Thielaviopsis basicola

Pathogen: Thielaviopsis basicola

Hosts Include: Digitalis, Gaillardia, Geranium, Lathyrus, Lupinus, Pachysandra, Phlox, and Viola.

Symptoms: Stunting, yellowing, and plant death. Symptoms are often mistaken for nutrient deficiency symptoms.

Spread: Thielaviopsis basicola produces spores that can persist for long periods of time in soil or on infested pots and equipment. Reusing infested equipment is a common source of disease. Fungus gnats and shore flies can vector spores.

Management: Do no reuse plug trays, flats or pots for susceptible crops. Keep good records of the production areas where there have been problems with T. basicola. Avoid growing susceptible crops in these areas for several years. Fungicide drenches should be used to protect very susceptible plants from infection.

Digitalis-yellowed-from-Thielaviopsis-infection-300x200

Root-rot-symptoms-on-Digitalis-300x291

Geranium-infected-with-Thielaviopsis-basicola-200x300

Thielaviopsis-basicola-conidia-on-roots-298x300


For more information visit:

Plant & Pest Diagnostics

Other Documents in this Series

Michigan State University Michigan State University Close Menu button Menu and Search button Open Close