Very common here in wet springs, particularly on sycamore. One of the most over-treated problems in the trade. In Fishers, fishers was not one of the 23 communities in Indiana DNR's street-tree sample inventory, so no verified species breakdown exists for the city. What is documented is that the Tree Board maintains a list of desirable and undesirable species and no species off that list may be planted as a street tree without special permission — the practical picture being a 1990s-2000s nursery palette in tight uniform age classes, with ash gone since EAB was confirmed in Indiana in 2004. Almost never fatal on an established tree.
Fishers's canopy and what's at risk
Fishers was not one of the 23 communities in Indiana DNR's street-tree sample inventory, so no verified species breakdown exists for the city. What is documented is that the Tree Board maintains a list of desirable and undesirable species and no species off that list may be planted as a street tree without special permission — the practical picture being a 1990s-2000s nursery palette in tight uniform age classes, with ash gone since EAB was confirmed in Indiana in 2004.
What to look for
Brown blotches along leaf veins, early leaf drop, sometimes twig dieback. Worst after a cool wet spring.
Whether the tree can be saved
Almost never fatal on an established tree. It looks alarming, the tree defoliates, and then it leafs back out. Most calls about it don't need a treatment at all.
Timing in Hamilton County
If treated at all, at bud break — but raking and binning fallen leaves does more than spraying.
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