Great Estates Yard & Tree Home Page, Residential and Commericial Tree and Landscaping Services. Great Estates Yard & About Us Page, Servicing Central Minnesota, Minneapolis and St. Paul. Great Estates Yard & Tree ISA Arborist Page, Servicing Central Minnesota and Twin Cities Locations. Great Estates Yard & Tree has experience diagnosing and handling a variety of tree diseases. Great Estates Yard and Tree Contact Page. Free Tree Care and Landscaping Estimates.

   Minneapolis Tree Service with an ISA Certified Arborist on staff.  Licensed and  Insured Tree Care Company.  Experienced Tree Care Specialists serving Minnesota.

   Tree Care Company specializing in tree trimming or pruning, tree removal, stump grinding, storm damage and clean-up, cabling and bracing, tree and sod installation, shrub and hedge shaping, retaining walls, firewood, disease diagnosis,  and other tree and landscaping needs.

   Certified Tree Inspector.  Disease Diagnosis for Dutch Elm, Emerald Ash Borer, Oak Wilt, Gypsy Moths, Scales, and others tree diseases.


Oak Wilt Disease

Oak Wilt is caused by a fungus ceratocystic fagacearum. When introduced to the vascular system of an oak tree, this fungus spreads quickly through the sapwood just beneath the bark. In an attempt to protect itself, the tree produces gums and tyloses which plug the water conducting vessels. This ultimately cuts off the trees own water and nutrient supply between the roots and crown of the tree.


Oak Wilt can be spread in two ways, through root graphs or by insect vectors.

Roots graphs - Most new infections of oak wilt are spread through overlapping roots of unaffected and infected trees. Often trees as far as fifty feet apart may have roots grafted together. This can be the case with oaks of different species. Control in these cases involves severing the root connection between healthy and infected trees. This can be done by a professional by either trenching or by applying a chemical barrier known as Vapam.

Insect vectors -  Although less frequently with oak wilt (about ten percent of the time) new infections are caused by insects, primarily sap beetles. Sap beetles are commonly in contact with fungus between the bark and wood of the oak wilt killed trees. Several species of the same sap beetles are then attracted to fresh wounds on healthy oaks from April to June, where the fungus is then transferred to the vascular system of the tree.

Red Oaks and Pin Oaks -  are highly susceptible to infection, and this can be easily identified by rapid wilting of a tree. These trees will usually wilt completely within two to six weeks. Trees wilt from the top of the crown down and leaves wilt from tip to the base, turning bronze to brown. Fallen leaves are often green at the base. For these trees, infection is a death sentence.

White Oaks and Bur Oaks -  are less susceptible and die a slower death, usually a branch at a time and is often a process spanning many years. Treatment of these trees showing early symptoms can prevent further development.

Licensed Tree Service and ISA Certified Arborist serving the greater twin cities and central Minnesota, including: Minneapolis, St.Louis Park, Coon Rapids, Edina, Richfield, Bloomington, St.Paul, and more.

ISA Certified Arborist, Certified Tree Inspector, International Society Of Arboriculture