Greenhouse whitefly

sap from the plant leaves and secreting honeydew. This can have the following consequences: If the population is very large, feeding on plant sap can affect [...] Brazil or Mexico. Hundreds of plant species from different families serve as suitable hosts for this whitefly. It occurs on many crops, including aubergine [...] moulds also develop on the leaves, reducing photosynthesis and transpiration. Viruses can be transmitted. The consumption of plant sap and secreting of

Early blight

Alternaria causes early blight of potato and early blight of tomato, which presents itself as spots on leaves, petals and stems. These spots can be distinguished [...] veins. Lesions can easily rupture. Other symptoms are brown lesions on stem and foot. On fruits, dark sunken, leathery lesions occur at the side of the stem [...] conducive to infection. In greenhouses: avoid high RH. Prevent plant diseases by optimizing plant potential and crop resilience.

Western flower thrips

occidentalis) can be found on a wide variety of plants, including many vegetable and ornamental crops in greenhouses, and on various weeds. It is an especially [...] resulting silver-grey 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 [...] Western flower thrips (Frankliniella occidentalis) prefer to feed on developing plant tissues such as growing tips and flower buds. When these tissues develop

Green peach aphid

in sweet pepper, tomato, cucumber and many other greenhouse crops. The aphid may originate from Asia, where its winter-hardy host plant, the peach tree [...] and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed [...] early enough in the season, the death of young plants. Retarded growth and defoliation reduce yield, Plant sap is rich in sugars, but has a low protein content

Glasshouse potato aphid

substance, which leads to deformations in the growing tip of the plant. Precisely where the plant is pierced is unimportant. The piercing of the lower leaves [...] young aphids are born as developed nymphs. They immediately start to feed on plant sap and grow rapidly. When reproduction is sexual, the aphids lay eggs [...] no alternation of hosts, and the two types of life cycles occur on the same host plant. The aphid can overwinter not only in greenhouses, but also outdoors

Fall Armyworm

of the host plant, depending on the crop, the stage of crop development, and the age of the larvae. On maize, young larvae usually feed on leaves, creating [...] too. The caterpillars of fall armyworms feed on the leaves, stems and reproductive parts of more than 100 plant species causing major damage to cultivated [...] They have a distinct white inverted Y-shaped mark on the front of the head and four large spots on the upper surface of the last segment. Pupae are reddish

Potato

‘potato’ ( S olanum tuberosum ) is used to refer to the plant itself or its edible tuber. The plant is an herbaceous perennial and came to Europe from Latin [...] rice. Potato plants grow up to some 60 cm tall. Its leaves die after flowering, fruiting and the development of the potatoes. The plant’s flowers vary [...] yellow stamens. After the flowering phase, the plants grow small, green fruits which look like cherry tomatoes and contain about 300 seeds each.

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, a [...] affected. The size of a leaf tunnel depends on the stage of development of the leaf, the species of host plant and the species of leaf miner. The older larvae [...] This is a family of small flies whose larvae tunnel into the leaves of plants, creating ‘mines’. There are many species of leaf miner affecting various

Aphids

host plants in the winter, and those species that do not. Species that alternate between host plants reproduce asexually on their summer host plant, migrating [...] ( tobacco aphid ) on various vegetable and ornamental crops. Aphis gossypii ( cotton aphid ), mainly on Cucurbitaceae, but also on chrysanthemums, and [...] ( potato aphid ), mainly on Solanaceae and various ornamental crops. Aulacorthum solani ( glasshouse potato aphid ), mainly on Solanaceae and various ornamental

Broad mite

There are species that feed on fungi, algae, plants, as well as insect and mite predators and parasites. Those living on plants can cause considerable damage [...] cork formation. When plants are severely attacked, the growing tip can be killed, plant growth stops and, in time, the whole plant dies off. Cork tissue [...] (Polyphagotarsonemus latus) has a wide range of host plants, especially peppers, but also aubergine, tomato and cucumber. Additionally, many ornamental crops