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IPM Scouting in Herbaceous Perennials

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Veronica rust
IPM scouting in herbaceous perennials > veronica rust
Pathogen: Puccinia veronicae-longifoliae.

Hosts: Veronica longifolia and V. spicata.

Symptoms: Bronze, purplish overcast on the upper surface of infected foliage. Raised, reddish brown pustules on the underside of foliage. When disease is severe, significant foliar blighting occurs.

Spread: This disease was unintentionally introduced to Michigan in 2004 and was found again in 2005. The disease occurred on field-grown Veronica. To date it has been a problem in very few nurseries. Long- distance disease spread is thought to occur when infected propagation material is moved. Spores, produced on foliage, are carried by wind currents.

Management: Carefully inspect incoming plant material for signs of rust; pay particular attention to material that originated offshore. Plants with rust pustules or other disease symptoms should be destroyed. Fungicide applications are needed for disease control in some situations. Resistance development is a concern – follow recommended fungicide resistance management strategies.
Veronica rust plant Underside of Veronica leaf Foliar blighting
Veronica rust plant. Raised rust pustules on the underside of a Veronica leaf. Foliar blighting of field-grown Veronica caused by rust.
This information was developed from A Pocket Guide for IPM Scouting in Herbaceous Perennials by Jan Byrne and Raymond A. Cloyd. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2981).
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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Updated 9/28/07