Bacterial spot

General Xanthomonas vesicatoria is a bacterium that causes bacterial leaf spot on peppers and tomatoes. Damage symptoms Xanthomonas vesicatoria in tomato causes small, water-soaked spots on leaves whi

Leaf stripe

General Pyrenophora graminea is a disease of Barley that causes significant yield losses. Damage symptoms Symptoms first occur on the first, second and third leaf and subsequently on other leaves. Yel

Loose smut of barley

Ustilago nuda (Ustilago segetum var. nuda, Ustilago nuda f.sp. hordei) Loose smut of barley General Ustilago nuda f.sp. hordei affects barley and can destroy a large proportion of the crop. It is also

Early blight

General The only known stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary infection of the leaves. Survival can be

Pea blight, leaf and pod spot

General Ascochyta pisi is a fungal plant pathogen that causes A scochyta blight on pea (leaf blight or pea blight) and lesions of stems, leaves, and pods (pea leaf spot and pea pod spot). Damage sympt

Glume blotch

General Parastagonospora nodorum (Phaeosphaeria nodorum) is a fungal pathogen of wheat , barley and ryethat induces yield and quality losses. Damage symptoms Phaeosphaeria nodorum or Septoria nodorum

Bacterial soft rot, bacterial stem rot

General Erwinia carotovora subsp. carotovora has recently been renamed Pectobacterium carotovora . It is one of the pectolytic bacteria causing extensive bacterial rots (bacterial soft rot, bacterial

Wheat bunt

General Tilletia tritici and Tilletia laevis only differ in one gene and easily hybridize. There is debate whether they should indeed be considered separate species, since they cause the exact same sy

Damping-off

General Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a sub-optimal condition or suffer from stress, caused for example by too much water, too hig

Powdery mildew

General Powdery mildew is a fungal disease that is caused by many different species of fungi such as Erysiphe, Podosphaera, Oïdium, Leveillula. Damage symptoms Powdery mildew symptoms are fairly simil