2 Hosts Oaks can be organized taxonomically into three . Oak wilt is a fungal disease that is carried to oak trees by small beetles that feed on the sap produced from fresh wounds to the tree (i.e. Thus, those who intend to prune their oak trees are encouraged to do so in the winter instead of the high-risk period from April 15-July 15 when the beetles are most active. Red oaks in Michigan include northern red oak, black oak, northern pin oak, pin oak, scarlet oak and shingle oak. Injections of a fungicide with propiconazole as the active ingredient may offer protection of nearby valuable, healthy oak trees. Oak Wilt confirmed in 70 percent of Michigan counties. Archives. Although the spring season is usually the ideal time for many people to complete yard work, oak trees benefit greatly from being pruned during the winter months instead. They will open for the season on June 1. It does this by plugging up the areas in the tree where water moves, slowing the water down and causing the leaves to wilt and fall off. Especially avoid pruning mid-April to mid-July. The training included classroom activities on disease biology, diagnosis, management and research and field exercises on oak wilt identification and management. I have noticed minor leaf drop when I mow the lawn each week. Extent of range. Red oaks are very susceptible to oak wilt, dying in a matter of weeks following an infection, while white oaks are less susceptible and take a year or more to die. Fortunately, this valuable resource can be protected by utilizing effective management techniques. Once the wood is dry and the bark is loose or fallen off (about one year), it is no longer a source of infection. In the United States, oak wilt has been confirmed in 24 states. Oak Wilt in Northern Michigan. Michigan United Conservation Clubs, a 501c3 nonprofit conservation organization, ← Deer Regulations Appear at November NRC, Wolves Discussed. December 2020 November 2020 October 2020 September 2020 August 2020 July 2020 June 2020 May 2020 April 2020 Towering nearly 100 feet tall, it can live up to 150 years and offers plenty of shade under its heavily-leafed, spreading branches. Comments are closed. ReLeaf Michigan's Big Tree Hunt has been featured on several news outlets recently, including Michigan Radio and Lansing's WLNS. The company is a Michigan Domestic Limited-Liability Company, which was filed on April 26, 2019. Monique Sakalidis, Michigan State University, Department of Plant, Soil, and Microbial Sciences and Department of Forestry, and Ruth Dorando Marcy, MSU Extension. Search This Site. Report suspect oak wilt in Michigan:. Red oaks are very susceptible to oak wilt, dying in a matter of weeks following an infection, while white oaks are less susceptible and take a year or more to die. Some beetles will be active throughout the summer and early fall. Tags Oak wilt is an important disease in urban areas where trees are highly valued. By: K. Michelle Moran | Grosse Pointe Times | Published April 9, 2019 An infected tree is often first noticed when leaves suddenly drop or turn brown in the summer months. 2014 distribution map of Oak Wilt in Michigan (Michigan DNR, 2014) Sarnia, ON Windsor, ON Sault Ste. Oak wilt was established in all treatment areas, and these treatments were implemented to contain those epicenters and control oak wilt spread. Oak wilt is caused by bugs that feed on the sap of a newly trimmed tree. The maps are an integration of various sources, reviewed by regional authorities. BRIGHTON, Mich. – Oak wilt is a fungus and a quick tree killer which shows up between April 15 and July 15. The disease is the latest threat to hit Michigan trees. Oak wilt, caused by the fungal pathogen Bretziella fagacearum, was first reported in Michigan in the 1970s. It causes untimely death of oak trees and spreads extremely quickly both below and above ground. Because use of a vibratory plow was not an option for this site, we used a girdle technique to kill northern red oak trees that were infected with oak wilt and / or within root grafting distance of infected stems as identified using Johan Bruhn’s model.