These agendas are marked, showing actions taken by TCEQ commissioners at agenda meetings. Commissioners present at the meeting are noted at the top of each document. The action taken by the Commission on each item is marked below that item. Initials beside the action are those of Commissioners present and voting. These agendas are provided in portable document format (PDF).
Tar spot is another one of the maple tree diseases. It is not as severe as other types of tree illnesses but nevertheless, it does do damage to the leaves. Tar spot starts out by turning the leaves a yellow color. From there small tar like looking patches start to from and spread on the leaf surface.
Although young trees may succumb to the disease within a year, mature trees may take years to succumb to the fungus. The figure on the right makes vivid the devastating effect the canker has on the American chestnut; it shows the canker of Chestnut blight that has encircled and killed an American chestnut tree. Original Distribution: The first study that looked into the source of the blight fungus disease was commissioned in 1913 by the USDA. Frank Meyer, who led the study for the USDA, reported in that year that the disease was found on chestnut trees in mountainous uplands of China.