A Heterobasidion root disease (HRD) fruit body with new white growth observed in the fall. Photo: Wisconsin DNR
The Wisconsin Department of Natural Resources Forest Health Newsletter reports that the fungicide Rotstop® C is no longer available in North America.
Rostop® C is commonly used to protect against Heterobasidion root disease (HRD) during conifer timber harvests. It has been discontinued in the North American market. Cellu-Treat® is now the only registered and available to prevent HRD in Wisconsin. Check out the article from DNR Forest Health for more detail.
As always, remember to report your pesticide use when applying these or any other pesticides on property in the MFL Certified Group. You can use the online reporting form or send the required information to MFLForestCertification@wisconsin.gov.
Cities, villages, towns, counties, tribes and 501(c)(3) nonprofit organizations in or conducting urban forestry projects in Wisconsin can now apply for a regular or startup 2026 Wisconsin Department of Natural Resources (DNR) Urban Forestry grant. The total 2026 available funding is $559,680, with a possible release of $139,920 of catastrophic storm reserve to fund a second round in March 2026. 
The Wisconsin Department of Natural Resources is partnering with the UW-Madison Division of Extension to host a series of fall workshops on invasive species plant identification and management. Learn about invasive plants in urban settings, focusing on identification, impacts, management and available resources. Dr. Mark Renz (professor and Extension specialist with UW-Madison) will lead the instruction, with Travis Wilson, Matt Wallrath and John Zabrosky assisting. Each workshop will include morning classroom instruction followed by hands-on field demonstrations in the afternoon. The cost of the workshop is $40 and includes lunch. 
The International Society of Arboriculture (ISA) is launching a new credentialing management system and an updated pricing structure, going live on July 15, 2025.
The National Association of State Foresters (NASF) is accepting nominations for its 2025 awards. Only nominations submitted on or before Friday, Aug. 1, through 
*These training opportunities are provided as an information service only and do not constitute an endorsement from the Wisconsin Department of Natural Resources (DNR).