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Hollies (especially Ilex crenata ), Boxwood, and Citrus. Crops: Tobacco, Cotton, Carrots, and Lettuce.

In the quiet world of nursery production and home gardening, few pathogens are as persistent—or as devastating—as ( Berkeleyomyces basicola , formerly Thielaviopsis basicola ). This soil-borne fungus operates in the shadows, attacking the plant's foundation and turning healthy, white root systems into decayed, blackened messes, leading to stunted, wilted, or dead plants. The Anatomy of an Infestation

The Silent Killer: Understanding and Managing Black Root Rot

Pansy, Viola, Calibrachoa (Million Bells), Vinca, Petunia, Poinsettia, and Phlox.

Black Root Rot Fungus Apr 2026

Hollies (especially Ilex crenata ), Boxwood, and Citrus. Crops: Tobacco, Cotton, Carrots, and Lettuce.

In the quiet world of nursery production and home gardening, few pathogens are as persistent—or as devastating—as ( Berkeleyomyces basicola , formerly Thielaviopsis basicola ). This soil-borne fungus operates in the shadows, attacking the plant's foundation and turning healthy, white root systems into decayed, blackened messes, leading to stunted, wilted, or dead plants. The Anatomy of an Infestation black root rot fungus

The Silent Killer: Understanding and Managing Black Root Rot Hollies (especially Ilex crenata ), Boxwood, and Citrus

Pansy, Viola, Calibrachoa (Million Bells), Vinca, Petunia, Poinsettia, and Phlox. Hollies (especially Ilex crenata )