Iris Borer - July

Post by **canadian-gardening** » Thu Jul 23, 2026 5:18 pm

Today I was cleaning my garden and I notice some of my Irises were missing.
The Rhizomes were still there, but leaves were rotten.
Dug them up and notice a hole - followed the hole - and yes - an ugly caterpillar.

Date spotted: July 23
Plant affected: Irises
Observation: Dead leaves and a hole in the rhizome
Approximate size/stage: about two inches fat caterpillar
Action I took: I cut right through the rhizome and caterpillar.
Cleaned the Rhizome and planted the clean rhizome back again.
Now I am going check my other Irises.

https://canadian-gardening.ca/flowers/growing-irises/
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