• Powdery mildew

  the colonies mostly occur in these crops. In covered roses, the colonies appear first and foremost on the upper side of the leaves. In most crops, the white [...] contact with water for no more than a few hours. Powdery mildew spores, either ascospores or conidia, don’t need nutrients or water for germination. In general [...] optimizing plant potential and crop resilience. Recommended for you Biocontrol solutions for outdoor crops – Koppert partners with European growers “Empowering

• Impatiens thrips

  having spread to many countries within the last 30 years. The thrips have mostly been able to spread as a consequence of the trade in foliage plants. Impatiens [...] can be seen as discolouration of older leaves at the bottom of the plant. Life cycle and appearance of Impatiens thrips Impatiens thrips (Echinothrips [...] wings are white at the base. This colouration distinguishes the species from most other thrips species commonly found in greenhouses.

• Onion thrips

  (Thrips tabaci) is found mostly along the main leaf veins, with most damage evident where these veins join. Fruit damage, for instance in cucumber, only [...] has been identified as an important vector of tomato spotted wilt virus. Life cycle and appearance of Onion thrips Onion thrips (Thrips tabaci) develops

• ‘Nutrients and plant resilience? A very simple mechanism

  April 6, 2020

  pollination , fruiting, and ultimately production. In order for biostimulants to get the most out of it, negative disruptive influences should be corrected [...] potassium, and phosphorous as possible as reserves for more difficult times. ‘But be careful, the plant cannot change by itself. The grower is the one providing [...] straightforward.’ Mark van der Werf has been working on improving plant health for many years, including use of bio-stimulants and nutritional products from

• Neoseiulus californicus

  effectively over the longer term. Neoseiulus californicus for pest control Neoseiulus californicus is used for the control of the following pests: Spider mites [...] to await the arrival of new prey. Life cycle of Neoseiulus californicus The developmental stages are the same as for other members of the Phytoseiidae [...] food supply has been absent for some time, they become thinner and a uniformly light transparent colour. Best conditions for use of Neoseiulus californicus

• Garden chafer

  and developing fruits of, for instance, roses and cherries. Damage symptoms The garden chafer ( Phyllopertha horticola ) does most of its damage in the larval [...] crops but reduces the value of ornamental plants. Life cycle and appearance of Garden chafer The life cycle of the garden chafer ( Phyllopertha horticola [...] Phyllopertha horticola ) is a beetle from the Scarabaeidae family. It does most of its damage in the larval stage when it feeds on roots of grasses and clover

• San josé scale

  as crawlers. Crawler stage The crawler stage is the only mobile life stage and the most vulnerable to control. Crawlers disperse across the tree, settle [...] Monitoring San José scale Regular monitoring is essential for early detection. Inspect orchards for: Scale insects on twigs and branches Red halos on developing [...] is San José scale? San José scale (Comstockaspis perniciosa) is one of the most economically important scale insects affecting apple and pear orchards. Both

• 2023 trial season proves value of biological solutions in outdoor crops

  March 5, 2024

  preparing for the next trial season, which will feature more countries and more solutions for a greater variety of crops. Like a biofungicide for seed treatment [...] learn what biological crop protection can do for them. Throughout the year, they followed our protocols for a range of products, from biofungicides to natural [...] out, there is an urgent need for biological alternatives. The trials with Citripar and Cryptobug , Koppert's solutions for the prevention and control of

• Getting a head start - The importance of scouting in winter

  January 7, 2025

  undergoes significant changes as the seasons shift from winter to early spring. For growers, this transition is not just about preparing for planting; it is [...] conditions for beneficials: Scouting helps determine the best timing and environmental conditions for releasing biological control agents. For example, [...] is also a critical time for pest and disease management. Effective scouting during these months is essential for early detection and management. Understanding

• Transforming crop protection: the rise of predatory mites

  July 21, 2025

  A passion for insects – and a new beginning in Almeria After studying biology in Granada with a focus on entomology, Jose moved to Almeria for family reasons [...] to be part of that.” The Swirskii breakthrough that changed everything One of his earliest and most impactful projects at Koppert was the introduction of [...] and Orius . It was a turning point. “For the first time, predatory mites offered a working, scalable solution for growers - and it triggered a real shift