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Disease Problems <br /> <br />There are several disease problems in the city. The most important <br />may be oaklwilt. Oak species comprise over 47% of the forest in <br />Ramsey. Over 6% of these trees are dead. This indicates a problem. <br />1979 data Shows that approximately 4% of the population was dead. <br />Also, over 50% of the elms in the city are dead. <br /> <br />Oak Wilt <br /> <br />Since oaks are a significant component of the forested areas in the <br />City of Ra~sey, oak wilt should be a consideration, see Table VI. <br />Oak wilt is a disease caused by the fungus Ceratocystis fagacearum. <br />Once the tree becomes infected, is rapidly declines as the disease <br />spreads throughout the tree's vascular system. The presence of the <br />fungus stimulates the tree to produce gums and resins in an effort <br />to block the spread of the disease. In red oaks, the tree's attempt <br />to block t~he spread of the disease fails, but not before the <br />production of the-gums and resins cuts off the tree's water supply, <br />resulting in death. Once an infected red oak begins to wilt, <br />complete death can be expected in two to four weeks. Red oaks <br />never recover from the disease. Bur oak generally last one to two <br />seasons wi~h the disease, while white oaks are more resistant to <br />oak wilt a~d can survive for several years before dying. <br /> <br />Oaks are infected with oak wilt in two different ways. Insects can <br />start new infections by carrying spores from wilted trees to <br />wounded but~otherwise healthy trees in the spring. Ninety percent <br />of the time. the disease is spread through~the roots, from diseased <br />trees to healthy oaks sharing interconnected root systems. <br /> <br />Kunde Co., Inc. - Consulting Foresters <br /> <br /> <br />