• Black currant

  January 1, 1970

  About The black currant ( Ribes nigrum ) is a woody shrub and the plant is well known for its savory berries. It belongs to the family of Grossulariaceae [...] eae . The black currant originally comes from the milder regions of both central and northern Europe and northern Asia. The plants grows well in damp and [...] and fertile soils. During summer, clusters of small and glossy black berries appear along the stems. These can be picked by hand or by machine. The berries

• Black tea thrips

  January 1, 1970

  covered with small droplets of black excrement from the thrips. Life cycle and appearance of Black tea thrips Adult black tea thrips are dark brown with [...] General The black tea thrips , Heliothrips haemorrhoidalis , is widely distributed in the tropics and subtropics; it also occurs in greenhouses of temperate [...] avocado, as well as cyclamen and many other ornamentals . Damage symptoms The black tea thrips feeds primarily on the foliage of ornamental plants. It attacks

• Black vine weevil

  January 1, 1970

  value of ornamental plants. Life cycle and appearance of Black vine weevil The life cycle of the black vine weevil consists of an egg, 6 or 7 larval instars [...] General The black vine weevil, Otiorhynchus sulcatus, is a pest in many ornamental crops (e.g. rhododendron, cyclamen and azalea), as well as in strawberries [...] weevils appear around May. They are approximately 7 - 10 mm long, brownish black and have dull yellow spots on their back. The wing covers are grooved and

• Black bean aphid

  January 1, 1970

  skin, betraying their presence in the crop. The black bean aphid is dark olive green to black with black bands across the back. The two cornicles (or s [...] General The black bean aphid, Aphis fabae , is widespread in temperate regions, where it is a serious economic pest of beans. It is highly polyphagous [...] attacks a wide range of other crops. Damage symptoms Economic damage by black bean aphid is mainly due to direct feeding damage. Indirect damage is caused

• Black root rot of cucurbits

  January 1, 1970

  pathogen infecting cucurbits, causing black root rot of cucurbits. Damage symptoms Phomopsis sclerotioides causes grey-black spots with a dark demarcation line [...] grow and encircle the root. The roots become yellow-brown to black and ultimately die. Black lesions with fruiting bodies occur more commonly at temperatures [...] from other wilt diseases. The fungus can also cause black fruit rot. Life cycle and appearance of Black root rot of cucurbits Phomopsis sclerotioides survives

• Mottled arum aphid

  January 1, 1970

  green with black cross bands behind the head, broken along the midline, and a large horseshoe-shaped spot on the back of the abdomen. These black markings [...] amounts of honeydew, which provides an excellent substrate for the growth of black sooty mould. Large areas of mould covering the leaves can reduce photosynthesis [...] same background colour as their parents, but they lack the characteristic black markings.

• Cabbage moth

  January 1, 1970

  Cabbage moth The adult cabbage moth (Mamestra brassicae) has grey-brown to black forewings, with a kidney-shaped white-rimmed marking in the middle. The hindwings [...] initially light and translucent, becoming steadily darker until they are a brown-black or sometimes even a purple colour. They are ridged and have a light network [...] youngest a transparent yellow to grey-green with a characteristic brown-black head capsule. After the third moult, the caterpillar is green with a dark

• Common asparagus beetle

  January 1, 1970

  shiny blue head, black antennae and a red thorax. The elytra have two distinctive rows of white or yellow spots. Eggs are oval and black to greenish brown [...] leaves of the asparagus plants. Larvae are dark grey to whitish, have small black heads and three pairs of stout, light brown legs. When fully grown, the larvae

• Blackcurrant aphid

  January 1, 1970

  large amounts of sticky honeydew on which black sooty mould fungi grow. Leaves and fruit quickly turn black and fruit can become unmarketable. Life cycle [...] General The blackcurrant aphid, Cryptomyzus galeopsidis , attacks black currant and also red current. It is widespread throughout Europe and also present

• Macrolophus pygmaeus

  January 1, 1970

  bugs are green except for occasional small black markings: the first antennal segment is black, and a black stripe runs behind the eyes. The first part [...] Macrolophus pygmaeus adults are small, slender predatory bugs with distinctive black markings, while the nymphs are pale green with red eyes. Both adults and [...] part of the forewings is a transparent, soft green with a small black spot in the middle. The hind part is colourless with a vague brown marking. Macrolophus