Hello everybody this is my 5 y.o. grafted Keitt mango.
It looks a bit ruffled (i've read it's quite common for this variety) but overall healthy.
Nevertheless there are several leaves showing a strange form of yellowing.
First some dark brown spots appear then the leaves start yellowing and eventually fall down.
I couldn't spot any scritters/mites/aphids/insects inspecting both leaf sides with a 20x magnifying lens.
Any idea?
I attach pictures of both sides of the leaves in three different stages as disease is progressing....