Mottled arum aphid

greatly reduce plant vigour and kill the plant through sucking of plant sap. However, also at lower densities the aphids can damage plants because they produce [...] and also result in an unattractive plant with a much lower market value. Neomyzus circumflexus can also transmit plant viruses. Life cycle and appearance

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 [...] found in the top of the plant and on the underside of young leaves, where they deposit their eggs. When shaking infested plants, adults will first fly, [...] tropical and subtropical America, probably Brazil or Mexico. Hundreds of plant species from different families serve as suitable hosts for this whitefly

Herbs

leafy green or flowering parts of a plant, which can be used fresh or dried. Spices derive from other parts of herbal plants and are often dried seeds, berries [...] About Herbs are actually all plants which are used as food ingredient, natural medicine or fragrances. They often have savory or aromatic characteristics [...] and fruits. Botanically speaking, ‘herb’ is synonymously to ‘herbaceous plant.’

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 [...] blue, to purple and have yellow stamens. After the flowering phase, the plants grow small, green fruits which look like cherry tomatoes and contain about

Hop

a small genus of flowering plants in the family Cannabaceae. Hops are the female flowers (seed cones, strobiles) of the plant and are considered the main [...] ingredient in making beer. Although frequently referred to as hops “vine”, this plant is technically a bine. Bines have stout stems with stiff hairs to aid them [...] Hemisphere where currently the most acreage of production occurs. Although these plants have a very long life cycle, with the continued popularity of microbrews

Two-spotted spider mite

mite damage Larvae, nymphs and adults cause damage to the host plant by feeding on plant sap. They mainly occur on the underside of leaves where they pierce [...] reduced plant growth. As damage increases, whole leaves turn yellow, and as more cell sap is removed, the leaf, and eventually the whole plant, may die [...] they feed on plant sap. They produce fine webbing over the infested area. Damage: Spider mites can cause damage to leaves by piercing the plant cells and

Black vine weevil

into corms, rhizomes and stem bases of plants. Larvae can also feed above ground within the stems of the plants. Both adult beetles and larvae are polyphagous [...] polyphagous and feed on a large number of plant species. High populations of larvae can destroy plants under field conditions. Established crops are more [...] more resistant to damage than young plants or just planted cuttings. The adult beetles are only active at night, taking round bites out of the leaves, starting

Cotton aphid

gossypii ) is an extremely polyphagous aphid found on more than 700 plant species. Crop plants attacked by this aphid include cotton, citrus, coffee, cocoa, [...] 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

Cutworms

these moths usually feed on roots and plant parts close to the ground, thereby often cutting the stems of young plants. This is where their common name comes [...] observed because of partial cutting. A larva often cuts one plant and quickly moves on to other plants and continues cutting. Therefore, relatively small populations [...] cotton or maize. As plants become larger, older instars will occasionally tunnel into the growing stalk, disrupting the sap flow in the plant. Life cycle and

Tobacco aphid

chrysanthemum, and various pot plants and cut flower crops. Damage symptoms Nymphs and adults extract nutrients from the plant and disturb the balance of growth [...] the plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season, the death of young plants. Retarded [...] Retarded growth and defoliation reduce yield. Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities