Because the most common cause of this yellowing is iron deficiency, the disorder is called iron chlorosis (pronounced klor-OH ...

Question: we have several maple trees in our neighborhood afflicted with this black ... Symptoms first appear in late spring or early summer as infected leaves develop light green or yellow-green ...

You may also notice that the leaves turn yellow and die ... can wreak havoc on your Japanese maple trees is Verticillium wilt ...

"Thankfully it doesn't do any long-term damage to the trees, it just makes them look ugly," Mathers said. The fungal diseases also affected maple trees in Tioga County, where Mathers lives.