Irregular brown to reddish spots develop between veins and along margins. Infected leaves turn yellow and drop prematurely. Use chlorothalonil, copper products, mancozeb, maneb, myclobutanil, propiconazole, sulfur, thiophanate-methyl or triadimefon. Small, irregular spots that become shiny, tan to black and raised.
Some varieties have resistance.
Mancozeb may be used. Initially, infected trees have scattered dead branches. Brown streaks in sapwood. Leaves wilt, turn yellow and brown. Terminal parts of tree affected first and later the entire tree.