• Trianum effectively controls Pythium in cucumber

  Trianum, levels of Phythium have decreased dramatically. Up until 2019, there was a lot of damage and loss of production at the end of cultivation. Whole [...] cucumbers to some major retailers in the Netherlands and occasionally to customers in Germany. Thrips, spider mites, and whitefly larvae under control ‘I [...] developments in technology have gradually shifted my focus in terms of plant protection to biological methods. That’s why I now use fewer and fewer chemicals

• Understanding Orius

  July 12, 2024

  Thripor from the end of September to the end of March of the following year (between wk 39 and wk 12). However, they can be used year-round in greenhouses with [...] establishing. In pepper and eggplant flowers, the adults and older nymphs can easily be found in crop flowers, where they are feeding on thrips and pollen. Adults [...] short days (less than 14 hours) and cool temperatures. In Canada, in an unlit greenhouse, when using it preventatively and wanting them to establish, it

• 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

• 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

• Early blight

  stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary infection of the [...] three days later and sporulation within five days. Infection is both direct and through wounds and stomata. Spores are dispersed by wind and in some species [...] early 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

• 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

• Black rot of carrots

  direct and through wounds and stomata. Spores are dispersed by wind and in some species through the splash of rain. How to prevent Black rot of carrots [...] stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary infection of the [...] petals and stems. These spots can be distinguished by the dark and brown concentric rings that are caused by sporulation. Species may differ in specific

• Phytophthora blight

  tomato, potato blight and late / early blight of potato. Damage symptoms Phytophthora causes root rot, seedling damping off and rot of stems, bulbs, tubers [...] a period of mass starvation caused by this disease which ravaged potato crops throughout Europe during the 1840s. Life cycle and appearance of Phytophthora [...] optimal for crop growth. Phytophthora overwinters in roots, infected tubers and bulbs or in the soil in different stages: as oospores (sexual overwintering

• 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