Pea blight, leaf and pod spot

lesions of stems, leaves, and pods (pea leaf spot and pea pod spot). Damage symptoms Ascochyta pisi causes spots on leaves, stems and pods of peas. The [...] stem base but is not part of the foot rot syndrome in peas. Infected seeds may have brown areas. Life cycle and appearance of Pea blight, leaf and pod spot [...] formed from which orange-red masses of two-celled conidia are exuded. Secondary infection is by splash dispersal of these conidia. There is no known sexual

Phytophthora blight

blight and late / early blight of potato. Damage symptoms Phytophthora causes root rot, seedling damping off and rot of stems, bulbs, tubers, leaves and [...] a period of mass starvation caused by this disease which ravaged potato crops throughout Europe during the 1840s. Life cycle and appearance of Phytophthora [...] water. Infection is usually from the root to the foot, but direct infection of the foot also occurs. Exudates leaking from growing root tips promote germination

Apple collar rot

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 [...] causes seedling damping off, a reduced root system and black discolouration of the roots. On the foot, dark brown lesions with sharp borders occur. Above [...] the heart leaves wilt first, then the whole plant. Life cycle and appearance of Apple collar rot Phytophthora species are very destructive organisms belonging

Apple scab

research that has been done on the influence of climatic conditions on release of ascospores and risk of infection, a decision support systems has been [...] noticed before harvest. Life cycle and appearance of Apple scab Venturia inaequalis overwinters in the form of unripe fruiting bodies in infected fallen leaves [...] infect the plant by direct penetration of the cuticula and then grow between the cuticula and the epidermis of the plant cells. This causes lesions, on

Bacterial spot

and crop debris Avoid waste piles in the vicinity of the greenhouse or field Resistant cultivars of pepper are available and should be used Prevent plant [...] leaves which are first round and become more angular as they grow. The centre of the lesions may fall out as they become drier. Under humid conditions, the [...] slightly raised from the leaf surface. They occur on the abaxial (underside of) leaf surfaces and may enlarge into dark brown lesions with a light brown

Bacterial soft rot, bacterial stem rot

when plants wilt at the time of first harvest or after that. The pith disintegrates and the stem becomes hollow. Because of the bacterial growth in the [...] carotovora has recently been renamed Pectobacterium carotovora . It is one of the pectolytic bacteria causing extensive bacterial rots (bacterial soft rot [...] becomes soft and lesion contents become liquid. Life cycle and appearance of Bacterial soft rot, bacterial stem rot Erwinia carotovora subsp. carotovora

Bacterial wilt, brown rot

very wide range of potential host plants. Damage symptoms In potato, field symptoms of Ralstonia solanacearum are wilting and yellowing of leaves and stunted [...] leaves are affected first. They show signs of wilting during the day which may disappear in the early stages of infection. Under conditions favourable for [...] l regions and is transferred by the introduction of propagation materials (seed potatoes, cuttings of ornamentals ) from warmer regions. Different races

Brown root rot, corky root rot

more and more destruction of the root system and subsequent loss of vigour and further wilting. Life cycle and appearance of Brown root rot, corky root [...] corky root rot. Damage symptoms The first signs of this disease, are poorly looking plants in localized areas of the greenhouse or field. The affected plants [...] plants may wilt. Also, interveinal chlorosis of leaves and premature defoliation may occur. Looking at the roots, there are three different symptoms. Small

Cottony soft rot

plant pathogenic fungus. It has a very wide range of host plants. Damage symptoms The first symptoms of a cottony soft root ( Sclerotinia sclerotiorum ) [...] Root infection often leads to premature wilting and death of plants. Life cycle and appearance of Cottony soft rot Cottony soft root ( Sclerotinia sclerotiorum [...] infection mostly take place at high soil water content over a prolonged period of time. The sclerotia germinate directly and form mycelium or produce apothecia

Crazy roots, hairy roots, crown gall

vegetative growth occurs. Life cycle and appearance of Crazy roots, hairy roots, crown gall The primary source of infection by Rhizobium rhizogenes has not yet [...] bacteria that fix nitrogen after becoming established inside root nodules of legumes. Additionally, pathogenic Agrobacterium s pecies have recently been [...] vitis, Agrobacterium rhizogenes and Agrobacterium rubi, n ow the first part of the name is changed to Rhizobium. Rhizobium rhizogenes or Rhizobium radiobacter