Diseases
Powdery mildew of carrot
Daucus carota L.
The term "Oidium" when applied to carrots is a non-standard designation for powdery mildew caused by the pathogen Erysiphe heraclei or, in rare cases, Oidiopsis taurica. The disease manifests as a white coating on the leaves, leading to chlorosis, premature senescence, and the stunting of root crop…
In the reference 4 varieties crop Carrot, where this is mentioned in the description.
The primary pathogen of carrot powdery mildew is the fungus Erysiphe heraclei, while the term "Oidium" may be mistakenly used in regions where the fungus Leveillula taurica occurs, whose anamorphic stage is called Oidiopsis taurica. The disease affects the aerial parts of the plant, including leaves, petioles, and flower stalks.
Initial symptoms appear as a whitish coating that eventually turns gray and spreads across the entire leaf blade. As the infection progresses, the lower leaves turn yellow, curl, and become brittle. In affected plants, root growth slows down, leaving the roots small with a coarse texture.
In agronomic practice, there is no systematized data on pathogen races or specific resistance genes to this pathogen in carrots. Breeding of cultivars is conducted mainly by selecting genotypes that exhibit field tolerance to the complex of powdery mildew fungi.
General information about the subject — on the page Powdery mildew.
Varieties of Carrot mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
No varieties yet.