• Pine processionary moth

  mimics the pine shoots. The larvae develop through five instars and the full-grown caterpillar is about 40 mm in length. The head capsule is black. The body [...] enlarge until the fourth instar when the definitive winter nest is built. In general, this is situated at the branch tips in the upper part of the crown. At [...] but also during the following summer because of the persistence of allergenic hairs in the remains of winter nests The larvae of the Pine processionary

• Municipality Enschede: Entonem nematodes against oak processionary caterpillar

  The Municipality of Enschede started using nematodes for the first time in the spring of 2021 to try to halt the spread of the oak processionary caterpillar [...] caterpillar . The municipality’s built-up area has a total of 22,000 oak trees. In the past, the municipality only extracted the nests. But as Petra Klein Breukink [...] Breukink explains, it was not enough. She is the project manager of the oak processionary caterpillar for the Municipality of Enschede. ‘We use Koppert’s

• Goat moth

  larvae bore into the bark and down to the sap wood. Development takes 3 or 4 years. The larvae feed on the wood most of the time hibernating in their galleries [...] spines on the abdominal segment. The moths fly at night in June or July and lay eggs on tree trunks in batches of up to 50. After the eggs hatch, the larvae [...] General The goat moth ( Cossus cossus ), is a pest of broad-leafed trees. It is most often found in birch, ash, willow and elm but can also attack fruit

• Tobacco aphid

  through the crop by walking. The tobacco aphid tends to form denser colonies, closer to the top of the plant, than the peach potato aphid . It is not known [...] from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation [...] abdomen. There is a dark brown spot on the abdomen and several transverse black bands across the body. The antennae are 0.7-1.0 times the body length, reaching

• Carnation tortrix

  after dark. The females have a limited flight capacity and only cover short distances. The moth is rather small. The contrasting colours between the yellow [...] (with a dark brown band in the females and two red bands in the males) and the hindwings (bright orange) ensure that the moths of the species are easy to recognize [...] General The carnation tortrix ( Cacoecimorpha pronubana ) is a Mediterranean species belonging to the family of Tortricidae . It occurs in the Middle East

• Tobacco whitefly

  sugar, and the excess is excreted as honeydew, with larger larvae expelling large quantities. The damage that whiteflies cause to a crop is the result of [...] of sucking out the sap from the plant leaves and secreting honeydew. This can have the following consequences: If the population is very large, feeding [...] which the red eyes and white wings of the adult are already clearly visible. These pupae are found on the oldest leaves. The adult emerges from the pupa

• Black vine weevil

  It belongs to the family Curculionidae. Damage symptoms The major damage is caused by the feeding of the larvae on the roots. After the roots have been [...] 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 [...] planted cuttings. The adult beetles are only active at night, taking round bites out of the leaves, starting from the edge. This damage is usually not a problem

• Diamond back moth

  regions. Damage symptoms The caterpillar is a surface feeder. They feed from the lower leaf surface, leaving the wax layer on the upper surface intact, thereby [...] may occur in the florets. Initially, the pupa is pinkish-white to pinkish-yellow and changes to brown before adult emergence. The adult of the diamond back [...] (Plutella xylostella) is slender, greyish brown with pronounced antennae. The hindwings are narrow, pointed toward the apex. The tips of the wings appear to

• Glasshouse potato aphid

  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 [...] length exceeds that of the body. The legs are also long, there are two distinctive dark green spots on the abdomen at the base of the cornicles. Alate (winged) [...] shed white skin, betraying their presence in the crop. The wingless adult stage of the greenhouse potato aphid is rather squat, of medium size (1.8 - 3.0 mm

• Strawberry aphid

  on fragaefolii is one of the most serious pests affecting strawberry plants. Direct damage is caused by the aphids sucking sap from the plant, which reduces [...] reduces the yield and quality of fruit. The leaves do not become distorted but leaves and fruits quickly become sticky due to the honeydew the aphids excrete [...] General The strawberry aphid, Chaetosiphon fragaefolii , has a cosmopolitan distribution and is the most important aphid pest of strawberries. It can cause