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| Red spot, measles | ||
| IPM scouting in herbaceous perennials > red spot, measles | ||
| Pathogen: Clado-sporium paeoniae. Hosts: Paeonia. Symptoms: Initial symptoms typically develop after bloom. Small, reddish, circular spots form on the foliage. Lesions may coalesce, making blotchy patches. The upper surfaces of infected leaves become dark purple; the lower surface is brown. Foliage that is infected before it is fully expanded may become slightly distorted. Infection of stems causes reddish streaks. |
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| Spread: This fungus survives on dead plant debris and in soil. Spores are spread by rain or wind. Management: Remove and destroy infected plant material. Avoid overhead irrigation or carefully time irrigation to limit the duration of leaf wetness. |
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| 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). | ||
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