• Woolly apple aphid

  January 1, 1970

  General The woolly aphid, Eriosoma lanigerum , is a serious worldwide apple pest. It is probably of North American origin and has been distributed to other [...] other parts of the world mainly via infested apple rootstocks. It can occasionally also be found in pear, quince and a few other woody Rosaceae. Damage [...] by masses of white, mealy wax. The siphunculi are pore-like and the cauda is small. Eriosoma lanigerum overwinters as “naked” nymphs (without wax covering)

• Neoseiulus californicus

  January 1, 1970

  californicus) is commonly used for biological pest control of spider mites . Although Neoseiulus californicus prefers spider mites it can also feed on [...] pollen. This predatory mite is more tolerant of higher temperatures, lower humidities and pesticides than Phytoseiulus persimilis . It can survive longer than [...] Neoseiulus californicus Neoseiulus californicus is a selective predator of Tetranychid mites, i.e. it prefers to feed on spider mites but can also feed

• Buckthorn-potato aphid

  January 1, 1970

  has a nearly cosmopolitan distribution and is a major pest of potatoes, where it also transmits viruses. It also attacks a large number of other crops [...] worldwide distribution. Damage symptoms Direct damage, caused by sucking of sap is rarely seen. Sometimes, large populations build up on potatoes or other hosts [...] potato aphid does not cause plant deformation. The major problem in potatoes is the transmission of viruses. Life cycle and appearance of Buckthorn-potato

• Municipality Venray: biological control of oak processionary caterpillars

  January 1, 1970

  benefit of Entonem is that nematodes kill fewer other caterpillars , which means they are less harmful to biodiversity. This is something that is high up on the [...] positive. ‘The trees that we have treated have been 90% cleared. What is interesting is that avenues running east to west are typically free of oak processionary [...] caterpillar, while those running north to south still have some nests. It is possible that there has been more drift during spraying in those places,

• Cotton aphid

  January 1, 1970

  kalanchoe. The cotton aphid ( Aphis gossypii ) is distributed throughout the world but prefers the warmer regions. It has been a pest in European greenhouses [...] sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black fungal moulds ( Cladosporium [...] General The cotton aphid ( Aphis gossypii ) is an extremely polyphagous aphid found on more than 700 plant species. Crop plants attacked by this aphid

• Hemp russet mite

  January 1, 1970

  e (gall and rust mites). It does not produce galls but lives freely (vagrant) on hemp/cannabis plants. Aculops cannabicola is host specific to hemp/cannabis [...] hemp/cannabis ( Cannabis sativa ). It cannot survive on other plants. Damage symptoms Damage is caused by the mites sucking out the contents of plant cells. Hemp

• 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

• Parasitoid wasps

  January 1, 1970

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

• 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

• 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