Fungicide for Root Rot

Updated February 21, 2017

A plant infected with the contagious, deadly fungus known as root rot requires prompt treatment with a fungicidal solution.

Root Rot

According to the Burke's Backyard website, phytophthora, or root rot, can easily spread from plant to plant. A plant dying from root rot may wilt and grow yellow, and its roots may turn brittle, loosening the plant's hold on the soil.


Fongarid has served as the traditional fungicide for the treatment of root rot. This chemical's disadvantages include its relatively high price and possible toxicity.

Phosphorus-Based Fungicides

Fungicides that use phosphorus can treat or even prevent root rot. These fungicides break down harmlessly into phosphate and may even bolster plants' natural defences against the disease.

Contaminated Pots

The University of Minnesota Extension Service advises that a pot contaminated by root rot should soak in a 10 per cent solution of bleach for half an hour before it hosts new soil and plants.


While phosphorus-based fungicides pose no known toxic threat, Burke's Backyard recommends always washing your hands after you apply it and to keep it away from your eyes or skin.

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