Kaiser panorama city map12/29/2023 ![]() HRD is not the only health issue impacting pines. Fungicides are mixed in water, so application is not possible when temperatures are below freezing. New infections are most common when spores from nearby fungi land on freshly cut stumps, so using preventative fungicides on freshly cut conifer stumps is the best way to protect Wisconsin’s forests from HRD. Preventing HRD is critical because it is challenging to control once it is established in conifer forests. HRD is a rot fungus that decays the wood of the roots and lower stem, so infected trees may have stringy yellow rot that causes the stems to break off. ![]() ![]() The fungi are most visible on seedlings, saplings and tree stumps. HRD can spread through connected conifer roots below ground and often shows up as clumps of trees that seem to die off one by one. Please report suspected cases to your local forest health specialist. The DNR maintains an online map with all known locations of HRD. To find the fungi, you may need to scrape away needles and other debris. This fall, watch for new, bright white growths on conifer bases, stumps, seedlings and saplings. Heterobasidion root disease (HRD) is a severe fungal infection that kills pines, spruces and other conifers in Wisconsin. MADISON, WISCONSIN ~~~~~ Octo(LSNews) The Wisconsin Department of Natural Resources (DNR) is asking the public to check needle-bearing trees for signs of a harmful disease and report their findings to the department. Categories: News Wisconsin Michigan, Lake Superior Circle Tour, Lake Superior South Shore Check Conifer Trees For Severe Root Disease Heterobasidion root disease (HRD) is a severe fungal infection that kills pines, spruces and other conifers in Wisconsin
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