Diseases

Cercospora Leaf Blight of Carrot

Daucus carota L.

A fungal disease caused by the pathogen Cercospora carotae, which affects the aerial parts of carrot plants. It leads to necrosis of leaves and petioles, resulting in reduced yield and deformation of root crops.

In the reference 64 varieties crop Carrot, where this is mentioned in the description.

The causal agent of the disease is the fungus Cercospora carotae (Pass.) Solheim. The disease manifests on the leaves as small, circular or oval spots that are light brown with a straw-colored center and a dark border. Primary symptoms often appear on the petioles and leaf margins, causing them to curl and subsequently die off.

Under high humidity conditions, a grayish conidial sporulation layer forms on the underside of the leaves. Although the fungus does not infect the root crops directly, severe infestation of the foliage leads to the formation of small, deformed roots and complicates mechanized harvesting due to increased brittleness of the petioles. Unlike Alternaria blight, Cercospora leaf blight often develops on young, actively growing leaves.

General information about the subject — on the page Cercospora leaf spot.

Sources8

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.