Pea blight, leaf and pod spot

symptoms Ascochyta pisi causes spots on leaves, stems and pods of peas. The spots on leaves and pods are round, on the stems they are more elongated. The [...] dark brown to red-brown border. The first infection is often on the primary leaves. The fungus is seed borne and thus also causes post- and pre-emergence [...] 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

Fusarium spp.

mycelium cells) or mycelium. Survival is also possible on seed, greenhouse structures, tools and machinery. Primary infection is either seed-borne or takes place [...] Fusarium spp. 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 [...] oxysporum ( Fusarium wilt ) is the species that causes vascular wilt. Initially, the leaves turn yellow and wilt, mostly on one side of the plant. Finally

Fusarium wilt

the soil and on crop residues of infected plants as chlamydospores (thick walled mycelium cells) or mycelium. Survival is also possible on seed, greenhouse [...] 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 [...] post-harvest decay. Fusarium oxysporum is the species causing vascular wilt. First the leaves turn yellow and wilt, mostly on one side of the plant. Finally,

Downy mildew of rose

germination free water is required. For most downy mildews, the optimum temperature is around 15 °C. The closer the temperature is to these 15 °C , the shorter [...] General Peronospora sparsa is a plant pathogen that causes plant diseases, such as downy mildew of rose and diseases on blackberries, raspberries and other [...] 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

Botrytis

common symptoms are grey-brown lesions. The lesions occur on leaves, stems, fruits and flowers. On flowers, usually small round specks occur first, called [...] may or may not grow into larger grey-brown lesions. The symptoms on fruits, flowers and on various parts of potted plants often only become visible during [...] humidity (RH > 93%) on dry plants. The germ tube grows into the plant. Grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) is a necrotrophic fungus

False codling moth

Thaumatotibia leucotreta ) is native to sub-Saharan Africa and is found in all citrus production areas in Southern Africa. It also occurs on some of the Indian [...] a leucotreta . The reason for this pest’s high pest status is its quarantine status and is not due to the economic losses. Damage and symptoms Larval [...] around the penetration hole eventually assumes a yellow colour. On ripe fruit this area is orange, but eventually becomes sunken and brown as the damage

Phytophthora blight

growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] infection is either by germinating sporangia or by zoospores produced in the sporangia. For germination on above-ground plant parts, leaf wetness is required [...] General Late blight (Phytophthora infestans f.sp. infestans) is also known as Phytophthora blight, tomato blight, early / late blight tomato, potato blight

Bacterial wilt, brown rot

adventitious roots on the stem. The vascular stem tissue is coloured brown and when the stem is cut, bacterial slime oozes from the wound. This is the way to [...] irrigation water. Disease incidence is highest when soil moisture is high, such as during rainy periods. When temperature is low, infection may remain latent [...] General Ralstonia solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot

Angular leaf spot

fragariae is a leaf spot disease found in strawberry. Damage symptoms Xanthomonas fragariae initially causes small, water-soaked lesions on the underside [...] veins. The distinctive feature is the way the lesions look when using different light sources: when reflected light is used, the lesions look dark green [...] but when transmitted light is used, they are translucent. When conditions are humid, a viscous bacterial exudate forms on the underside of the leaf. This

Cottony soft rot

the naked eye and look like rat droppings. The symptoms may occur on stems but also on leaves, fruits and pods. Root infection often leads to premature [...] usually only mycelium is produced by the germinating sclerotia. The fungus grows quite rapidly inside the plant and kills the host cells. On the infected plant [...] General Sclerotinia sclerotiorum, also known as cottony soft root, is a plant pathogenic fungus. It has a very wide range of host plants. Damage symptoms