• Pine processionary moth

  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 of the first-instar [...] 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 [...] on each body segment appear, arranged in pairs. The integument and hairs that clothe the body vary considerably with different provenances. In general

• Onion fly

  fly on the young leaves, necks of onion seedlings or in the soil close to the base of onion plants. The onion fly larvae that emerge from the eggs tunnel [...] with the right approach. Growers must carefully monitor the development of the onion fly. This way he knows when the first flight of the onion fly is coming [...] Then most onion fly larvae will die, and the pest pressure will remain low. Finally, the correct application of the nematodes is important. The soil must

• Tomato looper

  white marks on the forewing that sometimes overlap each other. The hindwings are brown. The body is brown and hairy and, when at rest, the hairy dorsal plume [...] five and therefore the caterpillar moves with the same looping motion as an inchworm (geometrid). The cocoon is usually attached to the underside of leaves [...] on tomato fruit, often in a bunch of ripening tomatoes, however, it can also be found in the soil. The pupa has a pale green body, with a dark brown ventral

• Knowing & recognizing

  s of the most prevalent pests, diseases and their natural enemies. This book provides the reader with the necessary information to understand the interaction [...] how they spread in the crop, the damage they can cause, and specific behavioural characteristics. Shop now Koppert - A knowledge company The use of biological [...] giving you the ability to recognize the pest or disease you are up against by means of detailed illustrations and close-up photographs. The knowledge gained

• Mealybugs and scales

  it. Ants are also 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. [...] unfit for sale, and the reduced level of photosynthesis in the leaves also reduces flower and fruit production; in ornamental crops, the mere presence of [...] stunting, and in extreme cases eventual defoliation. However, it is mainly the great quantity of honey-dew that causes the damage because of the sooty mould

• Fit roots for plant health Technical bulletin 2020 EN

  pattern in the slab. The composition of the nutrient solution in the root zone is frequently monitored by analysis. But only the composition of the plant [...] Evaporation is by far the most effective cooling mechanism of the plant. That is why the functioning of the roots is directly related to the plant’s energy [...] Strive to the right cation balance in the root zone that leads to the right balance in the plant sap. Check if high phosphate levels in the root zone do

• Long-tailed mealybug

  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 sexual or [...] mealybug The long-tailed mealy bug is easily recognized by the long, posterior tail filaments, which are at least the length of the body itself. The length [...] photosynthesis in the leaves also reduces flower and fruit production. In ornamental crops, the mere presence of mealybugs is sufficient to render the product

• Silver-Y moth

  feature is the irregular white mark. The hindwings are brown with a broad, dark band along the margin. The body is light brown and hairy, the antennae [...] roof-like above the body. The female lays up to 2,000 eggs on the underside of the leaves of their host plant, usually separately but sometimes in small groups [...] of this caterpillar is the oscillatory swaying movement of the anterior end. The caterpillars are nocturnal. When the caterpillar is full-grown, it will

• Vine mealybug

  from the pupa. The male is smaller (1 mm), dark orange in color with long tail filaments and transparent wings and has no mouthparts. The female is larger [...] shape and has no wings. The body is covered with a fine waxy material and have 18 pairs of wax rods round the edge of the body, and two slightly longer [...] defoliation. The overall effect is a reduction of photosynthesis and therefore the yield. Flowers and fruit often drop off. Plant sap is rich in sugars, but

• Chrysoperla carnea

  sometimes appear in groups when the population density is particularly high. The development of the pupa is visible externally. The outer cocoon is 8 mm long [...] plant or the rim of the pot, during daylight hours. The larvae grasp their prey from below and lift them in their jaws. The prey is injected with a salivary [...] effective predators. The green lacewing Chrysoperla carnea is used for the control of the following pests: Aphids Thrips Mealybugs Caterpillars The natural enemy