Hemispherical scale

Saissetia coffeae , occurs widely in tropical regions and in greenhouses throughout the world. It is a severe pest in coffee and citrus. Many ornamental [...] undersides close to the midribs. They produce large amounts of honeydew causing build-up of sticky deposits on nearby surfaces. The honeydew may attract [...] leaves may drop prematurely. Life cycle and appearance of Hemispherical scale An adult female of S. coffeae has a hemispherical form with a smooth surface

Tomato leaf miner

damage. In (sub-)tropical areas this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces yield. In full-grown plants of fruiting [...] crop damage in many parts of the world, including North Africa, Europe and northern Asia. In warmer regions, the insect is found outdoors but in temperate [...] occurs in greenhouses. The tomato leaf miner has been found in greenhouses for decades, but has become a common pest since the 1960’s, particularly in sweet

Buckthorn-potato aphid

cause plant deformation. The major problem in potatoes is the transmission of viruses. Life cycle and appearance of Buckthorn-potato aphid Aphids have a complex [...] complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes place by parthenogenesis [...] overwinter as eggs on buckthorn. After emerging in spring, the aphids mainly feed on the underside of leaves of their summer hosts and start to reproduce p

Hemp russet mite

found on the underside of leaves. This results in smaller leaf size and suppressed bud growth leading to a reduction in the number of buds and dwarfed buds [...] quality. Other signs of damage include dull, greyish, or bronzed leaves and upward curling of leaf edges. Life cycle and appearance of Hemp russet mite All [...] caused by the mites sucking out the contents of plant cells. Hemp russet mite develops on the stems and petioles of the hemp plant and can cause stunting. When

Blackcurrant aphid

appearance of Blackcurrant aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses [...] The distal third of the siphunculi is slightly swollen. In spring, the blackcurrant aphid lives on the underside of the young leaves of currant plants. [...] Europe and also present in the Russian Far East and North America. Damage symptoms Blackcurrant aphids produce large amounts of sticky honeydew on which

Spotted Wing Drosophila

General Since the start of its invasion in 2008/2009, the spotted wing drosophila, which is originally from Asia, has spread extensively in North and South America [...] cycle and appearance of Spotted wing drosophila Adult spotted-wing drosophila are small, 2-3 mm in lengthg, and have a wingspan of 6-8 mm. Males are smaller [...] tubes which stick out of the fruit. There are three larval instars and in the third instar the larvae are about 3.9 mm long. The pupae of Drosophila suzukii

Zucchini

with a number of other varieties of squash and pumpkin, it belongs to the species of Cucurbita pepo . This species grows in tropical regions of all continents [...] continents, especially in Africa and South America. In addition, the courgette is very easy to grow in areas with a temperate climate. In the Netherlands, courgettes [...] courgettes are produced in greenhouses.

Olive scale

cosmopolitan pest of citrus and olives and occurs widely in tropical regions and in greenhouses throughout the world. It is a severe pest in coffee and citrus [...] Removal of large quantities of sap debilitate the plant and can cause wilting, desiccation of tissues and dieback. Life cycle and appearance of Olive scale [...] affected. Damage symptoms Olive scales produce large amounts of honeydew causing build-up of sticky deposits on nearby surfaces. The honeydew may attract

Blueberry aphid

appearance of Blueberry aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses [...] Damage symptoms Blueberry aphids live in dense colonies on young shoots of blueberry bushes and produce large amounts of sticky honeydew. The aphids spread [...] most likely of North American origin and was probably introduced into Europe with plant material. It feeds on blueberries and is a vector of blueberry scorch

Silver-Y moth

d leaves, accumulation of frass and destruction of growing points. Life cycle and appearance of Silver-Y moth The forewings of the silver-Y moth ( Autographa [...] appears in northern parts of Europe until November, migrating back to southern Europe for the winter months. The moths can fly 2,000 to 2,500 km. In temperate [...] female lays up to 2,000 eggs on the underside of the leaves of their host plant, usually separately but sometimes in small groups. These eggs are a greyish white