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Have
your trees dropped their leaves early?
We have received many reports of early leaf drop this year on ash, oak,
hickory and other species. This summer’s prolonged wet, humid periods in many
parts of the state were favorable for late-season leaf diseases, which are
different from the common anthracnose diseases in early spring. Affected leaves
generally have brown blotches or spots, and, unfortunately, often fall from the
tree before achieving peak color. The good news is we anticipate minimal
long-term impacts to tree health from most of these leaf diseases. Good tree
care practices will help ensure your trees remain healthy for years to come.
Ash
Leaf Spot
Ash leaf spot
(Mycosphaerella leaf spot) is common on ash trees this year. Some affected
trees have already lost most of their leaves. There are no recommended
treatments since defoliation usually occurs late enough in the growing season
that the impact on tree health is minimal. Visit this page for
more information: bygl.osu.edu/index.php/node/413
Tubakia Leaf Spot of Oak
Tubakia leaf spot is
common on oaks in late summer and fall. Affected trees may appear ragged, but
should look healthy next spring. Treatment is usually not necessary. More
information is available on this page: hort.uwex.edu/articles/tubakia-actinopelte-leaf-spot/
Leaf diseases are causing blotchy brown areas on these oak leaves. MDC photo |
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