Impatiens 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 [...] eggplants. It lives exclusively on the leaves and is often present on weeds in greenhouses. Life cycle and appearance of Impatiens thrips Impatiens thrips [...] specifically on the leaves. Eggs are deposited in the leaf tissue, while subsequent stages are found on the upper- and undersides of the leaf. Pupation occurs

Onion thrips

black dots of their excreta indicate their presence in the crop. The vigour of the plant is reduced by loss of chlorophyll. When infestations become serious [...] pupa, and 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 [...] cells of the surface tissues and sucking out their contents, causing the surrounding tissue to die. The resulting silver-grey patches on leaves and the black

European corn borer

are laid mainly on the underside of leaves. The larvae initially feed on the leaves and then bore into the upper part of the maize plants. Later, second [...] smaller and produce fewer kernels per ear. Life cycle and appearance of European corn borer The adults have a wingspan of 22-32 mm and pale yellowish to olive [...] turn yellow. The black head of the larva can be seen just before hatching. The eggs are laid in a mass and overlap like tiles on a roof. The average number

Greenhouse whitefly

whiteflies reduce the aesthetic value of crops. This is particularly important in ornamentals . Life cycle and appearance of Greenhouse whitefly The greenhouse [...] General The greenhouse whitefly ( Trialeurodes vaporariorum ) is one of the major pests of vegetable and ornamental crops in greenhouses throughout the world [...] and the excess is excreted as honeydew, with larger larvae expelling large quantities. The damage that whiteflies cause to a crop is the result of sucking

Corn earworm

green ears of corn. The larvae feed on the hairs of the young corn and on the young kernels at the tip of the cob. During the third instar, the larvae turn [...] which makes it necessary to open the crop to detect the pest. Life cycle and appearance of the corn earworm The eggs of corn earworm are a milky-white colour [...] since the cold reduces or halts their development. Damage symptoms The female lays small quantities of eggs, between one and three, in the hairs of green

American serpentine leaf miner

enter the plant tissue via the feeding spots. Life cycle and appearance of American serpentine leaf miner The life cycle of a leaf miner has the following [...] 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 [...] intermediate forms of tunnelling between these ‘plate mines’ and normal mines, making it an unreliable criterion for the identification of the species. Indirect

Black vine weevil

reduces the value of ornamental plants. Life cycle and appearance of Black vine weevil The life cycle of the black vine weevil consists of an egg, 6 or [...] It belongs to the family Curculionidae. Damage symptoms The major damage is caused by the feeding of the larvae on the roots. After the roots have been [...] temperate climates, the small (0.7 mm diameter), spherical white eggs are laid from the beginning of July until around the end of October. The larvae that hatch

Spidex Vital FAQ

Changes of Spidex What is the difference in the product presentation? Spidex Vital consists of all mobile stages of Phytoseiulus persimilis. The carrier [...] this formulation of Phytoseiulus persimilis. Is this a different Phytoseiulus species to the Spidex I am used to? No, it is exactly the same Phytoseiulus [...] colour than the Spidex I’m used to? During production of Spidex Vital the predatory mites don`t get to eat spider mites, which cause the coloration of Spidex

House fly

Giardia ), and the eggs of many parasitic worm species. Life cycle and appearance of House fly The adult house fly ( Musca domestica ) is 6–7 mm long, [...] organism to human populations; the housefly is always found in association with human activity. As the most common species of fly found on livestock farms [...] temperatures (around 15°C). Adult flies have an average life span of 15–25 days, but can live up to two months in the right conditions.

Western flower thrips

finally the adult insect. The eggs of the western flower thrips (Frankliniella occidentalis) are laid in leaves, flower petals and in the soft parts of stalks [...] crop. The vigour of the plant is reduced by loss of chlorophyll. When infestations become serious the leaves themselves can shrivel. Western flower thrips [...] disturbed. In the adults both pairs of wings are fully developed. Damage symptoms Thrips cause damage to plants by piercing the cells of the surface tissues