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Another possibility for spots in Iris

Hi again:

Just looked up iris in my plant problem book.  Another possibility for the translucent, oval leaf spots is actually called leaf spot disease.

"Plants won't die but lose vigor and become susceptible to other problems.  This common disease is caused by a fungus that infects wet foliage and thrives in humid weater.  Control calls fo removing and destroying spotted leaves early in the season and removing tops in fall.  Be careful not to overwater, especially in wet weather.

It also says to look for a reddish colored border around the spot.

We've learned in the Pests and Problems of Ornamental Plants class that plants experiencing distress from one problem send out chemical signals that attact insects (slugs too maybe?) which bring more problems.

Diana Pederson, Michigan, Zone 5, United States
SUITE101 Editor:  http://www.suite101.com/topics/page.cfm/262
Home page:  http://www.geocities.com/Heartland/Acres/1945/index.html

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