• Shallot aphid

  cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes place by parthenogenesis, with unfertilized [...] shortened and leaves curled and twisted. Blossom trusses are also affected, fruits remain small and yield is reduced. On bulbs and shallot, the aphids often [...] generations of females. Aphids moult four times before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Wingless

• Phytophthora blight

  tubers, leaves and fruits. Late blight or Phytophthora blight (Phytophtora infestans f.sp. infestans ) causes water-soaked lesions with vague borders and [...] and white fluffy fungal growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling [...] the overwintering structures which infect the host. Zoospores are spores with flagellae which enable them to move through water. Infection is usually from

• Thrips

  in length. They have a distinctive elongated shape, with long, narrow wings that are fringed with fine hairs. Color: Thrips can be a variety of colors [...] by loss of chlorophyll. With a serious infestation the leaves themselves can shrivel, and there can be varying levels of fruit damage depending on the [...] Their feeding and virus transmission cause leaf deformation, silvering and fruit damage, leading to reduced yield and marketability. Because they reproduce

• Onion thrips

  are inserted into the plant tissue with a saw-like ovipositor. Larvae are light to yellowish green in colour, with a large head and bright red eyes. The [...] tabaci) is found mostly along the main leaf veins, with most damage evident where these veins join. Fruit damage, for instance in cucumber, only occurs if [...] and pupal instars can be recognized by their developing wing buds. Compared with the prepupa, the pupa has longer, more developed wing buds and longer antennae

• Leaf miners

  this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces yield. In full-grown plants of fruiting vegetable crops, however, [...] Sticky traps help monitor adult activity and support timely intervention. With Koppert’s biological solutions for leaf miners, professional growers can [...] tunnels. Feeding spots made by adult females can also reduce yield, although with the exception of ornamental crops, this is usually of less significance.

• Fusarium wilt

  General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species [...] Fusarium fungi cause vascular wilt, root rot, foot and stem rot, leaf lesions, fruit rot, head blight in cereals and post-harvest decay. Fusarium oxysporum is [...] cultivars Use clean propagation materials (seed can be treated effectively with hot water) Use clean substrate in greenhouse crops Disinfect tools, machinery

• Early blight

  lesions with a yellow halo restricted by leaf veins. Lesions can easily rupture. Other symptoms are brown lesions on stem and foot. On fruits, dark sunken [...] quite warm and humid conditions. Infection may take place within a few hours, with lesions occurring as rapidly as two to three days later and sporulation within

• Spider mites and other mites

  small that they cannot be seen with the naked eye and only have four legs. Tarsonemid mites cannot also not be seen with the naked eye but have eight legs [...] quality of fruits and vegetables. Broad mite damage Broad mites cause a distinct type of damage known as "bronzing", which can be confused with damage caused [...] this activity by seeking out mite hotspots and reducing outbreaks quickly. With Koppert’s biological solutions for spider mites and other mites, professional

• Bugs

  extensive damage to greenhouse and field crops by feeding on plant tissues and fruits, leading to deformation, discoloration, and yield loss. Effective bug control [...] help monitor, attract and eliminate harmful bugs in different crop stages. With Koppert’s biological solutions for bugs, professional growers can protect [...] damage Phytophagous bugs damage plants by puncturing leaves and growing points with their piercing-sucking mouthparts and extracting nutrients from them, resulting

• Glasshouse potato aphid

  is, with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood. With each [...] the glasshouse potato aphid (Aulacorthum solani) pierces the leaves or the fruit of sweet pepper it secretes a toxic substance, which leads to deformations [...] piercing of the lower leaves in the crop can cause deformed growth above with lumpy leaves and curled leaf margins. The immediate effects of piercing by