• Horiver Rollertrap

  January 1, 1970

  secure with staples or clips. It may be necessary to secure the Rollertrap mid run to provide additional support. It is recommended to replace the Rollertrap [...] black and transparent Standard sizes: 5, 15 and 30 cm x 100 m 15 cm width is also available in lengths of 125, 150 and 500 m; other lengths on request [...] more easily. Application Place Rollertraps in areas where high pest pressure is expected, such as along gables, near ventilation windows and at (other) places

• Mealybugs and scales

  January 1, 1970

  defoliation. However, it is mainly the great quantity of honey-dew that causes the damage because of the sooty mould that grows on it. Ants are also attracted [...] attracted by the honeydew. In fact, the honeydew with its sooty mould is usually the first sign of the presence of this type of pest. Among ornamental crops [...] fruit quality and overall yield. Effective control of mealybugs and scales is essential to maintain healthy and marketable crops. Biological control of

• Parasitic wasps

  January 1, 1970

  Parasitization is the primary means by which parasitic wasps control pests in agriculture. This process involves the parasitic wasp laying its eggs inside [...] Once the parasitic wasp reaches maturity, it emerges from the host's body or the cocoon. The host pest is typically killed in the process. Host feeding [...] parasitic wasp larvae then develop inside the host insect, eventually killing it. These wasps are highly specialized, with different species targeting specific

• Pollination checklist tomato

  January 1, 1970

  active cooling. Position the hive so that it is easily visible both to the bumblebees and to people Ensure the hive is horizontal Protect the hive against [...] This is known as buzz pollination. The imprints of the bumblebee's jaw on the flower (bite marks) turn brown within one to four hours and make it possible [...] flower has been pollinated. The flower needs to have been pollinated before it closes. Depending on the conditions, a flower will remain open for one to

• Glasshouse potato aphid

  January 1, 1970

  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 [...] reproduction is asexual, the young aphids are born as developed nymphs. They immediately start to feed on plant sap and grow rapidly. When reproduction is sexual [...] adult stage of the greenhouse potato aphid is rather squat, of medium size (1.8 - 3.0 mm long) and oval in shape. It has a light yellow-green to brown-green

• Artificially lit crops pollination advice

  January 1, 1970

  During snowfall, orientation is seriously disturbed as snow reflects 90% of UV-light. When snow covers the greenhouse, it acts as an effective UV filter [...] only when there is sufficient daylight (e.g., between 10:00 a.m. and 3:00 p.m.). If the energy screen remains closed for a full day, it's better to close [...] their orientation. To prevent bumblebees from flying aimlessly in the crop, it is advised to turn off grow lights well before sunset to encourage their return

• Bacterial canker of tomato

  January 1, 1970

  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 [...] tuber-borne and primary infection is mostly from infected propagation material. It spreads to other seedlings by touching the plants in greenhouse crops and by [...] General Clavibacter is a quarantine organism in Europe, which means that strong efforts are used to prevent the bacterium from entering. When the occasional

• Rose aphid

  January 1, 1970

  General The rose aphid, Macrosiphum rosae , is a serious and often abundant pest of roses. It is virtually cosmopolitan and widely spread in Europe. Damage [...] long and green or deep pink to red-brown. The antennae and sometimes the head is dark in colour. The siphunculi are black and bent outwards. The rose aphid [...] are often present on rose bushes throughout autumn until their development is hampered by cold weather. In heated greenhouses they can be present year-round

• Protected vegetables

  January 1, 1970

  Understanding IPM IPM is a holistic and proactive strategy that goes beyond the conventional 'chemical-first' approach to pest control. It integrates various [...] necessary. Emphasizing Sustainability One of the fundamental principles of IPM is its commitment to sustainability. By reducing the reliance on chemical pesticides [...] Management (IPM) in vegetable cultivation Integrated Pest Management (IPM) is a comprehensive and sustainable approach to pest and disease management that

• Aphidend

  January 1, 1970

  significantly at higher temperatures. As gall-midges are active at night, it is crucial to keep the night temperature above 12°C/61°F, to ensure optimal [...] greenhouse Place the bottle directly on the soil or rockwool slabs or hang it in-between the plants Do not scatter the contents Once emerged, the adult [...] m2/release. Releases should be repeated at weekly intervals until control is achieved. Consult a Koppert advisor or a recognized distributor of Koppert