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

  March 17, 2025

  by firsthand experience of the impact of chemical pesticides. My father developed severe eczema from handling chemical sprays, and it became clear that we [...] Pieter explains. “Koppert has grown tremendously, but it remains a family business at heart—focused on quality, innovation, and close relationships.” Despite [...] smooth. “We’ve tried all kinds of methods—some worked, some didn’t. I remember one experiment with a garlic-based product. We applied it in the evening, and

• Optimising disease biocontrol in propagation

  April 26, 2021

  pathogen, develop a dark brown or black lesion that extends upwards from the basal end. Infected cuttings generally lead to poor root development, or in severe [...] ‘delivering disease protection’. Hardy ornamental nursery stock species develop roots from cuttings at different speeds. The rooting speed, propagation [...] produce healthy rooted plugs represent an unwelcome economic loss to the business, that can often be avoided. A hygiene programme is a significant part of

• FAQ Spidex Vital

  Is this product exclusive to Koppert? We have co-developed this product with a partner in our business. They will also supply this formulation of Phytoseiulus [...] it was near impossible? After years of research, Koppert has managed to develop a new formulation for better control of a number of vital aspects. This

• Phytophthora: symptoms starting to show

  April 7, 2021

  Vitix) to develop the diversity in the substrate, the best results are achieved when the root system is active. For further information of developing plant [...] and strawberry crops are moving from the vegetative to the generative development stages. Unfortunately, despite all the care and attention given to the [...] steps to promote plant health , and help the crop get through to harvest. Developing and maintaining an active and resilient root zone, will not cure the disease

• Airobug – “the aerial application system”

  January 6, 2021

  number of years at our other site. However with the new Clay Lake site development, traditional manual methods of applying beneficial insects wasn’t practical [...] Leaders in mechanical application “Koppert is the world leader in the development of mechanical application devices and systems that improve application [...] process.” Antonio concluded that the Airobug has met his practical and business needs. “We have been impressed by the Airobug and Koppert’s know-how. This

• Glasshouse potato aphid

  on is asexual, the young aphids are born as developed nymphs. They immediately start to feed on plant sap and grow rapidly. When reproduction is sexual

• Thrips

  instars are recognizable by their developing wing buds. Compared with the pre-pupa, the pupa has longer, more developed wing buds and longer antennae that [...] They are often found on the undersides of leaves, where they feed on plant sap. Damage: Thrips can cause damage to leaves, flowers, and fruits by feeding [...] color and have a similar shape to the adults but are smaller and lack wings. One of the most distinctive features of thrips larvae is their characteristic

• Roots Growers positive about Mycotal against whitefly

  conclusions. We need more than one season of tests and analyses. That said, I did notice that the whitefly’s development cycle had clearly been inhibited [...] s. Located along Zwethlaan, the company’s headquarters has two sections: one covering 7 hectares (crops without artificial lighting) and another covering [...] our cultivation to be as organic as possible. It has to be, as there’s only one chemical product against whitefly in tomato that is effective and, unlike

• A good fruit set is the start of a good production!

  April 6, 2020

  example is actively involved in pollen germination and seed, fruit and nut development. When the flowers are opening, active pollination is needed. Most fruits [...] essential during this period, and often a limiting factor, in order to develop strong cell walls. What can you do as a grower to ensure good pollination [...] zinc) available during flowering. Be ahead of any ‘hidden hungers’ (e.g. leaf sap analysis), and apply appropriate trace element and calcium foliar sprays to

• Grower Koen - Embracing biological crop protection in agriculture

  Inheriting the farm from his parents, Koen had the opportunity to continue the business. While the trend towards organic farming was growing, Koen felt that it [...] farming. It also gives him the opportunity to grow alongside Koppert in the development and application of biological crop protection.| The future Koen's vision