En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Wednesday - November 14, 2007

From: Glendale, AZ
Region: Southwest
Topic: Diseases and Disorders
Title: Navel orange disease problems
Answered by: Barbara Medford

QUESTION:

I live in Glendale, Arizona. I hav a mature miniature navel orange tree. This year it has lost a considerable amount of leaves. Also the fruit all has a large yellow spot. It looks pitiful. What should I do?

ANSWER:

We found an excellent site on dealing with problems with the navel orange trees. We really tried to find one from Arizona but couldn't, so you'll have to accept this Texas Cooperative Extension site, instead. Then, if you're really dedicated to find a solution, go to this site, "Diagnosing common citrus problems", and see what you can find that fits your situation.

As in a great many plant problems, especially, it would seem, with trees, plant stress gets a lot of the blame. One reference said that orange trees should be fertilized 6 times a year, starting in early March through August/September. Maybe your tree is just hungry. Or, if the trunk is not above the surface of the surrounding garden, or there is mulch spread over the root zone, the tree may be developing root rot or foot rot. Charming terminology. It look to us like the experts were pretty nonchalant about most of the problems with navel oranges, with comments like "not worth treating", etc. It's up to you to plow through that chart on citrus problems and see if it's worth it to you.

 

More Diseases and Disorders Questions

Acid rain in Ft. Worth?
August 19, 2010 - ALERT. NEED IMMEDIATE ATTENTION. Why are so many trees, plants, etc. in the Fort Worth area dying?? I heard acid rain. Please don't say drought. I have lived in this area all my life and survived t...
view the full question and answer

Sap dripping from a lacey oaks in San Antonio
September 06, 2012 - I have a lacey oak tree, approximately 6 ft. tall that has been in the ground almost a year. The tree looks healthy but there is a small area on the trunk that looks and feels wet. The substance is s...
view the full question and answer

What to do about leaf spot on Vaccinium myrsinites in Clearwater FL?
June 24, 2010 - I have recently planted many Vaccinium myrsinites (shiny blueberry) in my yard. These plants seem to have many dead twig branches without leaves. The remaining leaves have red spots. I visited a na...
view the full question and answer

Orange patches circling cedar branches
May 15, 2010 - We have dry rusty orange patches that circle several of our Cedar branches. There are a few orange blobs on different limbs, but they do not look like the pictures of Cedar Rust (no horns). The foli...
view the full question and answer

Growing Loblolly Pines Outside Native Range
April 03, 2014 - I would like a stand of pines on my property but do not know if they will grow in my area. Do you know if the soil in Waelder, Texas will support pines?
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center