Pepino mosaic virus

greenhouse are therefore essential. The most effective way to prevent symptoms of PepMV is cross protection. With this technology, the plants are purposely [...] typically cause less losses than when the infection takes place when the plants are heavily laden. Typical of the damage caused by PepMV is, that it is very intense [...] year, with 50-60% non-marketable fruits. Moreover, some tomato varieties are more susceptible to quality losses due to PepMV than others and climate also

Working at Koppert

continues to expand, we are keen to draw people who will play a role in its further growth. At Koppert, we work together. Who We Are Koppert Biological Systems [...] Everyone who works at our company agrees: At Koppert Biological Systems, you are regarded as an individual and an important key player in our continued success [...] the company, Koppert has developed an internal career policy. New vacancies are preferably filled internally. Koppert feels it is important that its staff

Precautionary measures for product allergies

ry measures Depending on the way in which you are exposed to the substances in these products, there are specific precautionary measures you can take: [...] predatory mites , feeder mites, and supplementary feeding products. If you are not allergic, but come into close and prolonged contact with certain substances [...] reactions caused by the type of products mentioned above. Which products are of concern? This concerns the predatory mites , feeder mites, and supplementary

Biological seed treatment

substances are applied to the seed in a powder form or as a liquid. An even layer covers the whole seed. In this way, the beneficial ingredients are available [...] available to the seed when it requires them. What are the benefits of biological seed treatment? Biological seed treatment has beneficial effects on the growth [...] that both the nutritional value of the crop as well as production yields are boosted; Biological seed treatment reduces the use of agrochemicals which

Fusarium spp.

whole plant wilts. Other symptoms are brown discolouration of the xylem vessels, which can be seen when the stems are cut. In banana, whole plantations [...] pinkish-red as spores are formed. Ear infection decreases the baking quality of wheat and brewing qualities of barley. Furthermore, mycotoxins are produced, of [...] Fusarium is widespread and can infect a range of host crops. Many species are considered weak pathogens and can only infect wounded or stressed host plants

Powdery mildew

stomata. Conidia are the main means of dispersal. They are dispersed by wind, as are the ascospores. In general, powdery mildew fungi are not very resistant [...] Damage symptoms Powdery mildew symptoms are fairly similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost [...] 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 a severe epidemic

Rhizoctonia solani

soil upward, therefore the lowest plant parts are infected first. Plants that are generally growing well are less susceptible. Optimum temperature for infection [...] different AG’s are more or less specific to the pathogenicity of different host groups. Not all isolates are pathogenic, many isolates are purely saprophytic [...] ‘anastomosis groups (AG’s)’ are distinguished. When two hyphae of Thanatephorus cucumeris meet, two different reactions are possible. Hyphae from the same

Black leg of seedlings

subsequently zoospores are produced. Zoospores are spores with flagellae, which enable the spores to move through water. The zoospores are chemically drawn to [...] where the side roots are formed or through other similarly damaged spots. On the infected plant, new sporangia with zoospores are formed, that allow the [...] (>70%) water content of the soil or substrate. Oospores are dispersed when soil particles are moved around by humans or machinery. Pythium can survive

Downy mildew of Cucurbits

structures are protruding from the stomata. Because there are more stomata on the underside of the leaf, this is where most fluffy symptoms are found. How [...] From these oospores or surviving mycelium sporangia are formed, structures in which zoospores are produced. However, in downy mildews, sporangia often [...] 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 leave fluffy growth

Bacterial wilt, brown rot

plants. Damage symptoms In potato, field symptoms of Ralstonia solanacearum are wilting and yellowing of leaves and stunted plants. Inside, vascular browning [...] of plants happens rapidly. Leaves remain green after wilting, until they are completely desiccated. Infected stems show long, dark brown streaks. The vascular [...] not seen in Clavibacter -infected plants. In tomato, the youngest leaves are affected first. They show signs of wilting during the day which may disappear