Harrell's Compendium of Tropical Plant Diseases & Disorders

TROPICAL PLANTS COMMONLY AFFLICTED BY PYTHIUM DISEASES

MANAGEMENT RECOMMENDATION

Host

Disease

Host

Disease

African violet

Root and stem rot

Leatherleaf fern

Root rot

Aglaonema

Root and stem rot

Peperomia

Root rot

Aloe

Root and stem rot

Philodendron

Root rot

Areca palm

Root rot

Poinsettia

Root rot

+ M onitor irrigation to avoid saturated conditions.

Begonia

Root rot

Pothos

Cutting rot

Caladium

Root and corm rot

Rosemary

Root rot

Thoroughly clean and disinfest pots and avoid reusing potting medium. Get an accurate diagnosis as many root and stem rot diseases can look alike and not all fungicides will be effective against Pythium. + Some cuttings may be infected with Pythium without showing symptoms.

Dieffenbachia

Root rot

Snapdragon

Crown rot

Echeveria

Root and crown rot

Umbrella tree

Damping-off

Fatsia

Root rot

Zebra plant

Root rot

FUNGICIDES FOR CONTROLLING DISEASES OF PYTHIUM

Common Name

Tradename

FRAC Group

mefenoxam

4

Subdue Maxx ®

phosphonates

P07

Aliette ® , TitlePhyte ®

fenamidone

11

FenStop ®

strobilurin

11

Fame ® , Empress ® , Heritage ®

etridiazole

14

Terrazole ® , Truban ®

cyazofamid

21

Cyazo, Segway ® O

fluopicolide

43

Adorn ®

Follow the product label and rotate between FRAC groups to reduce resistanace development

Reach out to your Harrell’s rep for more information.

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