Large blackberry aphid

blackberries. Damage symptoms High populations of large blackberry aphids can reduce yield. Life cycle and appearance of Large blackberry aphid Aphids have a complex [...] . The aphids overwinter as eggs on blackberry plants. After emerging in spring, the aphids mainly feed on the underside of leaves and start to reproduce [...] complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes place by parthenogenesis

Pear psylla

bark of pear trees. The adults become active in spring and start to feed on young leaves and flowers. Eggs are deposited in crevices of the bark of twigs [...] season may affect the harvest of the next year by weakening or killing fruit buds. Pear psyllas excrete large amounts of honeydew. Sooty moulds often grow [...] appearance of Pear psylla Adults pear psyllas are 2-3 mm long and orange red to blackish. They have white, longitudinal stripes on the back of the thorax

Macrocheles robustulus

Macrocheles robustulus is also a soil-dwelling predatory mite, controlling eggs and larvae of flies , thrips pupae, nematodes and other soil living pests, which [...] used for the control of the following pests: Sciarid flies (fungus gnats) Thrips Lyprauta larvae The predatory mites feed on larvae of sciarid flies , thrips [...] insects. The mites appear in and on the soil and at the base of plant stems. Feeding behaviour of Macrocheles robustulus Predatory mites pierce their prey

Chrysoperla carnea

honeydew and most will fly out of the greenhouse. Life cycle of Chrysoperla carnea You can recognize the different life stages of the green lacewing, Chrysoperla [...] s. The larvae of green lacewings are particularly effective predators. The green lacewing Chrysoperla carnea is used for the control of the following pests: [...] behaviour of Chrysoperla carnea Lacewing larvae search for prey randomly on the plant. Their efficiency is seriously impaired by the presence of leaf hairs

Shore fly

scale that growth, particularly of young cuttings, can be retarded. Life cycle and appearance of Shore fly The life cycle of the shore fly ( Scatella tenuicosta [...] commonly, often in the vicinity of water. They feed on algae. Other shore fly species have diverse feeding habits but the larvae of most species feed on rotting [...] tenuicosta ) has the following stages: egg, three larval instars, a pupa and the adult fly. The eggs are laid singly and are bean-shaped. A first instar larva

Buckthorn-potato aphid

transmission of viruses. Life cycle and appearance of Buckthorn-potato aphid Aphids have a complex life cycle, with both winged and wingless forms of adults [...] The aphids overwinter as eggs on buckthorn. After emerging in spring, the aphids mainly feed on the underside of leaves of their summer hosts and start [...] n distribution and is a major pest of potatoes, where it also transmits viruses. It also attacks a large number of other crops, for instance sweet pepper

Leek moth

cream-coloured, silk cocoon made of characteristic meshes spun on the surface of the leaves or on the flower-stalk of the host plant. The pupa is 7-8 mm [...] with a wing span of 15-16 mm. Their general colour is grey-brown with a typical white triangle in the middle of the posterior edge of the forewings. The [...] found in some Asian countries and has been introduced to parts of Canada. The larvae of Acrolepiopsis assectella feed on cultivated Allium species, primarily

Crane flies

General The larvae of crane flies , called leatherjackets, live in the soil and feed on roots and shoots (which they pull into the ground of mainly grasses [...] causes brown spots in grasslands, turf and cereal fields. Exit holes of the burrows of the larvae might also be visible. Secondary damage may come from birds [...] appearance of Crane flies Adult crane flies are large flies with females reaching 45-50 mm across. They have long, spindly legs and one pair of narrow, clear

Koppert One

evaluates the harmfulness of various pesticides, considering both direct impacts like mortality or hindered development from eggs or pupae, as well as indirect [...] Side Effects app Understand the impact of pesticides on beneficial organisms and pollinators Pesticides can have both direct and indirect effects on natural [...] indirect effects such as reduced fertility (egg laying), problems with regard to moulting, or a repellent effect. The data within this database serves as

Circular scale

spots with paler margins, on both surfaces of shaded leaves of the host plant. Life cycle and appearance of Circular scale Female nymphs and adults have [...] tropical and subtropical parts of the world, mostly in association with the citrus industry. In more northern countries of its range, it occurs in greenhouses [...] stems and trunks, and may cause yellowing of leaves, premature leaf and fruit drop, and stem dieback. First signs of an infestation are dark-purple to red