• Black leg of seedlings

  substrate the plant turns brown. A typical symptom of a Pythium infection is the easy stripping of the skin from the root cortex with a finger nail. Life cycle [...] General Pythium is considered a ‘weak pathogen’, meaning that it can usually only affect plants that are in a sub-optimal condition or suffer from stress [...] of seedlings Pythium belongs to the Oomycetes, a separate group of microorganisms and is therefore not a real fungus. It survives as oospores, resting spores

• Bacterial wilt, brown rot

  solanacearum is a plant pathogenic bacterium. It is a soil-borne disease and colonises the xylem, causing bacterial wilt and brown rot in a very wide range [...] Ralstonia solanacearum is a quarantine organism in Europe and considered a bioterrorist organism in the United States. It is a commonly found soil-inhabitant [...] tomato. Whereas other races have optimum temperatures of 35-37 °C, the optimum for Race 3 is 27 °C, which makes it more dangerous in temperate regions. It survives

• Manual Wireless Beehome

  transmitter will be shut down during a power cut. If you are not using a timer, the transmitter will not emit a signal during a power cut (the closing mechanism [...] Transmitter Attach the transmitter to a pole along the aisle in a central area in the greenhouse. The transmitter has a range of approximately 100 metres in [...] the transmitter with a timer 13 Recommended opening and closing times for hives (timer) 13 Controlling the transmitter with a climate computer 13

• Downy mildew of Cucurbits

  prevent Downey mildew Choose resistant cultivars Use a wide crop rotation with non-host crops Prevent a humid microclimate. Achieve this by lowering crop [...] General Pseudoperonospora cubensis is a plant pathogen causing downy mildew on cucurbit crops like cucumber, cantaloupe, pumpkin, watermelon and squash [...] is required. For most downy mildews, the optimum temperature is around 15 o C and the closer the temperature is to this, the shorter the leaf wetness period

• Podcast with Tech OnDemand: Bill Calkins interviews Jeremy Webber, National Ornamental Team Manager

  December 15, 2024

  looking for an interesting listen there’s a two-part episode of Tech On Demand from GrowerTalks Magazine featuring a special guest, Jeremy Webber, Koppert's [...] greenhouse professional’s mind, and more are considering bios every year. Jeremy has extensive experience in the industry, as a grower and as a trusted biocontrol [...] biocontrol advisor. He’s worked with greenhouses of all sizes, growing a wide range of crops—edibles, ornamentals , cannabis, and more—and developing and implementing

• Koppert introduces Natutec Drive

  December 29, 2020

  offers growers a dispersal system that makes the release of beneficial insects even more accurate, evenly spread and labor-saving. While Koppert’s Natutec Scout [...] and other insects from a tractor or other suitable vehicle. Customized vehicle or on existing farming equipment Natutec Drive is a tool with patented technology [...] various carrier materials from a moving vehicle via ventilated air tubes to the crop. The essential part of Natutec Drive is a ‘box’ with tubes that effectively

• Crazy roots, hairy roots, crown gall

  seems to be 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 and causes a genetic change in the plant. How to prevent Crazy roots, hairy roots, crown gall Use clean propagation material Use a strict hygiene protocol [...] established inside root nodules of legumes. Additionally, pathogenic Agrobacterium s pecies have recently been assigned to the genus Rhizobium . These pathogenic

• Swirski-Mite Helps You Stay in Control

  August 18, 2021

  circumstances, other possibilities As a grower, you are often also a strategist – and fighting pests requires a different strategy in every situation. [...] Sometimes responding quickly to a pest is a must, other times you want to slowly build up a standing army of predatory mites that is ready and waiting [...] these different strategies. The regular Swirski-Mite is contained in a bottle with a handy dosing cap, making it very easy to scatter the predatory mites

• Bacterial canker of tomato

  disinfect tools and greenhouse structures Use a crop rotation in field crops of at least two years and alternate with a non-host crop Apply deep-ploughing to stimulate [...] General Clavibacter is a quarantine organism in Europe, which means that strong efforts are used to prevent the bacterium from entering. When the occasional [...] entirely or, if the crop is old, only the plants in the infected area, with a substantial buffer zone. Replanting can only take place after thorough disinfection

• Powdery mildew

  General Powdery mildew is a fungal disease that is caused by many different species of fungi such as Erysiphe, Podosphaera, Oïdium, Leveillula. Damage [...] underside of the leaf. On the upper side, yellow spots are noticeable. In case of a severe epidemic, the fluffy colonies also appear on the upper side of the leaves [...] meaning they feed on living plant cells and barely survive in the absence of a living crop. They survive as ascospores or perithecia, structures containing