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200 <br />COUNCIL MEETING AUGUST 10, 1 3h7 <br />All oak trees within the City diagnosed as having Oak Wilt shu <br />be isolated from neighboring healthy trees of the same- species by <br />chemical or mechanical disruption of common root grafts, to prevent <br />the root graft transmission of the Oak Wilt fungus. <br />To control the overland spread of Oak Wilt, the pruning of oaks <br />shall be avoided during the most susceptible months of May and June. <br />If wounding is unavoidable during this period, as in the aftermath of <br />a storm or when the tree interferes with utility lines, an asphalt <br />based tree wound dressing shall be applied immediately. <br />Trees of the Red Oak Group diagnosed as having Oak Wilt may be <br />girdled as soon as they are detected in order to speed drying and <br />reduce spore production. Girdling shall be done only in areas her a <br />weakened tree will not constitute a hazard to life and /or property <br />should it fall. Trees included in this group are commonly known as <br />Red Oak, Pin Oak, Scarlet Oak, and Black Oak. <br />To prevent Oak Wilt fungus spore production and control overland <br />spread of this disease, any diseased material of the Red Oak group <br />desired for use as fuel wood or to be salvaged for other purposes, <br />must be debarked or else completely covered by heavy plastic (4mil or <br />greater) until July lst. <br />Any branch or other material of the Red Oak group not to be <br />salvaged, shall be disposed of by burning, chipping, or removal to <br />authorized dump site. The City Forester shall advise accordingly. <br />Stumps of trees of the Red Oak group removed due to Oak Wilt, <br />shall be completely covered, removed, or debarked to the gound -line to <br />eliminate all possibilities of spore formation and overland disease <br />spread. <br />Trees of the White Oak group (ie. White Oak, Bur Oak) diagnosed <br />as having Oak Wilt should be isolated by root graft disruption, as <br />previously stated. Diseased material originating from such trees will <br />not support spore formation and salvaged material therefore will not <br />require special treatment to control overland disease spread. <br />Standing trees of this group showing symptoms of minor Oak Wilt <br />infection may have such infection successfully removed by selective <br />pruning. The City Forester will advise accordingly. <br />902.06 Transporting Elm and Oak Wood Prohibited. It is <br />unlawful for any person to transport within the City any hark- -bearing <br />elm or oak wood without having obtained a permit from the City <br />Forester. The City Forester shall grant such permits only when the <br />purposes of this ordinance will he served thereof. <br />PAGE 11 <br />