[Arid_gardener] Re: Droopy Oleander

[Olin Miller]

Oleander leaf scorch, a bacterial disease that is vectored primarily by the
smoketree sharpshooter, see (with photo) at
http://www.myrmecos.net/insects/Homalodisca3.html
Although oleander leaf scorch has been a serious problem in some parts of
the valley, I am not aware that it is a given that all oleanders will die
from it.  Ours are still okay.  For information about the problem (with
photos), see
http://cals.arizona.edu/PLP/plpext/diseases/trees/oleander/oleleaf.htm
Test for adequate watering by inserting a slim steel rod at the root zone
after watering.  It should penetrate easily to 1-3 feet depending on the
size of the plant.  Do not water again until the root zone is nearly dry.
Syringing the plant with a light soft water spray during the hot days will
also help to cool the plant.  Contrary to popular lore this will not burn
the foliage provided it is water only and not a fertilizer or insecticide
spray.

Olin Miller, Master Gardener Volunteer
U of A Cooperative Extension, Maricopa County AZ
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----- Original Message ----- From: <sammy306 at offspringnet.net>
Sent: Thursday, June 28, 2007 11:52 AM
> Mike Sampson
> 85374
> sammy306 at offspringnet.net
>
> Hello:
>
>         I have 2 new rose bushes that I planted about a month ago. They
> are getting new leaves and 1 is getting new roses but the leaves on both
> plants continue to turn brown . I read where they need lots of water so I
> have been doing that. Could the brown leaves be a pest or a lack of
> something in the soil?
>
>      I also read an article that says that all of the oleanders will
> eventually die due to a bug that is coming to the valley? Is this true?
> Also 1 of my oleanders (sister agnes) was growing very quickly earlier
> this year but the last few weeks it seems droopy. I have watered it but it
> still seems droopy. Have I watered it too much? I know they are very hardy
> and like the heat so I don't think that could be the problem. Any ideas?