We have. 50 year old miniature orange tree that all of a sudden seems to have either a decease or a bug infection. There seems to be a small brown very hard round spot developing on the underside of some leaves as well as on the stem where some oranges are developing. Small oranges start to ripen then fall off. Also a sticky substance. It has produced wonderfully year after year. I will Attach photos of the tree last year and also a photo of what i spoke about. Please send me some ideas of what is happening and what we can do to cure the tree. Thank you.
Wendy. Where are you located?
