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Re: "Washed Out" leaf fans?? and Iris Borers

From: Bill Shear <BILLS@hsc.edu>

Tammy--iris borers don't occur in your area, and the bleached leaf centers
are not really a symptom.

Do these center-bleached leaves easily pull out of the rhizome, and is
there an odorless rot involved?  Can you see any fungal webbing around the
bases of the plants, or small masses of seed-like bodies?  Are the leaves
dying from the tips, or do they appear otherwise healthy?  Are all your
plants affected, or just a few?

Bleaching of part of a leaf can occur as a result of short-term drought,
frost damage (not likely!), or sudden exposure to direct sun after a time
in the shade.

I would suggest doing nothing, but remaining vigilant.  If newly emerged
leaves do not show the condition, then it was probably simply some
unexplained and perhaps unexplainable environmental effect.

Bill Shear
Department of Biology
Hampden-Sydney College
Hampden-Sydney VA 23943
FAX (804)223-6374

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