Q.ornamental tree leaves turning brown
Leaves curling and turning brown in AZ.
Downtoearthdigs
Answered on December 2, 2015
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
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