Cyclamen mite

Those living on plants can cause considerable damage to their host. Tarsonemids like the cyclamen mite ( Phytonemus pallidus ) can occur both on vegetable [...] the mite spreads very slowly. Symptoms vary depending on the host plant and can resemble the damage caused by viruses. Infested leaves are twisted or curled [...] flowers are damaged and leaf growth is inhibited. In hedera, a mite attack can cause baldness in parts of the stem. Gerbera flowers deform and discolour

Tobacco whitefly

and secreting honeydew. This can have the following consequences: If the population is very large, feeding on plant sap can affect the physiology of the [...] result of which growth is retarded. In full sunlight, leaves can wilt and fall. Such leaf damage can in turn influence the development of fruit and lead to a [...] deposit their eggs. This is why on one leaf all different developmental stages can be found together. When shaking infested plants, adults will first fly, then

Angular leaf spot

are the most important, but also all types of vascular tissue of the crown can be infected, creating a look similar to that of a Phytophthora fragariae infection [...] crop in new transplants. This bacterium is very resistant to desiccation and can survive well in dry leaves or leaves in the soil, but not independantly in

Cotton aphid

gossypii ) is an important vector for viral diseases. This aphid species can transmit more than 50 different viruses, including the cucumber mosaic virus [...] they shed white skin, betraying their presence in the crop. The cotton aphid can be distinguished from other aphids by the colour of the two cornicles (siphunculi) [...] (siphunculi). These cornicles are always black, whatever the body colour, which can vary widely, from light yellow to light green, or even a green-black colour

Spider mites and other mites

control of spider mites and other mites Spider mites and other mite species can rapidly infest greenhouse and field crops, feeding on plant cells and causing [...] biological solutions for spider mites and other mites, professional growers can maintain stable pest control, protect crop quality and ensure sustainable [...] contents. The empty dead cells become yellow, and in many plants the damage can also be seen on the upper surface of leaves as small yellow dots. The destruction

Neoseiulus californicus

than Phytoseiulus persimilis . It can survive longer than Phytoseiulus persimilis when spider mites are scarce and can control small spider mite populations [...] of spider mites . Although Neoseiulus californicus prefers spider mites it can also feed on other food sources such as other mites, thrips or pollen. This [...] including Two-spotted spider mite (Tetranychus urticae) . The predatory mite can also feed on other food sources such as other mites, thrips or pollen. Feeding

American serpentine leaf miner

quantity of foliage can get damaged before the harvest is affected. The older larvae make wider tunnels. Feeding spots made by adult females can also reduce yield [...] premature leaf-fall and cosmetic damage. In tropical and subtropical areas this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces [...] crops, this is usually of less significance. Seedlings and young plants can be completely destroyed as a result of the direct damage caused by leaf miners

Citrus mealybug

roses and gerbera. Additionally, the citrus mealybug ( Planococcus citri ) can also appear in cucumber, melon and aubergine. Damage symptoms Although most [...] their nourishment from roots, whilst others are gall-formers. A few species can also transmit harmful viruses. Mealybugs inflict damage on the crop in various [...] sufficient to render the product unfit for sale. A very small population can thus cause considerable economic damage. Life cycle and appearance of Citrus

Carrot

produced for its seeds and leaves. Carrots can be classified as hardy biennials and are grown as annuals. Carrots can vary greatly in colour, shape and size

Chilli pepper

the species Capsicum annuum . The pepper cultivars of Capsicum frutescens can both be annual or perennial (short-lived) plants. The plant’s flowers are [...] peppers) usually develop from a pale yellow to a bright red when ripe. Varieties can come in other colours as well.