• Sugar beet

  consists of the root and a rosette of leaves. Sugar is formed by photosynthesis in the leaves and is then stored in the root. Sugar beets are the second only [...] belongs to the Altissima cultivar group of the common beet. Beta vulgaris (beet) is a plant which is included in Betoideae subfamily in the Amaranthaceae [...] ae family. The root of sugar beets contain high levels of sucrose. It has a conical, white, fleshy root (a taproot) with a flat crown. The plant consists

• Pine processionary moth

  enlarge until the fourth instar when the definitive winter nest is built. In general, this is situated at the branch tips in the upper part of the crown. At [...] shoots. The larvae develop through five instars and the full-grown caterpillar is about 40 mm in length. The head capsule is black. The body of the first-instar [...] arranged in pairs. The integument and hairs that clothe the body vary considerably with different provenances. In general, the integument is darker in colder

• Rose aphid

  deep pink to red-brown. The antennae and sometimes the head is dark in colour. The siphunculi are black and bent outwards. The rose aphid usually overwinters [...] before reaching adulthood. With each moult they shed white skin, betraying their presence in the crop. Wingless females of the rose aphid are 1.7-3.6 mm [...] General The rose aphid, Macrosiphum rosae , is a serious and often abundant pest of roses. It is virtually cosmopolitan and widely spread in Europe. Damage

• Koppert UK Conference: 19th October 2023

  August 25, 2023

  working within the same broad field to connect, strategise and discover the wide range of options available from Koppert UK. In light of the diversified [...] accomplished guests will be attending the conference including; industry leaders in the application of biological control in food production, dedicated researchers [...] conference will provide the perfect opportunity to engage with experts and find the answers. There will also be an opportunity throughout the conference for leading

• Western flower 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. [...] General The western flower thrips (Frankliniella occidentalis) is currently the most damaging thrips species in many greenhouse crops. The western flower [...] 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 inserted

• Southern European marshland pyralid

  within the crop or in another suitable spot in the vicinity. Pupation occurs in a cocoon made of webbing, frass and soil particles. The pupa itself is yellow-brown [...] caterpillars often stay in the lower strata of the crop, sometimes attacking the stem of the plant as well as the leaves. Late instar larvae burrow into soft [...] overlapping in a tile-like fashion on both the upper and lower surface of leaves close to the veins, or low on the stem or stalk close to the ground. The pinkish

• Impatiens thrips

  americanus is often found low in the crop. In sweet pepper the damage can be seen as discolouration of older leaves at the bottom of the plant. Life cycle and [...] exclusively on the leaves and is often present on weeds in greenhouses. Damage symptoms Thrips cause damage to plants by piercing the cells of the surface tissues [...] causing the surrounding tissue to die. The resulting silver-grey patches on leaves and the black dots of their excreta indicate their presence in the crop

• Broad mite

  General The broad mite (Polyphagotarsonemus latus) occurs in the tropics and in greenhouses in temperate regions. The broad mite (Polyphagotarsonemus latus) [...] (about 0.07 mm) compared with the subsequent, active stages. They are transparent and speckled with white dots. The larva of the broad mite ( Polyphagotarsonemus [...] to the damage caused by viruses. The typical pattern of damage consists of malformation and distortion of the above-ground growth of the plant. The mites

• Downy mildew of Cucurbits

  around 15 o C and the closer the temperature is to this, the shorter the leaf wetness period that is required. Inside the plant, the pathogens produce haustoria [...] brown. On the underside of the leave fluffy growth appears which is first white and later turns grey-brown. This is actually the sporulation of the pathogens [...] through the stomata or directly by penetrating the cuticula. For germination free water is required. For most downy mildews, the optimum temperature is around

• Cabbage

  various cultivars of Brassica oleracea ) is a biennial plant with green, white or purple leaves. This plant is usually grown as an annual vegetable crop [...] crop for consumption. Cabbage heads come in various sizes and their weight usually varies between 0.5 to 4 kilograms (or 1-9 lbs).