Onion thrips

finally the adult insect. The eggs of the onion thrips (Thrips tabaci) are laid in leaves, flower petals and in the soft parts of stalks. They are inserted into [...] 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 infestations [...] thrips (Thrips tabaci) usually pupate in the ground, although pupae can also be found on leaves, in flowers or in other sheltered places. The prepupal and

Western flower thrips

insect. The eggs of the western flower thrips (Frankliniella occidentalis) are laid in leaves, flower petals and in the soft parts of stalks. They are [...] 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 infestations [...] (Frankliniella occidentalis) usually pupate in the ground, although pupae can also be found on leaves, in flowers or in other sheltered places. The prepupal and

Whitefly

broadly comparable in outline. Find solutions for whitefly in your crop Life cycle of whitefly Whitefly damage The larvae need a lot of nutrients for growth [...] the physiology of the plant, as a result of which growth is retarded. In full sunlight, leaves can wilt and drop. Such leaf damage can in turn influence [...] development of fruit and lead to a reduction in yield. By sucking plant sap and secreting honeydew, whitefly reduces the aesthetic value of crops. This

Flies

pest on soft fruits in Europe and North America. Sciarid flies and shore flies are mainly a problem in greenhouses. Their larvae live in the ground and prefer [...] rich in organic matter. Although they cause little direct damage to plants, they are often a problem due to their large number. Larvae of flies of the family [...] for flies in your crop Fly damage Flies can cause damage to crops both directly and indirectly. The type of damage depends on the species of the flies

Aphids

extract large quantities of sap in order to get sufficient protein. As a consequence, the excess sugar is secreted in the form of honeydew, making the crop [...] by aphids in tomato in this way, as is the cucumber mosaic virus (CMV) in cucumber. How to prevent aphids To prevent aphid infestations in crops, you [...] healthy, productive crops. Biological control of aphids uses a combination of natural enemies that attack aphids in different ways: Parasitic wasps Predatory

American serpentine leaf miner

cosmetic damage. In tropical and subtropical areas this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces yield. In full-grown [...] toothed ovipositor, 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 [...] crawls out of the leaf and falls to the ground. This occurs in the early morning. The larva crawls into the ground to pupate. A small percentage of the larvae

Cotton leafworm

species feeding on plants of 40 families, containing 87 species of economic importance. It originates in Egypt, and is currently found in Africa, the Canary Islands [...] yellow. They are laid in clusters of 20 to 500 pieces on lower leaf surfaces, often on the lower parts of the plant. The female covers the eggs with bro [...] crawl to the ground and settle in the surface layers. The pupa is 15 to 20 mm long and reddish brown in colour. The forewings of the adult cotton leafworm

Fall Armyworm

Recently, it has been found in Africa too. The caterpillars of fall armyworms feed on the leaves, stems and reproductive parts of more than 100 plant species [...] disperse in a radius of about 500 km (300 miles) before oviposition, which is sufficient for them to move from seasonally dry habitats to wet habitats in Central [...] the warm, humid evenings. Females lay their eggs in clusters of 150-200 and can lay up to 2000 eggs in a lifetime. Eggs are white, pinkish or light green

Caterpillars

damage crops. Most of them feed on nectar. In contrast, the caterpillars have biting and chewing mouthparts and can devour large amounts of plant tissue. Many [...] that occur in greenhouses belong to the Noctuidae (the noctuid or owl moths), which is the largest of all lepidopteran families. Most adults of this family [...] underside of leaves. This causes a window effect where the epidermis of the upper leaf surface remains undamaged. Young caterpillars are often found in groups

Tobacco aphid

) probably evolved from the peach potato aphid in the Far East and is a key pest of tobacco crops in both the United States and South America. The tobacco [...] tobacco aphid ( Myzus persicae subsp. nicotianae ) is also encountered in a range of crops in greenhouses, such as sweet pepper, aubergine, chrysanthemum, and [...] and appearance of Tobacco aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When re