Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Salvia > Stunted plant
Salvia > Plant > Stunted plant
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Root Rot
Rhizoctonia solani and Pythium spp.
- Leaves turn yellow to tan and wilt
- Plants may be stunted
- The base of the stem may turn brown and crack
- Roots have brown to black sunken areas and lack root hairs
- The outer root tissue may be easily removed leaving behind thin, stringy root cores
- Disease common in cool, wet soil with poor drainage
- Lab test necessary to determine which pathogen is causing root rot
- More information on Pythium root rot
- More information on Rhizoctionia root rot
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Downy Mildew
Pernospora lamii
- Plants become yellow in color and stunted
- Large brown angular blotches may appear on leaves
- Leaves may curl slightly downward
- Grayish brown to purplish fungal growth can be found on underside of leaves in humid conditions
- Infected leaves prematurely drop from the plant leaving a barren stalk with few leaves
- Cool, wet weather favors disease
- More information on Downey mildew
