• Leaf stripe

  at soil temperatures above 15 °C. How to prevent Leaf stripe Produce seed in semi-arid environments without irrigation, to decrease the chances of infection [...] or at least test the seed before use Use resistant cultivars Delay sowing in spring barley until soil temperature is higher than 12-15 o C Prevent plant

• Leaf spot of strawberry

  New diseases in strawberry have been ascribed to Pestalotiopsis clavispora in the case of root and crown rot (of strawberry), first found in The Netherlands [...] Netherlands, and Pestalotiopsis longisetula in the case of leaf spots, such as leaf spot of strawberry and fruit rot reported mainly from Brazil. The genus is [...] the life cycle. The fungus produces ascospores and conidia, but their role in the epidemic has not yet been established. How to prevent Leaf spot of strawberry

• A legacy of sustainability: Stolk Brothers and Koppert’s shared vision

  March 17, 2025

  ago. The Stolk Brothers’ journey in horticulture began in 1925 when Pieter Stolk’s great-grandfather purchased land in Bergschenhoek and started growing [...] transition to biological crop protection was both a necessity and a calling. “In the early 90s, my father and uncle began working with Koppert, driven by firsthand [...] imagine horticulture without biological pest control.” A partnership rooted in trust The connection between Stolk Brothers and Koppert runs deep. “Our families

• Latest R&D data about the new strain of Myzus persicae

  February 9, 2025

  Research Assistant at Koppert Challenges in diagnosis Myzus 2.0 posed unique challenges not only in the field but also in the lab. The strain showed a reduced [...] potential allies in combating the pest. Additionally, adjustments were made to application strategies to ensure maximum effectiveness in varying conditions [...] Onne Isfordink, a member of Koppert’s R&D team, ‘At the time, I was working in the department responsible for identifications. Every sample we received required

• Introducing the new Limonica: double the mites, double the power

  January 31, 2025

  to double the number of predatory mites in a bottle means that the product becomes more accessible to growers in both existing and new markets. More importantly [...] mite has proven to be the best solution in pest control, especially under low temperature conditions. Thriving in heavy pest infestations and lower temperatures [...] active in a wide range of temperatures, from 13°C to 30°C. Even at 13°C, it continues to lay about one egg per day, ensuring its effectiveness in colder

• Downy mildew of rose

  and this causes the plant to fall over. In cabbage the stem is also infected in severe epidemics. In blackberry, red stripes may occur on the stems and petioles [...] sporulation is relatively low, in general between 10 and 20 °C. Late in the season new overwintering oospores are produced and buried in the soil with crop residues [...] white and later turns grey-brown. This is, in fact, the sporulation of the pathogens extruding from the stomata. In lettuce, the foot is infected first and

• Blight of pepper

  optimal for crop growth. Phytophthora overwinters in roots, infected tubers and bulbs or in the soil in different stages: as oospores (sexual overwintering [...] leaves and fruits. Several Phytophthora species cause root- and crown rot in potted plants. The small roots die and brown-black lesions occur on the larger [...] Secondary infection is either by germinating sporangia or by zoospores produced in the sporangia. For germination on above-ground plant parts, leaf wetness is

• Glume blotch

  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 [...] as brown, elongated lesions with a light halo on leaves, stems and glumes. In the centre of the lesions, light-coloured translucent pycnidia (fruiting bodies) [...] and perithecia occur. Perithecia are also formed on dead glumes and stems. In case of severe infection , the heads of wheat become black and the kernels

• Loose smut of barley

  during flowering and the infected seeds are the primary source of inoculum in the next crop. The fungus survives inside the seed and when the seed germinates

• Root and crown rot of strawberry

  New diseases in strawberry have been ascribed to Pestalotiopsis clavispora in the case of root and crown rot (of strawberry), first found in The Netherlands [...] ascospores and conidia, but their role in the epidemic has not yet been established. Pestalotiopsis clavispora is mostly found in plants that have been weakened [...] Netherlands, and Pestalotiopsis longisetula in the case of leaf spots, such as leaf spot of strawberry and fruit rot reported mainly from Brazil. The genus is