• Obscure mealybug

  growth and causing deformation and / or yellowing of leaves, sometimes followed by defoliation. The overall effect is a reduction of photosynthesis and therefore [...] part of the stalk. These mealybugs can also cause damage in ornamental crops such as passiflora, pelargonium, and orchids. Pseudococcus viburni is difficult [...] mobile and known as ‘crawlers’. Second instar nymphs are darker and less active. From the second instar onwards the life cycle of males anf females is completely

• Silver-Y moth

  leaf epidermis and on the petiole, skeletonized leaves, accumulation of frass and destruction of growing points. Life cycle and appearance of Silver-Y moth [...] feeds on plants of 14 families and is sometimes also encountered in greenhouse crops such as sweet pepper, lettuce, beans, chrysanthemums and various other [...] along the margin. The body is light brown and hairy, the antennae are long and thin. The moths fly during the day as well as at night, often in large swarms

• Manual Growing lights

  climate regime, and day and night cycle can have an impact on the overall plant and flower quality and affect flower attractivity and pollination. 1.1 [...] at the end of the plant rows, to optimize pollination when daylight is at its minimum. The opening and closing system is pneumatic and is controlled by [...] general advice is to place the hives as high as possible (above the crop) in the greenhouse. Several placement systems can be used for this. It is also important

• False spider mites

  stages as spider mites: egg, larva, protonymph, deutonymph and adult. They move slowly and are mostly found along the veins on the underside of leaves [...] General Mites of the family Tenuipalpidae have a worldwide distribution and can be found on many cultivated plants. Several species have been reported [...] premature ageing of the plant. In some crops, plants can become misshapen, presumably because the mites secrete a substance while feeding, that is poisonous to

• Box tree moth

  include webbing of the branches with frass and residues of moulting such as black head capsules of different sizes. Life cycle and appearance of Box tree moth [...] perspectalis ) is an oligophagous species feeding on the leaves of box tree ( Buxus spp. ) species mainly. Severe defoliation can lead to the death of the tree [...] symptoms The larvae of the box tree moth ( Cydalima perspectalis ) feed on the leaves of box trees, but can also attack the bark of the trees, causing them

• Mottled arum aphid

  ms, Begonia and Fuchsia, and also sweet pepper. Damage symptoms Large colonies of mottled arum aphids can greatly reduce plant vigour and kill the plant [...] excellent substrate for the growth of black sooty mould. Large areas of mould covering the leaves can reduce photosynthesis and also result in an unattractive [...] plant through sucking of plant sap. However, also at lower densities the aphids can damage plants because they produce large amounts of honeydew, which provides

• Chrysopa-E

  Pests Aphids and other pests, like mealybugs , Echinothrips and eggs of pest lepidoptera species . Mode of action Larvae of the lacewing attack their prey [...] products) with carrier material Dosage The dosage of Chrysopa-E depends on climate, crop and pest density and should always be adjusted to the particular situation [...] in infested areas and repeated at weekly intervals until control is achieved. Consult a Koppert advisor or a recognised distributor of Koppert products

• Green peach aphid

  viruses and is thus rightfully feared by many growers. Nymphs and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result [...] The aphid’s saliva can induce strong “allergic” reactions such as malformations of the growing tips. Life cycle and appearance of green peach aphid Aphids [...] with both winged and wingless forms of adults and a great variety in colour. When reproduction is asexual, the young aphids are born as developed nymphs

• Encarsia formosa

  tissues of the host, leading to its death and thereby contributing to the reduction of whitefly numbers. Encarsia formosa is highly adaptable and can adjust [...] balance and reduce the reliance on chemical pesticides. Life cycle and appearance of Encarsia formosa The development of E. formosa consists of six stages: [...] brown in colour. The pupa of E. formosa is unique among the species of Encarsia , in that it is formed immediately beneath and in contact with the whitefly

• Shore fly

  lettuce and herbs also causes cosmetic damage, and sometimes this can occur on such a scale that growth, particularly of young cuttings, can be retarded [...] tenuicosta) do not attack plants directly, as they feed on green algae. However, they can transmit plant diseases and can be a nuisance to greenhouse works by [...] translucent and their body is cylindrical. The larvae are found in the top layer of damp soil, where they also pupate. The adult shore fly is black, about