• Glume blotch

  General Parastagonospora nodorum (Phaeosphaeria nodorum) is a fungal pathogen of wheat , barley and rye that induces yield and quality losses. Damage symptoms Phaeosphaeria nodorum or Septoria nodorum causes glume blotch, which presents itself as brown, elongated lesions with a light halo on leaves, stems and glumes. In the centre of the lesions, light-coloured translucent pycnidia (fruiting bodies) with new spores occur. The lesions may merge,

• Grey mould

  General Grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) is a commonly found fungus in many environments. It survives in plant parts like bulbs and crop residues or as sclerotia (drought- and cold-resistant structures) in the soil. Damage symptoms As the name suggests, grey mould’s ( Botryotinia fuckeliana / Botrytis cinerea ) most common symptoms are grey-brown lesions. The lesions occur on leaves, stems, fruits and flowers. On flowers, usually

• Downy mildew of rose

  General Peronospora sparsa is a plant pathogen that causes plant diseases, such as downy mildew of rose and diseases on blackberries, raspberries and other Rubus species. Damage symptoms Downy mildew pathogens infect mostly the leaves but occasionally also stems and fruits. They cause lesions on the upper leaf surface, bordered by the veins, which are first yellow and then turn brown. On the underside of the leaf fluffy growth appears which is

• Downy mildew of Cucurbits

  General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops like cucumber, cantaloupe, pumpkin, watermelon and squash. Damage symptoms Downy mildew pathogens infect mostly the leaves but occasionally also stems and fruits. They cause lesions on the upper leaf surface, bordered by the veins, which are first yellow and then turn brown. On the underside of the leave fluffy growth appears which is first white and later

• Phytophthora blight

  General Late blight (Phytophthora infestans f.sp. infestans) is also known as Phytophthora blight, tomato blight, early / late blight tomato, potato blight and late / early blight of potato. Damage symptoms Phytophthora causes root rot, seedling damping off and rot of stems, bulbs, tubers, leaves and fruits. Late blight or Phytophthora blight (Phytophtora infestans f.sp. infestans ) causes water-soaked lesions with vague borders and white fluffy

• Fusarium wilt

  General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species are considered weak pathogens and can only infect wounded or stressed host plants. Damage symptoms Fusarium fungi cause vascular wilt, root rot, foot and stem rot, leaf lesions, fruit rot, head blight in cereals and post-harvest decay. Fusarium oxysporum is the species causing vascular wilt. First

• 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 similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost on the upper side of the leaf. In severe epidemics in cereals, the ears may also be infected. In pepper, the fluffy colonies occur mostly on the underside

• Blight of pepper

  General Phytophthora capsici is an oomycete plant pathogen that causes blight and fruit rot of peppers and other important commercial crops. Damage symptoms Phytophthora causes root rot, seedling damping off and rot of stems, bulbs, tubers, leaves and fruits. Several Phytophthora species cause root- and crown rot in potted plants. The small roots die and brown-black lesions occur on the larger roots. Plants wilt and the crown leaves drop off. Life

• 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 several years, up to eight years for several Alternaria spp. Typically, Alternaria causes early blight of potato and early blight of tomato, which presents itself as spots on leaves, petals and stems. These spots can be distinguished by the dark and

• Southern blight

  General Grey rot or southern blight is a disease caused by the fungus Sclerotium rolfsii (Athelia rolfsii) . It is an important plant pathogen that inhabits the soil, and is responsible for root and stem rot, wilting and damping-off of seedlings. It has a wide range of hosts, around 500 botanical species, including dicotyledons and monocotyledons, distributed in all agricultural regions, predominantly in tropical and subtropical areas, where