Integrated pest management resources for Michigan Michigan State University home IPM Michigan home
IPM Scouting in Herbaceous Perennials

Search
Resources
bulletChristmas trees
bulletField crops
bulletFruit
bulletHome and yard
bulletNursery and landscape
bulletTurfgrass
bulletVegetable

Related pest diagnostic/management programs
Diagnostic Services ● Soil/Plant Nutrient Lab ● Enviro-weather ●Regional IPM Center ● Pesticide safety ● Organic: New Ag Network ● Invasive species ●Sustainable ag & food systems

Organizations
MSU ANR departments ● MSU Extension ● Site index ●Contacts/permissions
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.

Red spot, measles
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.
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.
Email the web developer.
Updated 9/28/07