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IPM Scouting in Herbaceous Perennials

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Cucumber mosaic virus
IPM scouting in herbaceous perennials > cucumber mosaic virus
Pathogen: Cucumber mosaic virus (CMV).

Hosts include: Aconitum, Aster, Astilbe, Campanula, Coreopsis, Delphinium, Echinacea, Gypsophila, Helianthus, Heuchera, Hosta, Ligularia, Lilium, Lysimachia, Oenothera, Penstemon, Phlox, Primula, Scabiosa, Sedum and Viola. Many annuals and vegetables are also susceptible.

Symptoms: Symptoms vary widely, depending on the host plant; possibilities include distorted foliage, mosaic, mottling, stunting and necrosis. Symptoms can resemble herbicide injury.

Spread: This virus is spread by several aphid vectors. Aphids acquire and transmit virus particles by probing or feeding on plant tissues. An aphid can transmit the virus to susceptible plants for up to 2 hours after acquiring the virus from an infected plant.

Management: Infected plants cannot be treated and should be removed and destroyed. Suspect plants should be tested for CMV by a diagnostic lab or on site using specialized tests available through several plant diagnostic companies.

Weeds can also be infected with CMV, although they usually have no symptoms. Infected weeds in production areas are a source from which the virus can spread. Good weed control, especially of perennial weeds, is important. Aphid populations should be controlled to limit potential insect vectors.
Mottling on lily Cucumber mosaic virus
Mottling on lily. Symptoms vary widel and can resemble herbicide injury.
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