• Crazy roots, hairy roots, crown gall

  be caused by a change in the hormonal system of the plant resulting from the Rhizobium infection. Rhizobium rhizogenes puts a Ri-plasmid in the plant tissue [...] growth (crazy roots). In greenhouse vegetables, the roots overgrow the substrate and in severe epidemics the drippers get clogged. In tomato, excessive vegetative [...] tissue and causes a genetic change in the plant. How to prevent Crazy roots, hairy roots, crown gall Use clean propagation material Use a strict hygiene protocol

• Cottony soft rot

  cottony soft root, is a plant pathogenic fungus. It has a very wide range of host plants. Damage symptoms The first symptoms of a cottony soft root ( S [...] Sclerotinia sclerotiorum ) overwinters as sclerotia and mycelium in dead and living plant material in or on the ground. Sclerotia germinate at temperatures between [...] be careful with irrigation Use wide plant spacing Remove diseased plants in a closed plastic bag Remove crop residues Prevent plant diseases by optimizing

• Powdery mildew

  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

  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

  Releases should be repeated once or twice at weekly intervals. Consult a Koppert advisor or a recognized 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

• Verticillium wilt

  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

• Veni GoKlean

  of Fungi, Bacteria and Virus on plants and post harvesting. It is helpful in extending shelf life of the produce, due to its disinfection property. Unique [...] GoKlean work? The combination of these two elements silver and copper has a synergistic effect to disinfects all forms of microbes. Colloidal particles [...] drench), 5 ml (for tuber/rhizome/plant material treatment) of Veni GoKlean in 1 L of water and apply on the target area. Veni GoKlean can be used for regular

• Grapevine powdery mildew

  Grapevine powdery mildew (Erysiphe necator) is a widespread fungal disease that poses a serious threat to commercial viticulture worldwide. The pathogen [...] powdery mycelium. As the infection intensifies, affected leaves suffer a marked reduction in photosynthetic capacity, while shoots and flowers exhibit stunted [...] buds or as chasmothecia (sexual fruiting bodies) attached in the bark crevices and plant debris. In spring, chasmothecia release ascospores during periods

• Black sigatoka disease

  old. The symptoms run parallel to the veins. Within a few days, the spots become a few centimetres in size and turn brown with light grey centres. These [...] and the whole leaf turns brown and ultimately dies. In cases of severe infection leaves may die within a few weeks. Because of the lack of leaf tissues, fruit [...] germinate within two or three hours under humid conditions, but infection takes a minimum of two or three days under optimal conditions (humidity close to saturation

• Downy mildew of Cucurbits

  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