• Bacterial canker of tomato

  half of the season. The first symptoms are wilting of the lower leaves and subsequent expansion of the wilt upwards. Cutting the stem at the foot shows whitish [...] then growing into the vessels of the plant. Plant growth is inhibited and the plant wilts because the xylem vessels become blocked. The bacterium can survive [...] ‘suspect’ that year. On the infected field no potatoes or other Solaneceaous crops can be planted for five years. On other fields on the same farm, no seed potatoes

• Downy mildew of Cucurbits

  downy mildews, the optimum temperature is around 15 o C and the closer the temperature is to this, the shorter the leaf wetness period that is required. Inside [...] 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 [...] directly and the germ tubes infect the plants either through the stomata or directly by penetrating the cuticula. For germination free water is required.

• Fusarium wilt

  inside the vessel system of the host plant and spreads upwards inside the plants. The other species are dispersed upwards on the outside of the plant. [...] Fusarium oxysporum is the species causing vascular wilt. First the leaves turn yellow and wilt, mostly on one side of the plant. Finally, the whole plant wilts [...] General Fusarium is a group of soil-borne fungi with many different species. Fusarium is widespread and can infect a range of host crops. Many species

• Quad

  flowers Position the Quad hives evenly througout the plot. The best position is on a horizontal platform just above the ground Wait at least for half an hour [...] down the hive for example with a stone, to prevent it from blowing away Open the ventilation openings on top of the hive during warm weather Pull the white [...] of sun on days with temperatures above 25°C). Storage time after receipt To guarantee the best pollination results, start using the hive on the day of

• Root rot of carrot

  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 [...] after 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 [...] to black lesions of various shapes. The lesions can merge and eventually cover the entire surface of the carrot. The affected areas are firm, shallow, and

• Cottony soft rot

  by the germinating sclerotia. The fungus grows quite rapidly inside the plant and kills the host cells. On the infected plant tissue white, fluffy mycelium [...] as 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 ( [...] mycelium infects the stem base and the roots, whereas the ascospores infect the above-ground plant parts. In greenhouses, usually only mycelium is produced by

• Limonica strong contender against persistent thrips

  September 15, 2025

  predatory mite is showing exceptional promise: Limonica . Why Limonica? Limonica ( Amblydromalus limonicus ) is a predatory mite that feeds on a wide range [...] A. limonicus egg laying and predation capacity on T. parvispinus larvae Thrips remain a persistent challenge in protected horticulture. Emerging species [...] supplemental feeding. A. limonicus egg laying and predation capacity on S. dorsalis larvae Key advantages of Limonica Effective at a broad temperature range

• 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 [...] zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia, a type of spores) with sporangia [...] leaf wetness is required. Dispersal is by wind and rain causes the pathogen to be returned to the soil from infected plants. Dispersal in the soil happens

• Natutec biocontrol application devices

  application methods. The right system for you Choosing the right system depends on the specific needs of your operations, particularly the surface area and [...] empowering nature with technology! The Natutec product portfolio offers a broad range of application devices for the dispersal of beneficial organisms over [...] using Natutec technology. Endorsed by Koppert Natutec is a product brand of Koppert. We specialize in the production and supply of biological control products

• Early blight

  General The only known stage in all Alternaria species is the asexual stage. Conidia and mycelium overwinter in the soil and on crop residues and cause [...] lesions on stem and foot. On fruits, dark sunken, leathery lesions occur at the side of the stem. Life cycle and appearance of Early blight From the primary [...] spores surviving in the soil are the main source of infection. Especially wheat and barley reduce the number of surviving conidia in the soil. Use resistant