Champgne orange with trouble...

[Cassio]

Maybe somebody can help to identify what is happening and how to solve the problem.
Note the grayish color in two points of the trunk. There, exists a really tiny point where the sap flows to outside of the trunk. Any ideas? 

[Cassio]

Well, looks like I figured what is that for myself: Gomosis is the name, and looks like Calda Bordalesa can solve the problem.

[Millet]

Normally gummosis (a phytophthora disease) is treated with systemic fungicides.   Are you planning to apply Calda Bordalesa, which I believe is a copper based  fungicide, as a topical treatment?  Are you sure it works on gummosis in a topical application?  - Millet

[Cassio]

Normally gummosis (a phytophthora disease) is treated with systemic fungicides.   Are you planning to apply Calda Bordalesa, which I believe is a copper based  fungicide, as a topical treatment?  Are you sure it works on gummosis in a topical application?  - Millet

Hi Millet!

Yes, its a copper based fungicide, and I´m already applying it. I think it´s known as Bordeaux mixture in english, I´m right?
I´m covering the trunk with the Bordeaux paste, and looks like it is doing effect, cause I don´t see sap flowing to outside the trunk anymore.