• A step-by-step guide to whitefly control

  transmit Beet Pseudo-Yellows Virus in cucumbers. Get the latest news about crop protection Subscribe Mass trapping - Horiver Mass trapping with sticky traps [...] Parasitic wasps In the battle against whiteflies, parasitic wasps serve as essential allies, targeting whitefly larvae while engaging in host feeding. Their [...] Performs optimally in lower temperature conditions compared to Eretmocerus eremicus . Distribution: Actively searches the crop for infestations in a random pattern

• Swirskii Predatory Mite Not All That Demanding

  May 3, 2019

  found elsewhere in the crop. The combination of all these characteristics means that the mite truly thrives in greenhouse crops. However, in warmer regions [...] Helps You Stay in Control Swirski-Mite: First Aid for Problems with Thrips and Whitefly The predatory mite Amblyseius swirskii can be used in a wide range [...] regions and during the summer in temperate regions, release in outdoor crops can also be effective. The swirskii predatory mite is anything but shy and is therefore

• Amazone Plants continues the path of organic cultivation

  less turned out fine – the plants in 12 cm pots were sold in 14 cm pots in the summer, and the plants in 14 cm pots went to the buyers in 17 cm pots. The company [...] such as Mycotal, twice a year, in the spring and in the autumn. Wim van der Meer explains, ‘Koppert is involved in a trial in which we are investigating whether [...] started to take off in 2015. In 2019, the tomato nursery also owned by Van Zijl was converted, before being added to the anthurium nursery in 2020. A remarkable

• Powdery mildew

  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 [...] fairly similar in all plant-pathogen combinations. The symptoms are white fluffy colonies, first and foremost on the upper side of the leaf. In severe epidemics [...] epidemics in cereals, the ears may also be infected. In pepper, the fluffy colonies occur mostly on the underside of the leaf, because the fungus infects

• Long-tailed mealybug

  yield. Flowers and fruit often drop off. Plant sap is rich in sugars, but low in proteins. In order to gain an adequate intake of protein, mealybugs must [...] sale, and the reduced level of photosynthesis in the leaves also reduces flower and fruit production. In ornamental crops, the mere presence of mealybugs [...] filaments is roughly half the width of the body. The female is 3 - 4 mm long. Reproduction in Pseudococcus longispinus , may be sexual or asexual, the latter

• Glasshouse potato aphid

  presence in the crop. The wingless adult stage of the greenhouse potato aphid is rather squat, of medium size (1.8 - 3.0 mm long) and oval in shape. It [...] to deformations in the growing tip of the plant. Precisely where the plant is pierced is unimportant. The piercing of the lower leaves in the crop can cause [...] margins. The immediate effects of piercing by the aphids are visible in lower leaves in the form of yellow patches. Heavy yellowing may even be followed by

• Bacterial wilt, brown rot

  quarantine organism in Europe and considered a bioterrorist organism in the United States. It is a commonly found soil-inhabitant in tropical and subtropical [...] for Race 3 is 27 °C, which makes it more dangerous in temperate regions. It survives well in water and in many different soil types and on alternative hosts [...] xylem, causing bacterial wilt and brown rot in a very wide range of potential host plants. Damage symptoms In potato, field symptoms of Ralstonia solanacearum

• Rhizoctonia solani

  res. These spores don’t play a role in the epidemics or dispersal of the fungus, only the mycelium is important in this context. Thanatephorus cucumeris [...] soil-inhabiting fungus, that is very persistent in the soil. It overwinters as mycelium or sclerotia in the soil and on crop residues. It is also seed-borne [...] cucumeris depend on the time of infection. In general, the fungus causes symptoms on all plant parts that are in or close to the soil. Early infection of

• Crazy roots, hairy roots, crown gall

  growth (crazy roots). In greenhouse vegetables, the roots overgrow the substrate and in severe epidemics the drippers get clogged. In tomato, excessive vegetative [...] caused by a change in the hormonal system of the plant resulting from the Rhizobium infection. Rhizobium rhizogenes puts a Ri-plasmid in the plant tissue [...] gutters etc. Adjust the work order in greenhouses to fit with the hygiene protocol Disinfect the nutrient solution in order to prevent biofilm growth inside

• Unprecedented Journey for Future Leaders

  July 24, 2018

  Jungle Talks, in close cooperation with leading horticultural companies Koppert Biological Systems, Ridder Group and also the Rabobank, is organizing the [...] the first edition of the Pro Manager Mastercourse – Floriculture. The course (28 October to 10 November 2018) is open to future floricultural leaders between [...] years old from around the globe, with a minimum of 5 years working experience in a leading position within a future proof producer of ornamentals . The working