Oak Wilt Thermal Model

Oak wilt is a fungal disease carried by bark beetles. Prevention involves avoiding pruning or cutting oak trees during peak beetle flight periods (spring-summer). Use this thermal model to understand the risk in your area.

Oak Wilt Vectors Emergence Thermal Model

Thermal model:

Location: 45.0°N, -93.2°W (show on Google maps)
Date range: January 1, 2025 to January 22, 2025

Degree day model: Base 41°F
Total degree days: 0.0 Fahrenheit degree days
Oak wilt high risk period: 231 - 2172 degree days and date prior to July 15

Predicted risk: Low - prior to vector emergence

Recommendation for Jan 22, 2025:

The risk of above-ground transmission of oak wilt is low.

Note: Growing degree days can accumulate quickly and subsequent recommendations can change quickly in March, April, and May. Please check back daily.

Note: When you consider extending harvesting deadlines, it is important to be aware that the stumps and wounds are susceptible for up to 72 hours after cutting.

Estimated vector emergence status: Based on the degree day model (Jagemann et al., 2018), it is estimated that less than 5% of Colopterus truncatus have emerged as of the date yet. C. truncatus and Carpophilus sayi are the two most important insects that transmit oak wilt in Wisconsin. C. truncatus emerges earlier in spring than C. sayi.

View all Degree Days for this date range | | Back

Degree days and oak wilt risk from January 1, 2025 to January 22, 2025 for (45.0, -93.2):

	Date	Day	Min temp (°F)	Max temp (°F)	Oak wilt risk
1	2025-01-01	Jan 1	17.6	24.7	Low - prior to vector emergence
2	2025-01-02	Jan 2	10.8	20.7	Low - prior to vector emergence
3	2025-01-03	Jan 3	6.5	15.5	Low - prior to vector emergence
4	2025-01-04	Jan 4	-1.8	10.8	Low - prior to vector emergence
5	2025-01-05	Jan 5	-1.5	16.0	Low - prior to vector emergence
6	2025-01-06	Jan 6	1.5	19.8	Low - prior to vector emergence
7	2025-01-07	Jan 7	7.2	19.3	Low - prior to vector emergence
8	2025-01-08	Jan 8	3.5	19.1	Low - prior to vector emergence
9	2025-01-09	Jan 9	12.3	22.6	Low - prior to vector emergence
10	2025-01-10	Jan 10	18.1	27.4	Low - prior to vector emergence
11	2025-01-11	Jan 11	16.7	25.5	Low - prior to vector emergence
12	2025-01-12	Jan 12	-1.0	27.8	Low - prior to vector emergence
13	2025-01-13	Jan 13	-3.3	6.3	Low - prior to vector emergence
14	2025-01-14	Jan 14	-8.7	6.4	Low - prior to vector emergence
15	2025-01-15	Jan 15	-2.2	29.2	Low - prior to vector emergence
16	2025-01-16	Jan 16	27.6	34.8	Low - prior to vector emergence
17	2025-01-17	Jan 17	17.9	37.9	Low - prior to vector emergence
18	2025-01-18	Jan 18	-4.7	16.6	Low - prior to vector emergence
19	2025-01-19	Jan 19	-13.4	-2.7	Low - prior to vector emergence
20	2025-01-20	Jan 20	-18.0	-7.2	Low - prior to vector emergence
21	2025-01-21	Jan 21	-19.0	10.7	Low - prior to vector emergence
22	2025-01-22	Jan 22	8.0	28.9	Low - prior to vector emergence

Note: Frost temperatures (<32°F) shown in blue, freezing temperatures (<28°F) shown in red.

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