Need some advice. I have a lime tree and a few months back, I noticed white tiny rectangular spots appearing on my lime tree. So I cut off the affected branches and rub my hands on the trunk to remove the spots.
It worked and I thought it would be fine but looks like the problem is back. The trunk is covered with the white spots again and the leaves too (underside). Its not moving at all but keep getting more and more.
I have already trimmed it down with two branches left. I am wondering what disease this is, whether its a root disease or surface disease and what I should do.
I have used neem oil couple of times but no effect whatsoever. I am at the verge of unplugging it and replanting with a new lime tree. Or should I cut off the trunk at the base of the soil?...