[Arid_gardener]Hard Raised Knuckles & Yellowing Citrus leaves &

[Olin Miller]

I have seen the growths or galls you describe on older citrus trees but
can't really tell you what causes it or what to do about it.  If there
is no black or smelly ooze associated with it your tree may be okay.
For a better answer, try calling one of the Master Gardener offices
listed at the right margin at
http://cals.arizona.edu/maricopa/garden/html/general/question.htm

If the leaves on your tangelo tree are yellow all over, it may be a
nitrogen deficiency.  For fertilizing recommendation.  You can buy
fertilizer formulated for citrus "for Arizona Soils".  Follow the
instructions on the bag as to frequency and amounts.  If the leaves are
yellow between the veins but the veins are green, it is due to an iron
deficiency.  Apply a chelated iron supplement available in nurseries as
a liquid or wettable powder.

Olin Miller
Master Gardener Volunteer, Maricopa County AZ

"The opinions or statements expressed herein are my own and should
 not be taken as a position, opinion, or endorsement of
the University of Arizona."
======================================================

----- Original Message ----- From: "West, Neil H. (MDPD)"
<nhwest at mdpd.com>
Sent: Sunday, April 30, 2006 5:07 PM
>I have a key lime tree that is about 3 years old.  I have notice hard
>raised
> knuckles on the stems at the joints of other limbs, could this be
> canker.
> Also i have a tangelo that is very yellowish in color, what can I do?
>


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