• Sciarid flies

  . Lycoriella species are mainly found in commercial mushroom cultivation where they can cause enormous damage. Sciarid flies are usually found in damp [...] little, plant death is generally local. Young plants that are kept humid and well-watered are particularly at risk. Life cycle and appearance of Sciarid [...] hardly feed at all during their short life. The males are usually smaller than the females. They are not fast fliers, and prefer damp areas in dark places

• Black tea thrips

  and males are rare. The adults are poor fliers and tend to remain in the shaded areas on the plant. The eggs are white and banana-shaped and are inserted [...] with the apex of the abdomen paler; females are 1.4-1.7 mm long and males are 1.1-1.2 mm long. The legs are entirely white or yellow. The greenhouse thrips [...] leaves are covered with small droplets of black excrement from the thrips. Life cycle and appearance of Black tea thrips Adult black tea thrips are dark

• Pear psylla

  pear psyllas are 2-3 mm long and orange red to blackish. They have white, longitudinal stripes on the back of the thorax. Their forewings are clear with [...] with dark veins. The eggs are oval, approximately 0.3 mm long and yellowish orange in colour. The nymphs are initially yellowish with clearly visible purplish-red [...] young leaves and flowers. Eggs are deposited in crevices of the bark of twigs and hatch after about 3 weeks. There are 5 nymphal instars which feed on

• Black root rot of cucurbits

  spots with a dark demarcation line on cucumber roots. The lesions are slightly sunken and are mostly formed around the point of attachment of lateral roots [...] commonly at temperatures of approximately 20 °C whereas at 10 °C the lesions are light-brown. The lesions can be enclosed by pseudostromata: dark coloured

• False spider mites

  spider mites ( Tenuipalpidae ) are brick-red to yellow in colour. They have the same body shape as spider mites but are usually smaller. The different [...] deutonymph and adult. They move slowly and are mostly found along the veins on the underside of leaves. The mites are flattened and egg-shaped when seen from [...] dorsal surface showing a net-like pattern. The eggs are a clear red colour and elliptical in shape. They are laid in a fold in the leaf or along the mid-vein

• Oleander aphid

  (apterae) are yellow with black cornicles, antennae, legs, and cauda (tip of abdomen). Nymphs are similar to apterae in appearance except that they are smaller [...] the adult aphids are all female and males do not exist. Adult females may be winged or wingless. The winged adult females (alata) are yellow and black [...] mm in length. Females are viviparous and parthenogenetic, meaning that they deposit nymphs rather than eggs and that the progeny are clones of the adult

• Shallot aphid

  stunted when growth starts in spring. Petioles are shortened and leaves curled and twisted. Blossom trusses are also affected, fruits remain small and yield [...] Wingless females of the shallot aphid are 1.1-2.2 mm long and shiny brownish green to dirty yellow. Their legs and antennae are pale, apart from the ends of the [...] build up even in winter and early spring when temperatures are still low. Winged forms are produced and migrate to other crops until June.

• Cutworms

  circular position. Pupa are brown to dark brown and 17-25 mm long. Females are capable of laying several hundred eggs. There are six to seven larval stages [...] General Cutworms ( Agrotis spp.) are occurring worldwide. Important species are for instance the black cutworm Agrotis ipsilon and the turnip moth Agrotis [...] thorax is covered with close-lying hairs. The eggs are white at first but rapidly turn darker. They are laid separately or in batches on the ground, or on

• Obscure mealybug

  instar nymphs are yellow-brown and not yet covered with wax. They are actively mobile and known as ‘crawlers’. Second instar nymphs are darker and less [...] layer of wax, the filaments around the body are longer (20-50% of the body size) and the two tail filaments are always markedly longer than the others. The [...] nymphal instar onwards are covered with a white waxy material in the form of powder, threads, spiky projections or platelets. Eggs are laid in a sticky, foamy

• Click beetles

  appearance of Click beetles Adult Agriotis sp. are 6-10 mm long and yellowish brown to black. The eggs are laid in May or June in groups in the soil. They [...] start to feed on roots. The larvae (‘wireworms’) are long, thin, cylindrical and though skinned. They are up to 25 mm long and usually shiny yellowish brown [...] General Click beetles are elongate beetles with a hard exoskeleton, with the head deeply retracted into the thorax. When disturbed they lie on their back