• False spider mites

  flat compared to other mites. Most species that cause damage to cultivated plants belong to the genera Brevipalpus and Tenuipalpus . The most common species [...] found on the underside of leaves where they cause a brown, scabby discolouration spreading from both sides of the main vein into the leaf blade. The damage [...] damage often leads to premature ageing of the plant. In some crops, plants can become misshapen, presumably because the mites secrete a substance while feeding

• Roots Growers positive about Mycotal against whitefly

  therefore need to leverage the full potential of biological plant protection.’ To combat greenhouse whitefly , Roots Growers uses Koppert’s Enermix (the parasitic [...] theoretically spray everything in the greenhouse to death during crop rotation, so that the new crop starts off “clean”. But given the lack of effective products [...] year, Sam talked to Koppert consultants and decided to compare the effectiveness of three biological products against whitefly . Among the products, which

• Cotton aphid

  therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the crop and its [...] including the cucumber mosaic virus. Nymphs and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s [...] plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season, the death of young plants. Retarded growth

• Large blackberry aphid

  host specific the host plant is the simplest method to distinguish these two species. The large blackberry aphid is widely distributed in Europe and also [...] siphunculi. The cauda is short and triangular. The aphids overwinter as eggs on blackberry plants. After emerging in spring, the aphids mainly feed on the underside [...] General The large blackberry aphid, Amphorophora rubi , is very similar to the large raspberry aphid Amphorophora idaei . As both aphid species are host

• Garden chafer

  females that stay close to the ground. Females start to deposit eggs into the soil at a depth up to 5 cm soon after mating. The eggs elongate at laying [...] Garden chafer The life cycle of the garden chafer ( Phyllopertha horticola ) has the following stages: egg, 3 larval instars, a pupal instar and the adult beetle [...] of which the middle and hind pairs are approximately the same length. Pupation takes place around March or April. The pupae are cream-coloured to light brown

• Large raspberry aphid

  that are high enough to reduce yield by direct feeding damage. The major problem is the spreading of various raspberry viruses by the aphids. Life cycle [...] in spring, the aphids mainly feed on the underside of leaves and start to reproduce parthenogenetically. They are very mobile and drop from the plant when [...] skin, betraying their presence in the crop. Wingless females of the large raspberry aphid are 2.6-4.1 mm long, pale to yellowish green with long antennae

• Blackcurrant aphid

  spinal stripe. The distal third of the siphunculi is slightly swollen. In spring, the blackcurrant aphid lives on the underside of the young leaves of [...] each moult they shed white skin, betraying their presence in the crop. Wingless females of the blackcurrant aphid are 1.3-2.6 mm long and pale greenish white [...] gall on blackcurrant. In June, it migrates to hemp nettle and other Lamiaceae where it curls and rolls the young leaves. Some populations do not migrate

• Rose aphid

  presence in the crop. Wingless females of the rose aphid are 1.7-3.6 mm long and green or deep pink to red-brown. The antennae and sometimes the head is dark [...] dark in colour. The siphunculi are black and bent outwards. The rose aphid usually overwinters on rose bushes in the egg stage, although in mild winter [...] covered by aphids. In summer, winged aphids spread the infestation to other rose plants and sometimes also to secondary hosts. Colonies are often present on

• Buckthorn-potato aphid

  their presence in the crop. Wingless females of the buckthorn- potato aphid are 1.1-2.4 mm long and bright pale green to yellowish green. The antenna are relatively [...] barely exceed half the body length. The aphids overwinter as eggs on buckthorn. After emerging in spring, the aphids mainly feed on the underside of leaves [...] parts of the plants and are not very mobile. In autumn, winged males and females are produced, which return to the primary host buckthorn where they lay eggs

• Blueberry aphid

  white skin, betraying their presence in the crop. Wingless females of the blueberry aphid are pale yellow-green. The siphunculi are long and straight. Blueberry [...] blueberry bushes. The fundatrices (founding mothers) emerging from the eggs produce wingless and winged parthenogenic females which then continue to produce females [...] General The blueberry aphid, Ericaphis fimbriata or Ericaphis scammelli , is most likely of North American origin and was probably introduced into Europe