• Bacterial canker of tomato

  tubers. This discolouration is round, hence the name ring rot. Life cycle and appearance of Bacterial canker of tomato Clavibacter is seed-borne and tuber-borne [...] General Clavibacter is a quarantine organism in Europe, which means that strong efforts are used to prevent the bacterium from entering. When the occasional [...] occasional infection is found, strict measures are taken to eradicate the infection. In tomato, growers must either destroy the infected crop entirely or,

• Angular leaf spot

  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 [...] General Xanthomonas fragariae is a leaf spot disease found in strawberry. Damage symptoms Xanthomonas fragariae initially causes small, water-soaked lesions [...] 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

• Bacterial soft rot, bacterial stem rot

  subsp. carotovora has recently been renamed Pectobacterium carotovora . It is one of the pectolytic bacteria causing extensive bacterial rots (bacterial [...] Pectobacterium carovora causes bacterial stem rot as well as soft rot. Stem rot is first noticed when plants wilt at the time of first harvest or after that [...] bacterial stem rot Erwinia carotovora subsp. carotovora or Pectobacterium carovora is very common, but does not often reach epidemic population densities. It can

• Dwarf bunt

  General Tilletia controversa is a plant pathogen. It is a fungus known to cause the smut disease TCK smut in soft white and hard red winter wheats, as [...] some or on all spikelets, showing the bunt (smut spore) they contain, which is larger than a normal kernel. The bunt balls are grey-brown. They rupture at [...] suitable host for as long as ten years. Seed-borne transmission does occur, but is less important from an epidemiological point of view. The teliospores germinate

• Crazy roots, hairy roots, crown gall

  yet been defined. The assumption is that the bacteria survive in the soil, but it is possible that first infection is from the propagation material. Infection [...] Agrobacterium rhizogenes and Agrobacterium rubi, n ow the first part of the name is changed to Rhizobium. Rhizobium rhizogenes or Rhizobium radiobacter causes [...] tumours on underground plant parts and on the crown. Furthermore, infection is characterized by excessive root growth (crazy roots). In greenhouse vegetables

• Rophoria

  your situation. Environmental conditions Rophoria is most effective between 20 and 30°C. High humidity is favourable for larval development and hatching of [...] consumed entirely, only skins remain. Dark excrements (meconium) on the leaves is an indicator of hoverfly larvae activity. Pack size 100 pupae Presentation

• Syrphidend

  situation. Environmental conditions Syrphidend is most effective between 15 and 23°C. High humidity is favourable for larval development and hatching of [...] consumed entirely, only skin remains. Dark excrements (meconium) on the leaves is an indicator of hoverfly larvae activity. Pack size 50 pupae. Presentation

• Grey mould

  General Grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) is a commonly found fungus in many environments. It survives in plant parts like bulbs [...] storage. In lettuce, grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) is part of the foot rot complex, which causes rotting of the foot and may cause [...] grows into the plant. Grey mould ( Botryotinia fuckeliana / Botrytis cinerea ) is a necrotrophic fungus, meaning that it excretes compounds that kill the plant

• Wheat bunt

  tritici and Tilletia laevis only differ in one gene and easily hybridize. There is debate whether they should indeed be considered separate species, since they [...] some or on all spikelets, showing the bunt (smut spore) they contain, which is larger than a normal kernel. The bunt balls are grey-brown. They rupture at [...] kernels, which in turn become a source of disease in the next season. Infection is strongly correlated to temperature and precipitation in the first 11 days

• Bacterial spot

  development is favoured by temperatures between 24 and 30 °C and high precipitation due to rain, fog or overhead irrigation. Infection is through stomata [...] General Xanthomonas vesicatoria is a bacterium that causes bacterial leaf spot on peppers and tomatoes. Damage symptoms Xanthomonas vesicatoria in tomato [...] stomata and wounds. The dispersal is in windblown water drops, mechanical means such as clipping and handling and aerosols. Many isolates are resistant to