1463 770 384 209
05-12 54° 76° 2294 1496 793 399 219
05-13 62° 74° 2340 1532 819 417 232
05-14 59° 75° 2385 1567 843 434 244
05-15 63° 85° 2436 1609 875 457 263
05-16 62° 84° 2487 1649 906 480 281
05-17 59° 70° 2530 1682 929 495 290
05-18 53° 72° 2571 1713 949 508 298
05-19 48° 74° 2610 1742 969 519 304
05-20 50° 60° 2643 1765 982 524 305
05-21 52° 61° 2678 1790 996 531 306
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 46° 56° 2707 1809 1005 532 306
05-23 40° 64° 2737 1829 1015 534 306
05-24 41° 68° 2769 1851 1028 538 306
05-25 49° 62° 2803 1875 1042 544 307
05-26 44° 70° 2838 1901 1057 552 309
05-27 57° 66° 2878 1930 1077 563 316
05-28 56° 64° 2916 1958 1095 573 321
05-29 53° 70° 2956 1988 1114 585 328
05-30 57° 74° 2999 2021 1138 600 338
05-31 54° 72° 3040 2052 1159 613 346
06-01 40° 72° 3075 2077 1173 620 348
06-02 43° 81° 3115 2107 1194 632 355
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 60° 86° 3166 2148 1225 655 373
06-04 70° 85° 3221 2194 1260 682 395
06-05 67° 75° 3271 2233 1290 704 412
06-06 63° 77° 3319 2271 1318 724 427
06-07 63° 80° 3368 2311 1347 746 443
06-08 62° 77° 3416 2348 1375 765 458
06-09 60° 77° 3463 2385 1401 784 471
06-10 55° 76° 3506 2418 1425 799 482
06-11 57° 85° 3555 2457 1454 820 498
06-12 63° 86° 3608 2500 1487 845 518
06-13 68° 78° 3659 2541 1518 868 536
06-14 65° 71° 3705 2577 1544 886 549
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 63° 78° 3754 2616 1573 907 565
06-16 63° 81° 3804 2656 1603 929 582
06-17 69° 83° 3858 2700 1637 955 603
06-18 67° 87° 3913 2745 1672 982 625
06-19 67° 78° 3964 2786 1702 1005 642
06-20 64° 83° 4015 2828 1734 1028 661
06-21 70° 91° 4074 2876 1772 1059 686
06-22 76° 92° 4135 2927 1814 1092 715
06-23 74° 92° 4196 2979 1855 1126 743
06-24 75° 91° 4258 3030 1896 1159 771
06-25 74° 89° 4317 3079 1936 1190 798
06-26 74° 89° 4376 3128 1975 1221 824
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 74° 90° 4436 3178 2015 1253 851
06-28 73° 87° 4494 3226 2053 1283 876
06-29 69° 84° 4548 3270 2087 1309 897
06-30 72° 85° 4605 3317 2124 1338 921
07-01 71° 84° 4661 3363 2160 1366 944
07-02 60° 85° 4711 3403 2190 1388 961
07-03 66° 88° 4766 3448 2225 1415 983
07-04 65° 89° 4821 3493 2260 1442 1005
07-05 68° 90° 4878 3540 2296 1471 1029
07-06 72° 89° 4936 3588 2335 1501 1054
07-07 70° 79° 4988 3631 2367 1526 1073
07-08 63° 85° 5041 3673 2399 1550 1092
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 69° 84° 5095 3717 2434 1576 1114
07-10 66° 87° 5150 3762 2469 1603 1136
07-11 70° 89° 5207 3809 2506 1632 1160
07-12 71° 86° 5264 3856 2543 1661 1184
07-13 70° 86° 5320 3902 2579 1689 1207
07-14 70° 84° 5375 3947 2614 1716 1229
07-15 67° 86° 5430 3992 2648 1743 1250
07-16 73° 85° 5486 4038 2685 1771 1274
07-17 70° 83° 5541 4083 2720 1798 1296
07-18 66° 78° 5591 4123 2750 1820 1313
07-19 65° 81° 5642 4164 2781 1843 1331
07-20 71° 79° 5695 4207 2814 1868 1351
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 68° 80° 5747 4249 2846 1892 1370
07-22 61° 81° 5797 4289 2876 1914 1387
07-23 61° 87° 5849 4331 2908 1938 1406
