Avocado Trees
Q.

Leaf disease on a large avocado tree in Hawaii

Zone Makawao, HI 96768 | Anonymous added on January 30, 2018 | Answered

The leaves have developed rust-colored spots that do not scrape off. We have had a very wet winter. Would it help to rake up leaf debris under the tree and then fertilize it? The huge tree is covered with flowers. The spots seem to match pictures of a fungus found on a number of sites. No other leaf problems--just the spots.

A.
A.Answers to this queston: Add Answer
Downtoearthdigs
Certified GKH Gardening Expert
Answered on January 31, 2018

There are a couple of diseases that might be affecting your tree. This paper on them will be helpful for you to identify the problem:
http://manatee.ifas.ufl.edu/lawn_and_garden/master-gardener/gardening-manatee-style/a/avocado-diseases.pdf

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