Bacterial wilt, brown rot

roots on the stem. The vascular stem tissue is coloured brown and when the stem is cut, bacterial slime oozes from the wound. This is the way to distinguish [...] solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very wide range [...] Ralstonia solanacearum is a quarantine organism in Europe and considered a bioterrorist organism in the United States. It is a commonly found soil-inhabitant

Fall Armyworm

tan to green to black. They have a distinct white inverted Y-shaped mark on the front of the head and four large spots on the upper surface of the last [...] Armyworm General The fall armyworm is a polyphagous pest that is indigenous throughout the Americas. Recently, it has been found in Africa too. The caterpillars [...] and measure 13 to 17 mm in length. The eggs hatch after 3-5 days. Over the next 2 to 3 weeks, the larvae pass through 5-6 stages and the pupal stage takes

Root rot of carrot

which whole sections of the leaf will die off. The fungus appears to prefer older tissue. In the field, the disease is difficult to distinguish from both [...] develop on the surface. Initially, the disease forms circular to irregular spots on the leaves that vary in colour from grey to almost black. The spots appear [...] appear to be sharply defined, but under a magnifying glass it appears that the infected area radiates into the healthy tissue. The spots can increase in

Flies

can cause damage to crops both directly and indirectly. The type of damage depends on the species of the flies. Direct damage is the immediate result of [...] control videos Take a look at the video or go to our Youtube channel to see our fly control products in action. How to get rid of flies The latest news about [...] they cause little direct damage to plants, they are often a problem due to their large number. Larvae of flies of the family Keroplatidae (mainly Lyprauta

Southern blight

causing infection in the plants. The sclerotia can survive in the soil for a minimum of a year. The telemorphic phase corresponds to the basidiomycetes Athelia [...] southern blight is a disease caused by the fungus Athelia (Sclerotium) rolfsii . It is an important plant pathogen that inhabits the soil, and is responsible [...] lesions on the stem. As the damage progresses, it causes darkening and rotting of the stem, resulting in the destruction of the cortex and the main root

Thrips

form the order Thysanoptera, a name that literally means ‘fringed wings’, and refers to the eyelash-like fringe of hairs along both edges of the thin wings [...] piercing the cells of the surface tissue and sucking out their contents, causing the surrounding tissue to die. The resulting silver-grey patches on leaves [...] leaves and the black dots of their excreta indicate their presence in the crop. At a later stage, the empty cells become desiccated and the adjacent cells

General Conditions Koppert

Koppert. 8.3 I n the event of a complaint the Buyer is, in part, obligated to give Koppert the opportunity to inspect the crop in which the Natural Enemies [...] placed by the Buyer, provided this confirmation is signed by a person who is authorized to enter into the agreement; b. by the reaching of a written [...] Buyer is in breach without any further notice of default. 6.7 s soon as the Buyer is in breach, the Buyer is obliged to pay to Koppert A interest on

Spical Ulti-Mite

in the crop, not exposed to direct sunlight Sachets already have an exit hole Hold sachets by the cardboard strip at the top, to avoid damaging the predatory [...] after 4-6 weeks if the pest is not controlled. Consult a Koppert advisor or a recognized distributor of Koppert products for advice on the best strategy for [...] Mode of action Predatory mites reproduce within the sachet and gradually disperse into the crop over a period of several weeks. Using their piercing mouthparts

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Black root rot of cucurbits

restricted to a few of the roots but in severe cases all roots may be infected. At the final stage of the disease, only vascular tissue remains because the cortex [...] stage may kill the plants. In case of a less severe infection, the vines may wilt at a late stage of the crop, but when water supply is in any way limited [...] but little else is known about the life cycle. The fungus is dispersed by water, air and soil particles. Damage symptoms Phomopsis sclerotioides causes grey-black