Diseases

Tomato Leaf Spots

Solanum lycopersicum L.

A group of tomato diseases caused by various pathogens, characterized by specific symptoms and resistance mechanisms.

In the reference 563 varieties crop Tomato, where this is mentioned in the description.

Leaf mold, caused by Fulvia fulva (Pf), manifests as rounded yellowish spots with a velvety coating on the underside of leaves. The pathogen has races 1.2, 1.2.3, 1.2.3.4, and breeding is conducted through the use of Cf resistance genes (Cf-2, Cf-4, Cf-9). Stemphylium leaf spot, caused by Stemphylium solani (Ss), S. lycopersici (Sl), and S. botryosum (Sbl), is characterized by small brown-black spots up to 3 mm in size with a yellow halo.

Bacterial spot (Pseudomonas syringae pv. tomato, Xanthomonas campestris pv. vesicatoria) manifests as black water-soaked spots, affecting stems and fruits. Resistance to it is provided by the Pto and Ptr1 genes. Early blight (Alternaria solani, A. tomatophila) is distinguished by concentric dark brown spots; it is characterized by polygenic resistance, unlike the gene-for-gene interaction seen in leaf mold.

General information about the subject — on the page Leaf spot diseases.

Sources8

Varieties of Tomato 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.

CHARGER (W-425)

Terminated

Solanum lycopersicum L. · Tomato

WESTERN SEED ESPAÑA, S.A.

1 record

Cherry Blossom

Application submitted

Solanum lycopersicum L. · Tomato

Frank Tardieu

2 records

Borivs`kyi

Active

Solanum lycopersicum L. · Tomato

Kovbasenko Raisa Vasylivna, Kovbasenko Kateryna Opanasivna, Kovbasenko Vasyl` Mykhailovych, Hubar Mykola Ivanovych, Horkutsenko Oleksandr Vasyl`ovych,

2 records