Scouting rust diseases

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

Hosts include: Aconitum, Anemone, Aquilegia, Arisaema, Aster, Campanula, Hemerocallis, Heuchera, Liatris, Lupinus and Monarda.

Several perennials are commonly affected by rust diseases. Each rust pathogen has its own relatively small host range. Disease management strategies are fairly similar for this group of pathogens.

pustules
Raised reddish orange pustules
on propagated Arisaema.

rust lesions
Rust lesions on Heuchera.

Rust shot holes
The lesions may drop out
of the leaf, creating a shot
hole.

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