[Arid_gardener] Question from Home-Hort WWW page

[Olin Miller]

I don't know if the fungicide is available to home owners.  I have never
seen it in garden centers or nurseries.  Depending on how much you are
willing to save the tree, I would suggest hiring the arborist.  And try
to get a guarantee.  You may want to review the label at
http://www.bayercropscienceus.com/=file:Labels%20MSDS/11454728895958850ac83d1446870539/file
(URL may wrap).  Also, water at the drip line of the tree and  construct
a berm about one foot or more from the trunk  to keep the irrigation
water from touching the trunk..

There is a rather lengthy article at
http://cals.arizona.edu/pubs/diseases/az1124/#phyd
that describes the fungus, its causes, symptoms, and control.  The gist
of it is

"Avoid planting into heavy, poorly drained sites. Break open any caliche
area that prevents water percolation. Avoid over watering. Once collar
rot has been identified there are few options available for control. A
systemic fungicide is applied as a drench around the trunk of infected
trees. Severely infected trees cannot be saved. The fungicide is
effective in controlling the spread of the disease and also for
treatment of early infections"

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: <rdczz99 at yahoo.com>
Sent: Wednesday, April 26, 2006 12:33 AM
> Randy,  85210,  rdczz99 at yahoo.com
> An arborist diagnosed my ash tree's as having Phytopthora root rot.
> He recommended that I pay him to do a soil drench in the spring and
> another in the fall to help solve the problem.  According to a local
> nursery, the active ingredient for the soil drench would be Alliette.
> Is there any advantage of having the arborist do the soil drench
> instead of me doing it myself?  Are there any tricks of the trade I
> should know about?  How deep do I need to drench?  The primary cause
> of the root rot is that I was watering way too often and right at the
> base of the tree.  So, the root rot is probably most heavily effected
> right at the base of the tree.  Should I cover all of the soil out to
> the dripline or focus on the base of the tree.
>
> Thanks,
> Randy
>
>
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