mv670
Newly Registered
Posts: 5
Joined: Sun May 27, 2012 6:23 pm
Location: Los Angeles, Ca

Avocado tree leaves have brown spots/streaks

Hello, I have a problem with my avocado tree. Over the past few weeks some of the leaves have fallen off. I thought it was normal but I decided to have a closer look and I have noticed that most of the leaves(new and old) have a lot of tiny brown spots.

I am not sure if its root rot or something else and I was wondering if someone can help me out.

Thank you. Here are some pictures.


[img]https://i598.photobucket.com/albums/tt63/mv670/IMAG0033.jpg[/img]

[img]https://i598.photobucket.com/albums/tt63/mv670/IMAG0031.jpg[/img]

mv670
Newly Registered
Posts: 5
Joined: Sun May 27, 2012 6:23 pm
Location: Los Angeles, Ca

Help...anyone?

cynthia_h
Super Green Thumb
Posts: 7500
Joined: Tue May 06, 2008 7:02 pm
Location: El Cerrito, CA

I'm sorry no one with expertise has offered you any assistance thus far. I've taken the liberty of editing the title of this thread so that the situation is described more specifically (it was "Avocado tree advice"); maybe the new title will bring in some help. ::fingers crossed emoticon here, I wish::

Sunset's Western Garden Book entry for avocadoes (7th ed., 2001, p. 210) gives a few words on two attackers of avocado trees.

1) "Avocado trees are resistant to oak root fungus but very susceptible to Phytophthora root rot and must have excellent drainage to survive."

2) "Persea mite is a problem in Southern California; it causes small yellow and black dead spots on the foliage and excessive leaf drop. It can be controlled by releasing one of several species of predatory mites. For more information, contact your Cooperative Extension Office."

I hope these words from Sunset are helpful; please write back and let us know. Best wishes.

Cynthia H.
Sunset Zone 17, USDA Zone 9

mv670
Newly Registered
Posts: 5
Joined: Sun May 27, 2012 6:23 pm
Location: Los Angeles, Ca

Thank you for your response :D

One of the people at the local Home Depot believed a pest was the cause so he recommended a product called "All Seasons Horticultural and Dormant Spray Oil". I sprayed it yesterday.

Now... I decided to take a closer look today and I found this.

[img]https://i598.photobucket.com/albums/tt63/mv670/IMAG0043.jpg[/img]

This one was alive
[img]https://i598.photobucket.com/albums/tt63/mv670/IMAG0042.jpg[/img]

Eggs maybe?
[img]https://i598.photobucket.com/albums/tt63/mv670/IMAG0039.jpg[/img]


[img]https://i598.photobucket.com/albums/tt63/mv670/IMAG0035.jpg[/img]


Quick question....Does root rot encourage new leaf growth?

mv670
Newly Registered
Posts: 5
Joined: Sun May 27, 2012 6:23 pm
Location: Los Angeles, Ca

Alright after some research, my tree is definitely infested with persea mite. Looks like the spray did its job. I do no see any more brown spots on the new or old leafs. Predatory mites for sale huh...I would have preferred to use those instead of that spray but..oh well..

Some good news...I found two ladybugs on my tree today.. :D



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