• Powdery mildew

  January 1, 1970

  colonies mostly occur in these crops. In covered roses, the colonies appear first and foremost on the upper side of the leaves. In most crops, the white [...] found yet for all powdery mildew fungi and especially in greenhouse crops they don’t play a role in the epidemics. Fungal spores germinate on the leaf surface [...] fairly similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost on the upper side of the leaf. In severe epidemics

• Swirski-Mite

  January 1, 1970

  are detected in the crop. Introduction rates typically range from 25-300 per m2/release. Releases should be repeated if necessary. Consult a Koppert advisor [...] various thrips species and eggs and larvae of whitefly . Crops Do not use in tomato. Mode of action Predatory mites use their piercing mouthparts to extract [...] Diboxes Make sure the material remains on the introduction site for at least a few hours after introduction Can also be applied with Natutec Airobreez , Natutec

• Spidex

  January 1, 1970

  Releases should be repeated once or twice at weekly intervals. Consult a Koppert advisor or a recognised distributor of Koppert products for advice on the best [...] Diboxes Make sure the material remains on the introduction site for at least a few hours after introduction Can also be applied with Natutec Airobreez , Natutec [...] situation. Start introduction as soon as the first pest mites are detected in the crop. Introduction rates typically range from 2-50 per m2/release. Releases

• Glume blotch

  January 1, 1970

  lesions, new pycnidia are formed. The conidia that are produced in these pycnidia emerge in a pink slimy substance. The conidia are released at high relative [...] which presents itself as brown, elongated lesions with a light halo on leaves, stems and glumes. In the centre of the lesions, light-coloured translucent [...] the lower leaves are infected and frequent rain is expected Be aware that in a crop with dense foliage, splash dispersal is more efficient so the disease

• Vidi Fortum

  January 1, 1970

  from 3-5 litres/ha Applications should be repeated a number of times Consult a Koppert advisor or a recognised distributor of Koppert products for advice [...] Venturi system Avoid drainage in substrates when applying by drench/drip to prevent leaching Make sure Vidi Fortum does not remain in the irrigation system overnight [...] package has been opened. Storage temperature 5-20°C/41-68°F. Storage conditions In a cool dark place Avoid direct sunlight Protect against freezing

• Verticillium wilt

  January 1, 1970

  are pale-green, then orange-yellow. In the beginning the plant seems to recover at night. The symptoms may occur only in parts of the plant. Cutting the stalk [...] system usually stays mostly intact. In rose, branches die off from the top and purple brown stripes occur on the stem. In tomato, sometimes V-shaped lesions [...] transported upwards with the transpiration stream. As a defence mechanism, the plant produces gum in the vessels. The presence of both the fungus and the

• Entomite-M

  January 1, 1970

  insects. The mites appear in and on the soil and at the base of plant stems. The reduction of the infestation level occurs at a slow but steady rate. Pack [...] be repeated once or twice, or until control is achieved. Consult a Koppert advisor or a recognized distributor of Koppert products for advice on the best [...] conditions For optimal results the medium has to be moist, rich in organic matter and have a loose structure. The minimum temperature for successful use of

• Wheat bunt

  January 1, 1970

  kernels, which in turn become a source of disease in the next season. Infection is strongly correlated to temperature and precipitation in the first 11 days [...] tritici and Tilletia laevis survive as teliospores in the soil or on seed. These teliospores germinate in response to moisture and form basidiospores, also [...] Two mating types are distinguished. The filiform basidiospores fuse in the middle with a basidiospore of the other mating type so that H-shaped structures

• Downy mildew of Cucurbits

  January 1, 1970

  or surviving mycelium sporangia are formed, structures in which zoospores are produced. However, in downy mildews, sporangia often germinate directly and [...] prevent Downey mildew Choose resistant cultivars Use a wide crop rotation with non-host crops Prevent a humid microclimate. Achieve this by lowering crop [...] crop density, good aeration during propagation and maintaining a warm and dry climate in greenhouses. Use hygiene measures. Start clean, remove crop residues

• Pea blight, leaf and pod spot

  January 1, 1970

  General Ascochyta pisi is a fungal plant pathogen that causes A scochyta blight on pea (leaf blight or pea blight) and lesions of stems, leaves, and pods [...] ) causes foot rot in peas, whereas Ascochyta pisi does occur sometimes at the stem base but is not part of the foot rot syndrome in peas. Infected seeds [...] dispersal. How to prevent Pea blight, leaf and pod spot Grow peas in arid regions Use clean seed Use a minimum crop rotation of four years with non-host crops Bury