Problem with my lanes late orange

[Slicko]

The pictures below show diseased parts of the most recent flush on my lanes late orange tree. The diseased part covers about half of the circumference of the branch. Upward of the diseased part there is increasing choloritic effect on the leaves. In places there are shiny parts where it appears as though sap has emerged and hardened.

It effects a significant part of this last season's flush. Tree was planted in mid year 2014 and is on dwarfing rootstock.

The disease is not evident in my remaining five citrus trees.

Obviously I would like to know what the problem is and how I can deal with  it

Mick

[Millet]

Looks like citrus leprosis. Regular miticide sprays will control it, and the tree should recover - Millet

[Riverland]

Citrus leprosis virus is not present in Australia. However I would agree with millet that it does look like you have mite damage.

[Slicko]

Thanks guys, I will let you know how it goes.

Mick

[Axier]

Sometimes, cold winds produce a similar damage.
You are in winter...