• Tomato leaf miner

  January 1, 1970

  ovipositor, usually in the upper side of the leaf. Egg spots are oval and hard to distinguish from feeding spots. Larvae of Liriomyza bryoniae are transparent [...] roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate [...] Europe and northern Asia. In warmer regions, the insect is found outdoors but in temperate regions it only occurs in greenhouses. The tomato leaf miner

• Aphids

  January 1, 1970

  to plants in several ways, and the damage can vary depending on the species of aphid and the type of plant being attacked. The following are common signs [...] leaves, stems, and flowers by piercing the plant tissue and sucking out the sap. This can result in stunted growth, curling or distortion of the leaves, yellowing [...] mating occurs and eggs are laid, the life cycle is termed holocyclic (complete). In greenhouses, however, the alternation of host plant and egg-laying may

• Predatory mites

  January 1, 1970

  deutonymphal and adult stages the mites feed almost continuously. Protonymphs and deutonymphs are similar to the adults in appearance, but smaller in size. Predatory [...] pesticides. Koppert is the pioneer in the development of predatory mite solutions, starting in 1967 with the rearing of the predatory mite Phytoseiulus [...] mites, food, and carrier materials. The mites breed within the sachets and subsequently disperse into the crop. These release sachets are constructed from

• American serpentine leaf miner

  January 1, 1970

  , usually in the upper side of the leaf. Egg spots are oval and hard to distinguish from feeding spots. The larvae of Liriomyza trifolii are entirely [...] roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate [...] indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature leaf-fall and cosmetic damage. In tropical

• Lyprauta

  January 1, 1970

  reddish. The pupae are white to yellow and embedded in a dense web. Adult flies are long and slender and have a dark brown head with short antennae. The thorax [...] brownish-yellow and the abdomen brown with yellow stripes. The wings are transparent light brown with clearly visible veins and spots. The keroplatid larvae [...] which are small earthworms of the family Enchytraeidae. Damage symptoms The symptoms are superficial damage on roots. Especially the root tips are affected

• Black rot of carrots

  January 1, 1970

  General The only known stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary [...] crop rotation, in particular when spores surviving in the soil are the main source of infection. Especially wheat and barley reduce the number of surviving [...] Alternaria causes spots on leaves, petals and stems. These spots can be distinguished by the dark and brown concentric rings that are caused by sporulation

• Black bean aphid

  January 1, 1970

  presence in the crop. The black bean aphid is dark olive green to black with black bands across the back. The two cornicles (or siphunculi) are short and usually [...] contaminating fruit and ornamental crops. At the same time, photosynthesis in the leaves is reduced, affecting production. Life cycle and appearance of Black [...] through the transmission of plant viruses. Infestations start usually at the younger parts of the plant but can spread all over the plant. Nymphs and adults

• Diglyphus isaea

  January 1, 1970

  from the mine. This is also seen in the pillars that remain visible as black spots in the leaf. The adult is metallic green to black in colour and unlike [...] usually pupates in the mine some distance from the dead host. Pupal stage: The pupa lies between the upper and lower epidermis of the leaf which are held apart [...] Diglyphus isaea The parasitic wasp Diglyphus isaea is available in a bottle ( Miglyphus ). Release parasitic wasps between the leaves of the crop in the morning

• Cabbage moth

  January 1, 1970

  marking in the middle. The hindwings are light brown with a rather inconspicuous spot in the middle. Head and thorax are grey-brown with white spots, and [...] and the abdomen is a pale, greyish brown. The moth flies only at dawn and dusk, hiding in the crop during the day. Several days after emerging from their [...] to black. In younger instars, the relatively large head capsule is conspicuous. In older instars, the lighter colour of the bands between the body segments

• Knowing & recognizing

  January 1, 1970

  how they spread in the crop, the damage they can cause, and specific behavioural characteristics. Shop now Koppert - A knowledge company The use of biological [...] edition of Knowing and recognizing also includes new biopesticides and biostimulants that increase the plant’s resilience to stress and help the plant to grow [...] pest’s lifecycle and its many phases, as well as giving you the ability to recognize the pest or disease you are up against by means of detailed illustrations