• Phytophthora blight

  growth on the leaves. The centre is grey-brown with a light-green edge. On the stem, elongated brown lesions occur, usually circling the stem. On potato [...] cells which are resistant to desiccation) or mycelium. Zoospores are formed from the overwintering structures which infect the host. Zoospores are spores with [...] of Phytophthora blight Phytophthora species are very destructive organisms belonging to the Oomycetes and are therefore strictly speaking not fungi. They

• Black rot of carrots

  Alternaria causes spots on leaves, petals and stems. These spots can be distinguished by the dark and brown concentric rings that are caused by sporulation [...] and through wounds and stomata. Spores are dispersed by wind and in some species through the splash of rain. How to prevent Black rot of carrots Remove [...] species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause primary infection of the leaves. Survival can be several

• Common beans

  often tend to grow upwards, however many types are identified as ‘bush beans’ or ‘pole beans’, depending on how they grow. Kidney beans, pinto beans, navy

• Bacterial soft rot, bacterial stem rot

  tissue keeps its normal colour. On the fruits, lesions first are small and sunken, water-soaked and light to dark brown. They are adjacent to wounds and natural [...] pathogen in plants that are infected by other pathogens. The bacteria that causes black leg in potato is a different subspecies. How to prevent Bacterial [...] reach epidemic population densities. It can survive as epiphytic bacteria on various plants or in the soil in low densities. It has also been found in

• Wheat bunt

  stunted. Infected (bunted) heads are slender and remain green longer than healthy heads. The glumes are opened either on some or on all spikelets, showing the [...] soil or on seed. These teliospores germinate in response to moisture and form basidiospores, also called primary sporidium. Two mating types are distinguished [...] wheat. Damage symptoms Plantsinfected by Tilletia tritici and Tilletia laevis are hard to distinguish from infected plants before head emergence, although affected

• Aphidius ervi

  Expand all items How to use Aphidius ervi The parasitic wasp Aphidius ervi is available in a bottle ( Ervipar ). Spread the material on rock wool slabs [...] its introduction site for at least a few days The dosage of Ervipar depends on climate, crop and aphid density and should always be adjusted to the particular [...] Koppert advisor or a recognized distributor of Koppert products for advice on the best strategy for your situation. Best conditions for use of Aphidius

• Dwarf bunt

  causes (bunted) heads that are slender and remain green longer than healthy heads. The glumes are opened either on some or on all spikelets, showing the [...] Tilletia controversa survives as teliospores in the soil or on seed. The soil-borne teliospores are the main source of primary infection. The soil-borne teliospores [...] types are distinguished. The filiform basidiospores fuse in the middle with a basidiospore of the other mating type so that H-shaped structures are formed

• Thrips

  hairs along both edges of the thin wings. There are more than 6,000 known species. Most are harmless, some are predators, and fewer than 20 species can cause [...] y. Solutions for thrips control Learn more about What are thrips? Several species of thrips are a major problem in greenhouse horticulture. The Western [...] horticulture. Thrips are small insects (0.5-14 mm), with the largest species found in the tropics. In temperate regions they are not larger than 2.5 mm

• New website for Koppert India

  June 16, 2020

  product page explains how the Koppert products work. Our popular videos of our beneficials show a detailed analysis of how the pests are controlled. The website [...] to each country, it has become necessary to provide more customized content on our websites. The new website has a new ‘Solution Finder’ tool that offers [...] the right solution for their crop. The specific pests and diseases pages are designed to provide a clear overview of the pest or disease. The grower can

• Bacterial canker of tomato

  the affected field and potatoes from other fields on the farm, are labelled as ‘suspect’ that year. On the infected field no potatoes or other Solaneceaous [...] years. On other fields on the same farm, no seed potatoes can be grown for one year after infection. Damage symptoms Clavibacter causes spots on stems, [...] means that strong efforts are used to prevent the bacterium from entering. When the occasional infection is found, strict measures are taken to eradicate the