Orange tree - sour fruit - need help

[Norm]

Hey guys,

I have this Orange tree in my backyard (pictures below). It doesn't produce a lot of fruit and its quite sour when they do come up. Can it be fixed ? What kind of Orange is it ? What do I need to do ?

TIA,
Norm

 

[Chuck]

Hey guys,

I have this Orange tree in my backyard (pictures below). It doesn't produce a lot of fruit and its quite sour when they do come up. Can it be fixed ? What kind of Orange is it ? What do I need to do ?

TIA,
Norm

View attachment 16156 View attachment 16157 View attachment 16158 View attachment 16159 View attachment 16160

If the tree used to have sweet fruit and now it is sour, what has happened is that shoots from the rootstock has been allowed to take over the graft so now all you have is fruit from the rootstock which is 99% probably sour orange.

 

[Norm]

I don't see any shoots growing off the rootstock other than the main tree. I don't know what kind of fruit it used to have before.