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Iris leaf spot

Symptoms

Ugly brown speckles appear, merging to affect entire leaf in extreme cases.

Find it on: irises
Time to act: spring, summer, autumn

Overview

A fungal disease weakens the plant and can seriously reduce its flowering performance. The brown spots eventually grow together and develop grey centres. Infection is caused by air or water-borne spores entering the plant through damaged leaves. In wet weather the fungus spreads quickly. The spores are persistent and overwinter in the soil and on old leaves, stems and rhizomes.


Solution

Ugly brown speckles appear, merging to affect entire leaf in extreme cases.

Organic

Healthy plants are less likely to succumb to an attack. Clear away leaf debris lying on the ground around the plants. Take care not to damage leaves and stems unnecessarily.




Discuss this problem

Talkback: Iris leaf spot
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chota 24/11/2011 at 15:28

I have been to my local garden centre and none of their fungal products contained carbendazim! Has this product been taken off the market or are there substitutes of perhaps another name is used for the same product? Interested in your view or information on this.
The information was good and clear, just what I wanted and it answered my query. I will feel happier when I can dose my iris plants with the correct fungal spray.