Apple collar rot

General Phytophthora cactorum is a plant pathogen that causes root rot, rhizome rot of strawberry, apple rot, apple collar rot and crown rot. It has an extremely wide host range. Damage symptoms Phyto

Brown root rot, corky root rot

General Pyrenochaeta lycopersici is a fungal plant pathogen, infecting tomatoes and aubergine. It causes brown root rot and corky root rot. Damage symptoms The first signs of this disease, are poorly

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

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

Black leg of seedlings

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

Angular leaf spot

General Xanthomonas fragariae is a leaf spot disease found in strawberry. Damage symptoms Xanthomonas fragariae initially causes small, water-soaked lesions on the underside of the leaf. They enlarge

Verticillium wilt

General Verticillium species are non-specific plant pathogens. Many species are saprophytes, V erticillium albo-atrum and Verticillium dahlia e are the most important plant pathogens. Verticillium dah

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

Black rot of carrots

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

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