Black bean aphid

caused through the transmission of plant viruses. Infestations start usually at the younger parts of the plant but can spread all over the plant. Nymphs [...] 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 fruit sticky [...] from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation

American serpentine leaf miner

exit hole in the leaf with its mouth parts. After roughly one hour the larva crawls out of the leaf and falls to the ground. This occurs in the early morning [...] for the identification of the species. Indirect damage arises when disease causing fungi or bacteria enter the plant tissue via the feeding spots. Life cycle [...] appearance of American serpentine leaf miner The life cycle of a leaf miner has the following stages: egg, three larval instars, a pupal instar and the adult

Broad mite

to the damage caused by viruses. The typical pattern of damage consists of malformation and distortion of the above-ground growth of the plant. The mites [...] General The broad mite (Polyphagotarsonemus latus) occurs in the tropics and in greenhouses in temperate regions. The broad mite (Polyphagotarsonemus latus) [...] appearance of Broad mite The life cycle of tarsonemid mites has the following stages: egg, larva, and adult. The larvae have three pairs of legs, adults

Tomato leaf miner

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 [...] Asia. In warmer regions, the insect is found outdoors but in temperate regions it only occurs in greenhouses. The tomato leaf miner has been found in greenhouses [...] bacteria enter the plant tissue via the feeding spots. Life cycle and appearance of Tomato leaf miner The life cycle of a leaf miner has the following stages:

European red mite

generations in one year. The European red mite overwinters in the egg stage; the “winter eggs” are laid in the wooden parts of the host plants in autumn. [...] and appearance of European red mite The European red mite feeds mainly on the undersides of leaves but moves to upper leaf surfaces when the lower side becomes [...] spots (tubercles) at the base of the hairs; males are about 0.3 mm long, yellowish red, and more slender and tapered near the hind end. The development from

Limonica Ulti-Mite

Crops Do not use in tomato. Mode of action Predatory mites reproduce within the sachet and gradually disperse into the crop over a period of several weeks [...] have an exit hole Hold sachets by the cardboard strip at the top, to avoid damaging the predatory mites Dosage The dosage of Limonica Ulti-Mite depends on [...] Presentation Sachets in cardboard box. Carrier Millet husks, bran and sawdust. Application Hang sachets in sheltered locations in the crop, not exposed to

Onion thrips

patches on leaves and the black dots of their excreta indicate their presence in the crop. The vigour of the plant is reduced by loss of chlorophyll. When [...] eggs of the onion thrips (Thrips tabaci) are laid in leaves, flower petals and in the soft parts of stalks. They are inserted into the plant tissue with a [...] Larvae are light to yellowish green in colour, with a large head and bright red eyes. The colour of the adult depends on the food source. Onion thrips (Thrips

Buckthorn-potato aphid

half the body length. The aphids overwinter as eggs on buckthorn. After emerging in spring, the aphids mainly feed on the underside of leaves of their [...] usually found in the lower parts of the plants and are not very mobile. In autumn, winged males and females are produced, which return to the primary host [...] does not cause plant deformation. The major problem in potatoes is the transmission of viruses. Life cycle and appearance of Buckthorn-potato aphid Aphids

Crane flies

roots and crowns of grasses during the autumn.. Larvae overwinter in the soil, usually in the third instar stage. and start feeding again in spring. They become [...] General The larvae of crane flies , called leatherjackets, live in the soil and feed on roots and shoots (which they pull into the ground of mainly grasses [...] again and feed voraciously when the soil begins to warm up in spring. The larvae pupate below the soil surface in summer. The pupal stage lasts about two weeks

Lyprauta

appearance of Lyprauta The adults of the three species can be distinguished by the wing pattern of adults. Adults of P. trinidadensis have a variation of dar [...] root damage in potted orchids, especially in greenhouses in the Netherlands. Dutch farmers call these larvae potworms, however, they should not be confused [...] confused with the actual potworms which are small earthworms of the family Enchytraeidae. Damage symptoms The symptoms are superficial damage on roots. Especially