ornamental tree leaves turning brown

Question

Leaves curling and turning brown in AZ.

Answer 1

Leaf curl in any tree can indicate insects or disease.

You can treat the tree with Neem Oil.
Neem Oil works as both an insecticide and fungicide.

Here are some links for you.

http://aces.nmsu.edu/ces/yard/2006/061706.html
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm