Glasshouse potato aphid

sweet pepper it secretes a toxic substance, which leads to deformations in the growing tip of the plant. Precisely where the plant is pierced is unimportant [...] with a brown head, a dark thorax and a dark abdomen that has pale to dark transverse bands. The body shape is similar to wingless females, but is 2.0-3 [...] aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When reproduction is asexual, the young

Working at Koppert

policy. New vacancies are preferably filled internally. Koppert feels it is important that its staff continue to develop and urges its employees to make use [...] The company is developing fast, so we are keen to draw people who will play a role in its further growth. There is much room for personal input from [...] employees have many opportunities to develop their careers. Koppert is recognized as a training company in many fields. To develop your career within the

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 wide [...] higher water content than is optimal for crop growth. Phytophthora overwinters in roots, infected tubers and bulbs or in the soil in different stages: as oospores [...] infection is either by germinating sporangia or by zoospores produced in the sporangia. For germination on above-ground plant parts, leaf wetness is required

Beneficial nematodes

bodies, and they come in a variety of sizes, ranging from microscopic to several inches in length. Nematodes play various roles in ecosystems. Some are [...] species is known for its effectiveness against pests such as wireworms, various caterpillars , and weevil and beetle larvae. Its ability to adapt to different [...] or plants but are highly effective in controlling harmful insects. Plant-parasitic nematodes Plant-parasitic nematodes are a group of parasitic nematodes

Bacterial canker of tomato

infection is mostly from infected propagation material. It spreads to other seedlings by touching the plants in greenhouse crops and by water in field crops [...] bacteria infect the new plants by entering through wounds and then growing into the vessels of the plant. Plant growth is inhibited and the plant wilts because [...] General Clavibacter is a quarantine organism in Europe, which means that strong efforts are used to prevent the bacterium from entering. When the occasional

Phytoseiulus persimilis

outbreak is quickly and effectively dealt with, but the disadvantage is that it disappears rapidly in the absence of suitable prey. When prey is in short [...] persimilis is sensitive to relative humidity below 70%. Phytoseiulus persimilis in bottles The predatory mite Phytoseiulus persimilis is available in a bottle [...] except for the resting period in the larval and nymphal stages. On plants, the oval eggs are usually deposited close to, or in a spider mite colony. They are

Pierce's disease of grapevine

causing the plants to wilt. Transport to different plant parts depends on the plant species: in peach, bacteria are found in high numbers in the roots, [...] fastidiosa is a gram-negative bacterium which is limited to xylem tissue. It has many hosts, many of which show minor or no symptoms. More and more plant species [...] plums): In peach, the canopy of infected plants is compact and umbrella-like due to the shorter internodes. The foliage is denser and the leaves are a darker

Apple scab

infection of new plant parts and spore production. In autumn, the fungus produces new pseudothecia in leaves that have already fallen off the trees. In response [...] and leaves may fall off prematurely. The plants’ defence mechanism is to produce corky rings around the lesions to prevent further invasion of tissue by the [...] response to the infection, the plants produce cork as a defence against further growth of the fungus. In cultivars that are more resistant, this happens faster

Downy mildew of Cucurbits

germination free water is required. For most downy mildews, the optimum temperature is around 15 o C and the closer the temperature is to this, the shorter [...] General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops like cucumber, cantaloupe, pumpkin, watermelon and squash [...] that is required. Inside the plant, the pathogens produce haustoria, small organs with which the pathogen can take up nutrients from the living plant cells

Biological Pest Control

or parasitoids, to control invasive pest species. This method is typically used when a new pest species poses a significant threat to agriculture or ecosystems [...] referred to as biocontrol, is a method of managing pests using natural predators, parasitoids, or pathogens. This approach partners with nature to maintain [...] friendly products, the demand for biological pest control methods is likely to grow, making it a forward-looking choice for agriculture and pest management.