lime leaves wither

Question

What causes the leaves at the end of a branch on a small lime tree to wither?

Answer 1

This can be caused by a lack of water, thrips or Anthracnose.

This article will help with thrips:
http://www.ipm.ucdavis.edu/PMG/r107301711.html

And this will help with Anthracnose:
http://www.ipm.ucdavis.edu/PMG/r107102111.html

Just because it is the easiest, try increasing water to see if that helps.