Do leaves fall in spring?

Answer: The leaf drop is probably due to anthracnose. Anthracnose is a common fungal disease of trees in Iowa. Anthracnose may occur on ash, sycamore, maple, oak, walnut, and other deciduous trees (see encyclopedia article Anthracnose on shade trees).

Cool, rainy weather in spring favors anthracnose. Why is my ash tree dropping leaves? Anthracnose, a tree fungus, can cause ash trees to lose their leaves early. Moist, humid weather allows the fungus to thrive and turns leaves a blotchy brown. And remember, a tree without infestation symptoms may just need water. Click to see full answer. Feb 23, The fungus causes large, irregular brown patches on young leaflets, usually following the veins.

Leaves may be deformed, and leaf drop can be severe, especially in the lower part of the tree where the foliage is slow to dry. By the time you notice leaf drop, the fungus has usually run its course, and no treatment is bushhaul.barted Reading Time: 1 min. Sep 01, Anthracnose, a tree fungus, can cause ash trees to lose their leaves early. Moist, humid weather allows the fungus to thrive and turns leaves a blotchy brown.

Anthracnose tends to not be a huge issue for ash trees. Raking and destroying diseased leaves can help minimize the harm.