Onion fly

What is Onion fly? The onion fly ( Delia antiqua ), also referred to as the onion maggot, is a frequent pest that harms allium plants, including leek, [...] and onion crops. It is a small fly, measuring between 5 and 7 mm long, with a grayish-yellowish body and clear wings. The eggs are laid by the female onion [...] onion 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

Goat moth

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 trees. It is widespread [...] widespread in Europe. Damage symptoms Feeding galleries are very extensive and the larvae burrow in all directions in both sap and hart wood. Attacks are [...] are usually confined to the trunk of mature tress. Sap frequently exudes from the bark of attacked trees. The larvae emit an unpleasant goat-like smell. Trees

Psyllids

Hemp russet mite

russet mite ( Aculops cannabicola ) belongs to the family Eriophyidae (gall and rust mites). It does not produce galls but lives freely (vagrant) on hemp/cannabis [...] cannabicola is host specific to hemp/cannabis ( Cannabis sativa ). It cannot survive on other plants. Damage symptoms Damage is caused by the mites sucking [...] 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 populations are

Horse-chestnut leaf miner

Cameraria ohridella , probably originates from natural stands of the European horse-chestnut in Greece, Albania and Macedonia. It was first observed attacking [...] attacking ornamental horse-chestnut trees in Macedonia in the 1970s, from where it spread to most of Europe. Since then, in all invaded regions, outbreaks have [...] causing aesthetic damage to horse-chestnut, one of the favourite ornamental trees in European cities. Damage symptoms Larvae of the horse-chestnut leaf

May beetle

Although this subfamily contains a number of species which cause damage to crops, the most representative genus is the Phyllophaga . Given the external physical [...] larvae of this genus, they are usually treated as a single group, sharing similar habits and biology. The larval stages of these beetles are harmful to crops [...] feed on plant roots, resulting in visible water stress and ultimately ending in the death of the plant. From the third stage onwards, the impact of this

Blackcurrant aphid

Cryptomyzus galeopsidis , attacks black currant and also red current. It is widespread throughout Europe and also present in the Russian Far East and [...] America. Damage symptoms Blackcurrant aphids produce large amounts of sticky honeydew on which black sooty mould fungi grow. Leaves and fruit quickly turn [...] 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

Leafhoppers

Biological control of leafhoppers Leafhoppers are highly mobile, sap-sucking pests that feed on plant leaves, causing discoloration, stippling and leaf [...] growth and can lead to reduced yield and lower crop quality. In addition, leafhoppers can transmit plant pathogens, increasing the risk of disease spread within [...] field crops. Effective leafhopper control is therefore essential to maintain healthy and productive cultivation. By combining monitoring with targeted biological

False spider mites

General Mites of the family Tenuipalpidae have a worldwide distribution and can be found on many cultivated plants. Several species have been reported [...] reported, especially by growers of greenhouse ornamentals . Tenuipalpidae are known as false spider mites because they closely resemble spider mites (family T [...] Tetranychidae ) or as flat mites because their body is rather flat compared to other mites. Most species that cause damage to cultivated plants belong to the genera

Shallot aphid

ascalonicus , is extremely polyphagous. It feeds on crops such as onions, shallots, strawberries, lettuce, brassicas and potatoes and many ornamentals . The shallot [...] shallot aphid is cosmopolitan and widely spread in Europe. Damage symptoms Feeding of shallot aphid on strawberries invokes a strong host plant reaction [...] starts in spring. Petioles are shortened and leaves curled and twisted. Blossom trusses are also affected, fruits remain small and yield is reduced. On bulbs