Violet root rot

Violet root rot
Carrots showing violet root rot
Scientific Classification
Kingdom:	Fungi
Phylum:	Basidiomycota
Class:	Urediniomycetes
Subclass:	Incertae sedis
Order:	Helicobasidiales
Family:	Helicobasidiaceae
Genus:	Helicobasidium
Species:	Helicobasidium brebissonii
Synonyms
Corticium sanguineum var. lilacinum Helicobasidium purpureum Hypochnus purpureus Protonema brebissonii Rhizoctonia asparagi Rhizoctonia crocorum Rhizoctonia medicaginis Rhizoctonia rubiae Rhizoctonia violacea Rhizoctonia violacea f. dauci Sclerotium crocorum Thanatophytum crocorum Tuber parasiticum

Violet root rot (Helicobasidium brebissonii) is a plant pathogen found mainly in carrots.

Symptoms

Characteristic root symptoms are soil clinging to partially rotten, leathery textured roots. The leathery root surface will be a purplish or violet colour.

Prevention

Avoid infected areas, rotate grain crops, ensure good drainage and nutrition and, most importantly, reduce the spread of infected soil on tools.