Phytophthora erythroseptica—also known as pink rot along with several other species of Phytophthora—is a plant pathogen. It infects potatoes (Solanum tuberosum) causing their tubers to turn pink and damages leaves. It also infects tulips (Tulipa) damaging their leaves and shoots.

Several species from the genus Phytophthora are believed to be involved in causing pink rot-like diseases.

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