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.
The tar spots that can occur on sugar maple, red maple, and our other native maple species is caused by one of two other species of Rhytisma (R. americanum, and R. punctatum). Tar leaf spot diseases that occur on our native maple species are occasionally observed, but cause inconsequential damage. Tar leaf spot on Norway maple. Leaf infection can begin in early spring, as the leaves are expanding, and can continue into the early summer.