• Citrus mealybug

  rich in sugars, but low in proteins. In order to gain an adequate intake of protein, mealybugs must therefore ingest large quantities of sap, getting rid [...] host plants. In temperate regions of the world this mealybug poses a problem in greenhouse horticulture, and in the tropics and sub-tropics on outdoor crops [...] especially in fruit trees and ornamental crops, particularly in pot plants such as ficus, palms, schefflera, croton and kalanchoë, but also in roses and

• Horiver Rollertrap

  fungus gnats. Mode of action Insect pests are attracted to the colour of the sticky trap and get caught in the glue. Presentation Polyethylene ribbon coated [...] except for the 30 cm width which needs to be placed 40 cm above the crop To assist with placement, insert a rod or other expedient through the center opening [...] staples or clips. It may be necessary to secure the Rollertrap mid run to provide additional support. It is recommended to replace the Rollertrap after 10 months

• Cottony cushion scale

  scale, Icerya purchasi , is considered to have originated in Australia. It was accidentally introduced to California in about 1868 and devastated the citrus [...] world. It is also periodically discovered in greenhouses in temperate regions, but is not generally a pest in these situations. Damage symptoms Cottony [...] of dusky wings, The adult ‘females’ produce 500 to 2000 bright-red, oblong eggs over a period of 2 to 3 months. After leaving the egg sac, the crawlers

• Greenhouse whitefly

  can in turn influence the development of fruit and lead to a reduction in yield. The honeydew deposited on fruit makes it sticky. Dirt adheres to the fruit [...] population is very large, feeding on plant sap can affect the physiology of the plant, as a result of which growth is retarded. In full sunlight, leaves can wilt [...] encouraged, making it unsuitable for sale. In serious cases the fruit will rot. Sooty moulds also develop on the leaves, reducing photosynthesis and tr

• Horiver Drystick

  one Horiver Drystick per 200 m 2 For trapping in hotspots use one Horiver Drystick per 2 to 20 m 2 Notes In contrast to Horiver Wetstick , the glue of [...] Lygus spp. Mode of action Insect pests are attracted to the colour of the sticky trap and get caught in the glue. Presentation Polysterene cards coated with [...] Place traps in areas with high risk of pest infestation such as areas near doors, gable ends and lateral ventilation openings Attach traps to wires or sticks

• Tobacco aphid

  yield. Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The [...] The tobacco aphid tends to form denser colonies, closer to the top of the plant, than the peach potato aphid . It is not known to what extent tobacco aphids [...] great variety in colour. When reproduction is asexual, the young aphids are born as developed nymphs. They immediately start to feed on plant sap and grow

• Horiver Wetstick

  monitoring use one Horiver Wetstick per 200 m 2 For trapping in hotspots use one Horiver Wetstick per 2 to 20 m 2 For trapping Tuta absoluta use at least one [...] americanus Mode of action Insect pests are attracted to the colour of the sticky trap and get caught in the glue. Presentation Polysterene cards coated with [...] Place traps in areas with high risk of pest infestation such as areas near doors, gable ends and lateral ventilation openings Attach traps to wires or sticks

• Grape mealy bug

  due to infestation of growing points. Honey dew secretion of mealy bugs support sooty mould growth on infected area. Young vines often die due to severe [...] damage in grapes is minimal but the marketability is greatly affected due to its cottony egg mass, honey dew, sooty mould and dead mealy bugs on grape berries [...] bugs are found in crevices of stem, on leaves and berries. Mealy bugs are pinkish and covered with white mealy wax. Female lays 300-500 eggs in loose cottony

• Pierce's disease of grapevine

  plants to wilt. Transport to different plant parts depends on the plant species: in peach, bacteria are found in high numbers in the roots, whereas in plum [...] and the shoots get shorter internodes. Infected vines eventually die. This happens faster in younger vines than in older ones and faster in susceptible cultivars [...] Infection becomes systemic more rapidly in young trees than in older trees. In the latter, it may stay limited to certain branches. When the leaves mature

• Spidex Vital lives up to its promises

  Delissen and with what Koppert promised in the leaflet, he tells us. ‘Spidex Vital immediately gets to work on tackling spider mites and hot-spots, the [...] the weather conditions have been favourable up to now. But, he says, the summer is yet to come. ‘Later on in the season, air humidity will fall. Although [...] predatory mites are somewhat less keen on it. Spidex Vital still has to prove itself in such dry conditions. I want to see what happens. However, it is a new