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 [...] 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 [...] surrounded by a 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

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 [...] cause death of the plants. In cucumber and tomato the fungus causes lesions on pruning wounds. These lesions may encircle the stem, so the part of the plant

Fusarium spp.

the soil, and on crop residues of infected plants, as chlamydospores (thick walled mycelium cells) or mycelium. Survival is also possible on seed, greenhouse [...] that causes vascular wilt. Initially, the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts. Other symptoms are [...] (Fusarium head blight or scab) (anamorph/teleomorph) causes seedling damping-off . On the foot of the stem, brown discolouration occurs. Infected glumes and kernels

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 [...] species causing vascular wilt. First the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts. Other symptoms are [...] has many different formae speciales which are each selectively pathogenic on a limited number of crops. Even within one crop, different formae speciales

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 [...] base. The plant above it wilts and rots. White, fluffy fungal mycelium grows on the lesions, giving this disease its name cottony soft rot. In the mycelium [...] overwinters as sclerotia and mycelium in dead and living plant material in or on the ground. Sclerotia germinate at temperatures between 4 and 26 °C with an

Downy mildew of rose

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 [...] pathogen that causes plant diseases, such as downy mildew of rose and diseases on blackberries, raspberries and other Rubus species. Damage symptoms Downy mildew [...] is also infected in severe epidemics. In blackberry, red stripes may occur on the stems and petioles due to systemic infection. Early fruit infection may

Early blight

veins. Lesions can easily rupture. Other symptoms are brown lesions on stem and foot. On fruits, dark sunken, leathery lesions occur at the side of the stem [...] 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 [...] 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

Cyclamen mite

There are species that feed on fungi, algae, plants, as well as insect and mite predators and parasites. Those living on plants can cause considerable [...] pallidus ) can occur both on vegetable and ornamental crops. Damage symptoms The cyclamen mite ( Phytonemus pallidus ) feeds on plant sap by penetrating [...] localized patches, because the mite spreads very slowly. Symptoms vary depending on the host plant and can resemble the damage caused by viruses. Infested leaves

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 [...] germination and attract the zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia [...] germinating sporangia or by zoospores produced in the sporangia. For germination on above-ground plant parts, leaf wetness is required. Dispersal is by wind and

Angular leaf spot

symptoms Xanthomonas fragariae initially causes small, water-soaked lesions on the underside of the leaf. They enlarge to angular spots, often limited by [...] translucent. When conditions are humid, a viscous bacterial exudate forms on the underside of the leaf. This exudate changes to a white film when it dries [...] dries. Lesions may merge as they grow and later also become visible on the upper side of the leaf as irregular spots which are first reddish brown and then