• Phytophthora: symptoms starting to show

  April 7, 2021

  eliminate root diseases, but what we can do is look to keep an active, functioning root system, which supports any plants with a latent infection, and reduces [...] to manage the symptoms. What triggers the ‘fall out’? Root diseases are opportunists. In many cases, the latent population is waiting for the opportunity [...] through this generative transition or have a high fruit load in relation to the root capacity, then any susceptibility is exposed. If the demand for assimilates

• Plant Pollinator interactions in high temperatures

  knowledge that flower temperature might also play a role; the influence of radiation also needs to be considered. A flower can turn into a marketable fruit [...] hand. A humidity of 85% is fine for pollination in a semi-closed greenhouse, while a humidity of more than 80% starts to impede pollination in a conventional [...] pollination is taking place, and whether the setting is 100% is vital to ensure the maximum yield is achieved. Monitoring also provides a feedback loop

• Ahold Delhaize: ‘We can't sell anything without substantiated information’

  December 18, 2018

  ‘Continuous improvement is only possible if the relationship between the producer and the buyer is clearly defined.’ Leon Mol is the director of product [...] have that information. If there is no information, there is no product.’ Reactive attitude His colleague, Nienke Weidema, is in charge of ensuring the quality [...] information, then there is no need to work on improving these aspects.’ According to Weidema, this attitude can't provide a foundation for a bond of trust and

• Mealybugs and scales

  photosynthesis and therefore the yield. Where flowers and fruit are concerned, these often drop off; plant sap is low in proteins and rich in sugars. In order [...] Fruit and flowers are also fouled, rendering them unfit for sale, and the reduced level of photosynthesis in the leaves also reduces flower and fruit [...] ornamental crops, the mere presence of mealybugs is sufficient to render the product unfit for sale. A very small population can thus cause considerable

• Collaboration With Valto Against Pepino Mosaic Virus

  August 9, 2024

  substantial losses in tomato production around the world, with V10. What Is V10? V10 is composed of two mild variants of the Pepino mosaic virus (VX1 and [...] can compare V10 to a flu vaccination’ explains Guido Roozemond. ‘V10 is used preventatively and needs to be applied to young plants. In a lot of countries [...] world and currently protects a substantial percentage of the total production of tomatoes globally. V10: A Success Story V10 is now registered in 37 countries

• Beetles

  species, Coleoptera is the largest of all insect orders and displays an enormous variety of form, size and habit. A number of species are a serious pest in [...] aphids . Beetles undergo a complete metamorphosis, that is, the larvae do not resemble the adult at all, and must pass through a pupal instar before reaching [...] Solutions for beetle control Learn more about What are beetles? Beetles belong to the order Coleoptera, a well-known group of insects that are easily r

• Tobacco aphid

  matt, never glossy. Winged individuals have a brown-black head and thorax and a reddish abdomen. There is a dark brown spot on the abdomen and several [...] East and is a key pest of tobacco crops in both the United States and South America. The tobacco aphid ( Myzus persicae subsp. nicotianae ) is also encountered [...] aphid Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. When reproduction is asexual, the young

• Navigating Energy Efficiency, Greenhouse Lighting & Pollination Success

  December 1, 2023

  daylight is available. As a result, bumblebees may not become active or only become active much later in the day. It is essential that the flowers are open [...] day, it is best to keep hives closed and run hand pollination for one day, or when less that an average 1,5 biting mark is found. Humidity Is Also A Critical [...] humidity levels. It is therefore advisable to activate the plant by means of a heating pipe to lower the humidity around the flowers in the early morning

• Flies

  has recently developed into a major pest on soft fruits in Europe and North America. Sciarid flies and shore flies are mainly a problem in greenhouses. Their [...] prefer moist substrates that is rich in organic matter. Although they cause little direct damage to plants, they are often a problem due to their large number [...] deposited on leaves or flowers in ornamental crops, lettuce, and herbs also causes cosmetic damage, and sometimes this can occur on such a scale that growth

• Thrips

  larval instars, a pre-pupa and a pupal instar, and finally the adult insect. The eggs are kidney-shaped and have a white or yellow shell. Before a female deposits [...] control Learn more about What are thrips? Several species of thrips are a major problem in greenhouse horticulture. The Western flower thrips ( Frankliniella [...] which is a type of waste material that they produce as they feed. The frass looks like small black or white specks on the surface of leaves or flowers and