• An impressive range of predatory mite solutions thanks to continuous research and innovations

  September 3, 2024

  unchanged, and that is to work towards the better health of people and the planet; to help growers and optimize cultivation and reduce the impact on the [...] understanding and support. It has resulted in a huge quantity of knowledge and expertise that we share willingly with our customers and other agricultural [...] but by far the greatest achievement is that we have managed to improve and escalate the production, safe transportation and optimal application of our

• Next generation to lead family business Koppert

  November 18, 2021

  the next generation of leaders for the first time in over twenty years. CEOs Paul Koppert and Henri Oosthoek and CFO Robert Pathuis of the biological crop [...] board will assist the board in achieving the ambitions of the family business. With offices in thirty countries and a turnover of around 300 million euros [...] perseverance of the people who believe in our mission to improve the health of people and the planet in partnership with nature. With the same dedication,

• Grape downy mildew

  mildew or grapevine downy mildew, caused by Plasmopara viticola , is one of the most important diseases in wine and table grape production worldwide. The [...] spreads rapidly under warm and wet conditions, infecting leaves, shoots, and young berries, often resulting in severe yield and quality losses. Infections [...] monitoring of high-risk weather conditions are key to maintaining a healthy vineyard. Signs and damage symptoms of Grape downy mildew Symptoms of grape downy

• Powdery mildew

  production, so the net effect of the RH is very small. Wind and draught in greenhouses promote disease. In greenhouses, dispersal of spores over small distances [...] 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 [...] plant by entering through the stomata and there are more stomata on the underside of the leaf. On the upper side, yellow spots are noticeable. In case of

• Crazy roots, hairy roots, crown gall

  dispersed by rain and wind and by humans and tools. Until now, no bacteria have been isolated from crazy roots. This disease seems to be caused by a change [...] the substrate and in severe epidemics the drippers get clogged. In tomato, excessive vegetative growth occurs. Life cycle and appearance of Crazy roots, [...] change in the hormonal system of the plant resulting from the Rhizobium infection. Rhizobium rhizogenes puts a Ri-plasmid in the plant tissue and causes a

• Bacterial canker of tomato

  seedlings by touching the plants in greenhouse crops and by water in field crops, for example through splashes of rain or irrigation. Both in greenhouses [...] brown centre. In potato, the disease usually only occurs in the second half of the season. The first symptoms are wilting of the lower leaves and subsequent [...] the name ring rot. Life cycle and appearance of Bacterial canker of tomato Clavibacter is seed-borne and tuber-borne and primary infection is mostly from

• Gummy stem blight

  conidiospores by water drops, tools and hands of workers. The ascospores are the main source of dispersal of disease upwards in the crop and the conidia [...] after opening in areas suspected of disease (only feasible in high-wire crops) Pick and remove dead and diseased leaves Prevent plant diseases by optimizing [...] narrowing of the tip of the mature fruits. The symptoms on stems, leaves and inside the fruits may occur together or individually. Life cycle and appearance

• Black leg of seedlings

  symptom of a Pythium infection is the easy stripping of the skin from the root cortex with a finger nail. Life cycle and appearance of Black leg of seedlings [...] temperatures and causes among others cereal diseases. Damage symptoms Pythium affects roots, in particular those of seedlings. Infected plants lag in growth [...] irreversibly. In potted plants the flower buds fall off. The side roots rot and very little of the root system survives. On the border between air and soil or

• Downy mildew of Cucurbits

  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 turns [...] microclimate. Achieve this by lowering crop density, good aeration during propagation and maintaining a warm and dry climate in greenhouses. Use hygiene [...] grey-brown. This is actually the sporulation of the pathogens extruding from the stomata. Life cycle and appearance of Downy mildew Pathogens causing downy mildew

• Bacterial wilt, brown rot

  soil-inhabitant in tropical and subtropical regions and is transferred by the introduction of propagation materials (seed potatoes, cuttings of ornamentals [...] soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very wide range of potential host plants. Damage symptoms In potato, field [...] cycle and appearance of Bacterial wilt, brown rot Ralstonia solanacearum is a quarantine organism in Europe and considered a bioterrorist organism in the