• Green peach aphid

  peach tree, is native, however it is now a pest with a world-wide distribution. The green peach aphid ( Myzus persicae subsp. persicae ) is a particularly [...] General The green peach aphid ( Myzus persicae subsp. persicae ) is an important insect pest in sweet pepper, tomato, cucumber and many other greenhouse crops [...] persicae subsp. persicae ) is the most important vector of viral diseases. It can transmit at least 100 different viruses and is thus rightfully feared by

• Glasshouse potato aphid

  to deformations in the growing tip of the plant. Precisely where the plant is pierced is unimportant. The piercing of the lower leaves in the crop can cause [...] presence in the crop. The wingless adult stage of the greenhouse potato aphid is rather squat, of medium size (1.8 - 3.0 mm long) and oval in shape. It [...] that has pale to dark transverse bands. The body shape is similar to wingless females, but is 2.0-3.0 mm long. The glasshouse potato aphid manifests both

• Black vine weevil

  sulcatus, is a pest in many ornamental crops (e.g. rhododendron, cyclamen and azalea), as well as in strawberries and other fruit crops in both temperate [...] approximately 12 mm. A larva is often curled into the typical C-shape which it assumes whenever it is disturbed. The body is covered with stiff white to [...] bites out of the leaves, starting from the edge. This damage is usually not a problem in vegetables and fruit crops but reduces the value of ornamental

• Long-tailed mealybug

  effect is a reduction of photosynthesis and therefore the yield. Flowers and fruit often drop off. Plant sap is rich in sugars, but low in proteins. In order [...] The length of the other filaments is roughly half the width of the body. The female is 3 - 4 mm long. Reproduction in Pseudococcus longispinus , may be [...] level of photosynthesis in the leaves also reduces flower and fruit production. In ornamental crops, the mere presence of mealybugs is sufficient to render

• Tobacco whitefly

  insect was first identified on tobacco in Greece in 1889, hence the name tabaci . It has subsequently been found in most tropical and subtropical countries [...] the 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 [...] crops. This is particularly important in ornamentals . The larvae inject enzymes into the plant that alter their normal physiological processes. In some host

• Diamond back moth

  xylostella) is suggested to have its origin in Europe, South Africa or East Asia, but is now present wherever its cruciferous hosts exist and it is considered [...] and frequently hide in crevices near the bud. In cauliflower and broccoli, pupation may occur in the florets. Initially, the pupa is pinkish-white to p [...] species. It is highly migratory and wind-borne adults can travel long distances to invade crops in other regions. Damage symptoms The caterpillar is a surface

• Codling moth

  overwinter and pupate in spring. Larvae still in the apples at harvest can often be found in cracks in apple boxes or other places in the store. [...] Cydia pomonella ) is a notorious, worldwide pest of apple and also occasionally of pear, quince, peach and other fruits. It is very common in Europe. Damage [...] flesh, leaving behind brown frass. The entry point is then greatly enlarged as the tissue beneath is eaten away. Infested fruits usually ripen prematurely

• May beetle

  aggressive. In early spring they either start feeding again or when the larvae are fully grown a kind of earthern cell is created in the ground in which they [...] very similar in terms of their external appearance. In short, the adults have a reddish-brown colour and grow to approximately 10 to 25 cm in size, depending [...] ly 5 to 7 cm in length. To differentiate between species, an examination of the position of the setae in their final abdominal segment is needed, although

• Brown soft scale

  brown soft scale Coccus hesperidum is very common in tropical and sub-tropical regions and is also a common pest in greenhouses throughout the world. C [...] soft scale The scale of the female is flat, usually an elongated oval shape, 3-4 mm long, yellow-green or light grey in colour, with dark brown speckles [...] produce enormous quantities of honeydew. This is usually the first visible symptom. Because of this, C. hesperidum is often attended by ants. The ants will clean

• Cotton aphid

  cotton aphid ( Aphis gossypii ) is distributed throughout the world but prefers the warmer regions. It has been a pest in European greenhouses since the [...] As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season, the death of young [...] young plants. Retarded growth and defoliation reduce yield. Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large