RE: Many Iris Problems

Delia,
	Leaf spot is a problem common among iris especially those in damp climates
and is a two year disease.  Meaning that you must treat for it for two
years!!  Leaf spot also becomes resistant to the fungicide you are using so
it is very important that you rotate your fungicides.  Not good news but it
is doable.
	Don't give up on our wonderful flower yet.  Before you do much else to your
iris bed, why don't you test your soil.  Iris will tolerate a wide PH range
but will not tolerate wet feet or soil that is too rich especially in
nitrogen.  If you had good bloom this spring then all that is left is to
correct your leaf spot problem.  Hang in there.

Dana Brown
AIS Region 17 Judges Training Chairperson
Director TBIS
AIS, ASI, MIS, RIS, SPIS, TBIS
Malevil Iris Gardens
Lubbock, TX
Zone 7 USDA, Zone 10 Sunset
d*@malevil-iris.com



-----Original Message-----
From: owner-iris@hort.net [o*@hort.net]On Behalf Of Delia
Burgess
Sent: Sunday, June 29, 2003 10:30 AM
To: Iris
Subject: [iris] Many Iris Problems

I'm just about ready to thow the towel in trying to grow Bearded German
Iris 'though I love them so much.
I prepared a new bed (4x30 ft.) 3 years ago to be used solely for
bearded iris,  incorporating plenty of peat moss.  When brown spots
developed on the leaves 3 years running I tried everything from cutting
the leaves off to spraying with Bordo every 10 days - to no avail.
Someone suggested the peat moss might have made the soil acidic and the
plant would be unable to get the nutrients it needed therefore causing
the spots so I added lime to the soil.  Last year most of the iris corms
were infested with iris borer and I dug every plant, cut out the rot and
borers, dusted with sulphur and replanted.  Early this spring I sprayed
once with Cygon which seems to have controlled the borers somewhat.
There was plenty of bloom but now that the blooms have finished  they
are rather ugly and the bed looks terrible.  All the leaves are affected
with brown spot, and the older leaves which first developed the brown
spots  have died and dried up.  If anyone can offer a suggestion as to
what I should do to alleviate this problem I would be most appreciative.

Delia, a newbie to the list

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