• Treatment of bumblebee stings and allergies

  January 1, 1970

  epinephrine into the thigh in the case of a sting. Tests and treatments are available at the Allergology department of the RdGG (Dr de Groot) at the Diakonessehuis [...] allergies This information on bumblebee stings provides guidance for reducing the chance of being stung by a bumblebee and about the possible reaction to a [...] is the case with honeybees and wasps. Drones cannot sting. The stinger is a weapon for defence. When a bee stings, some venom is injected into the body

• Leaf stripe

  January 1, 1970

  first occur on the first, second and third leaf and subsequently on other leaves. Yellow stripes are formed at the base of the leaf and the leaf sheath [...] Eventually this leads to the death of the leaf. The leaf splits at the end which makes it look shredded. This is typical for this disease. Infected plants [...] during the cropping season. The fungus is seed-borne and this systemic infection is the only source of primary infection. The fungus spreads from the seed

• Southern blight

  January 1, 1970

  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 [...] darkening and rotting of the stem, resulting in the destruction of the cortex and the main root. As a consequence, leaves higher up in the plant start yellowing [...] observed on the plant’s stem, which may also develop on the adjacent soil. Spherical sclerotia, which are initially white and then darken, also form on this

• Grapevine powdery mildew

  January 1, 1970

  early berry development. As the season concludes, the fungus forms chasmothecia to ensure its survival through the winter. Given the polycyclic nature, preventive [...] Symptoms of grapevine powdery mildew vary according to the phenological growth stage and the severity of the infection. Early signs manifest as chlorotic (pale [...] growth and poor fruit set. During berry development, the pathogen colonizes the epidermis, causing the skin to lose elasticity. This frequently leads to berry

• Apple collar rot

  January 1, 1970

  system and black discolouration of the roots. On the foot, dark brown lesions with sharp borders occur. Above the graft and on leaves, dark brown, irregular [...] from the root to the foot, but direct infection of the foot also occurs. Exudates leaking from growing root tips promote germination and attract the zoospores [...] zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia, a type of spores) with sporangia

• Experience Centre

  January 1, 1970

  hours and is suitable for groups of up to 15 visitors. In the case of bigger groups, the programme can be adapted in consultation. The Experience Centre may [...] natural pollination, come and visit the Koppert Experience Centre where you can take an interactive journey through the fascinating world of sustainable [...] production process and discover the importance of miniscule organisms such as predatory mites and beneficial fungi for international agriculture and h

• Dwarf bunt

  January 1, 1970

  sporidia infect the wheat seedlings even before emergence and the fungi grow inside the plants to the growing tip. The fungi grow between the plant cells and [...] heads. The glumes are opened either on some or on all spikelets, showing the bunt (smut spore) they contain, which is larger than a normal kernel. The bunt [...] survives as teliospores in the soil or on seed. The soil-borne teliospores are the main source of primary infection. The soil-borne teliospores may survive

• Blight of pepper

  January 1, 1970

  and crown rot in potted plants. The small roots die and brown-black lesions occur on the larger roots. Plants wilt and the crown leaves drop off. Life cycle [...] from the root to the foot, but direct infection of the foot also occurs. Exudates leaking from growing root tips promote germination and attract the zoospores [...] zoospores. The pathogen grows into the stem and on the plant surface and new sporangiophores (structures containing sporangia, a type of spores) with sporangia

• Grower Koen - Embracing biological crop protection in agriculture

  January 1, 1970

  a conscious choice. Inheriting the farm from his parents, Koen had the opportunity to continue the business. While the trend towards organic farming was [...] organic farming marks the path to the future. "You grow into it a bit," notes Koen. With the growing availability of knowledge and the number of biological [...] believes that the reduction of chemical methods paves the way for organic alternatives that can complement traditional farming practices. For him, it is clear

• Bacterial spot

  January 1, 1970

  halo. In pepper, the spots on the leaves are also round and small to start with and slightly raised from the leaf surface. They occur on the abaxial (underside [...] as they grow. The centre of the lesions may fall out as they become drier. Under humid conditions, the spots may merge with lesions on the petioles and [...] infection, pepper plants shed the leaves that are severely infected. Humid conditions are conducive for lesion expansion. On the stems, long, narrow cankers