07-24 72° 91° 5909 4381 2947 1970 1432
07-25 75° 87° 5968 4430 2987 2001 1459
07-26 73° 90° 6027 4479 3026 2032 1485
07-27 75° 88° 6086 4529 3065 2064 1511
07-28 73° 87° 6144 4577 3103 2094 1536
07-29 73° 91° 6204 4626 3143 2125 1563
07-30 69° 89° 6262 4674 3181 2155 1588
07-31 65° 73° 6309 4711 3207 2174 1601
08-01 57° 75° 6352 4745 3231 2189 1612
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 56° 74° 6395 4777 3254 2204 1622
08-03 52° 77° 6438 4810 3277 2219 1632
08-04 60° 79° 6486 4848 3304 2239 1646
08-05 62° 82° 6536 4888 3334 2261 1664
08-06 64° 84° 6587 4929 3366 2284 1682
08-07 65° 85° 6640 4973 3399 2310 1702
08-08 66° 87° 6695 5017 3434 2336 1724
08-09 69° 88° 6751 5064 3470 2364 1747
08-10 68° 88° 6807 5110 3506 2392 1770
08-11 69° 88° 6864 5156 3543 2421 1794
08-12 68° 87° 6919 5202 3578 2448 1816
08-13 69° 84° 6974 5246 3613 2475 1838
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 62° 85° 7026 5288 3644 2499 1856
08-15 63° 89° 7080 5332 3678 2525 1878
08-16 68° 88° 7136 5378 3715 2553 1901
08-17 69° 85° 7191 5423 3750 2580 1923
08-18 67° 86° 7246 5468 3784 2607 1944
08-19 71° 85° 7302 5514 3820 2635 1967
08-20 68° 74° 7350 5553 3849 2655 1983
08-21 66° 74° 7399 5591 3878 2676 1999
08-22 61° 76° 7445 5627 3904 2694 2012
08-23 64° 78° 7494 5666 3933 2715 2028
08-24 57° 74° 7538 5700 3956 2731 2038
08-25 53° 70° 7577 5729 3975 2742 2045
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 49° 71° 7614 5757 3993 2751 2049
08-27 46° 74° 7652 5785 4011 2762 2054
08-28 56° 73° 7695 5817 4034 2776 2064
08-29 46° 73° 7732 5845 4051 2785 2068
08-30 47° 74° 7771 5873 4069 2796 2074
08-31 46° 75° 7809 5901 4088 2806 2079
09-01 47° 79° 7850 5932 4109 2819 2087
09-02 51° 81° 7894 5966 4132 2835 2098
09-03 53° 80° 7938 6000 4157 2851 2109
09-04 52° 68° 7976 6028 4175 2861 2114
09-05 50° 74° 8016 6058 4195 2873 2121
09-06 50° 67° 8053 6085 4211 2882 2124
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 46° 69° 8088 6110 4227 2889 2127
09-08 41° 71° 8122 6134 4240 2895 2128
09-09 44° 76° 8160 6162 4259 2905 2133
09-10 51° 80° 8203 6196 4282 2921 2143
09-11 50° 82° 8247 6230 4306 2936 2154
09-12 51° 83° 8292 6265 4331 2954 2166
09-13 53° 77° 8335 6298 4354 2969 2176
09-14 62° 86° 8387 6340 4386 2992 2195
09-15 56° 87° 8436 6379 4415 3014 2211
09-16 55° 84° 8484 6416 4443 3033 2226
09-17 55° 86° 8533 6455 4471 3054 2242
09-18 54° 88° 8582 6494 4501 3075 2258
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 56° 89° 8632 6534 4531 3097 2275
09-20 60° 88° 8684 6577 4563 3121 2294
09-21 65° 82° 8736 6618 4595 3145 2313
09-22 63° 71° 8781 6653 4620 3162 2325
09-23 62° 79° 8830 6692 4649 3183 2341
09-24 66° 79° 8880 6732 4679 3205 2358
09-25 62° 74° 8927 6769 4705 3224 2371
09-26 54° 78° 8970 6803 4729 3240 2382
09-27 52° 85° 9017 6839 4755 3258 2396
09-28 56° 88° 9067 6879 4785 3280 2412
09-29 56° 86° 9116 6918 4815 3301 2429
09-30 54° 83° 9163 6955 4841 3320 2443
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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