Re: CULT: TB Scorch
- Subject: Re: [iris-talk] CULT: TB Scorch
- From: o*@aol.com
- Date: Mon, 24 Jun 2002 11:37:37 EDT
I do not know the content of previous post or advice you received on this
subject. However, scorch is an insect vectored disease as per some fairly
recent research (about two years old). At the time the culprit was
identified, the specific insect had not been. Hence, it could have been a
larva stage or several different insects. I would have little concern about
planting in the same ground. If however you wish to be safe, treat the soil
with a garden insecticide labeled for iris use.
Should you experience scorch in the future, heat is the best cure. You need
to dig the rhizome and maintain it at a relatively high temperature (104
degrees) for a period of time (48 hours I think). As a practical solution,
lacking an enviorenmental chamber, I have used both a covered fish aquarium
and a gallon jar to construct a "solar kiln". I put a thermometer inside and
opened or closed the top to regulate temp. My tempertures ranged from 80
degrees to 110 degrees over a 5 day period. Both times the rhizomes lived and
exhibited no subsequent scorch when replanted.
If memory serves me correctly research was conducted by the University of
Minnissota, but may have been University of Michigan or neither.
Tellin' all I know cause I'd rather write this than clean junk out of shed,
Smiles,
Bill Burleson 7a/b
Old South Iris Society
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