Better fungicides and smart rotations can reduce the impact of downy mildew. Colors Violet Shades, Salmon, Carol and Orange will round out the series that is low spreading. This downy mildew infects impatiens (Impatiens walleriana), or balsam impatiens (Impatiens basamina). All varieties of Impatiens walleriana and any hybrid with I. walleriana in its background are susceptible to impatiens downy mildew. New Guinea impatiens and a hybrid line of impatiens called SunPatiens are resistant to this strain of downy mildew. At HGIC we received our first questions on impatiens downy mildew in July of 2012 and have had reports of it each summer since then. Proven Winners® Spring National Combo Above and Beyond. Downy mildew is a devastating disease that can quickly kill an entire planting of impatiens or basil. Pictured: Frank Riteco and his '80s throwback shirt, with a twist. Just like Wild Romance before it, Rollercoaster was the first plant attendees saw as they walked through the displays. Impatiens downy mildew (IDM) is the fungal pathogen Plasmopara obducens that specifically impacts Impatiens walleriana. Impatiens growing in the sun were dying after getting downy mildew while those in the shade were unaffected. This can be accomplished by heating and ventilating, along with increasing horizontal air flow. New Guinea impatiens (I. hawkerii) is highly resistant. This is a fungus-like water mold with the scientific name Plasmopara obducens. They are self-cleaning and not as susceptible to Botrytis as less compact double petunias. 1. California Spring Trials Ball Horticultural, California Spring Trials Windmill Nursery, Dümmen Orange unveiled New Guinea impatiens with a unique flower form called Wild Romance, Sponsored: 2020 Spring Trials Preview: Sakata, © 2020 GIE Media, Inc. All Rights Reserved. More information about the new impatiens for growers, home gardeners and landscapers is available at http://beaconimpatiens.com. Until several years ago, traditional impatiens (Impatiens walleriana) were the norm with their easy-to-grow, self-seeding habit. The pathogen has not been found to infect I. hawkeri, I. omeiania, I. repens, or I. morsei ‘Velveta’. For the diehard poinsettia people, Riteco says many of these plants can be mixed with the traditional holiday crop for high-value combinations. You might have had a downy mildew attack, aka The Impatiens Plague! Beacon Impatiens offers season-long performance and brings back fast-filling color to the shade, without the disease risk. Vepita Up, a new series of verbena, offers four colors: Burgundy, Lavender, Hot Pink and White. Paradise Rococo is a whole new line of New Guinea Impatiens with ruffled flowers, offered in multiple colors, including Bright Red, Violet, Coral and White, Kientzler says. Impatiens downy mildew ( Plasmopara obducens) has been confirmed on Impatiens walleriana from landscapes in Oregon. Gardeners can safely plant New Guinea impatiens ( Impatiens hawkeri ), as well as hybrids such as SunPatiens® and the new hybrid Bounce™ that are resistant to impatiens downy mildew. It is compact in the greenhouse but becomes more vigorous as it makes its way through the supply chain, says Andreas Kientzler, owner of Kientzler North America. This one has blooms with a pronounced ruffled edge and more compact habit. The culprit was impatiens downy mildew disease. Bounce Violet. The goal is to introduce more varieties so that Beacon has a robust selection like Super Elfin, an I. walleriana with the branching and vibrant colors of Beacon, but not the disease resistance. It works great for larger formats and upgraded planters. The first Impatiens walleriana with a high degree of resistance to downy mildew. Infinity ® New Guinea Impatiens: the simplest switch out is to the Infinity ® series of New Guinea Impatiens which are not susceptible to Downy Mildew. Rollercoaster Hot Pink New Guinea impatiens features a double bloom with a ruffled edge. 1  The particular mildew affecting impatiens is Plasmopara abducens. GARY CHURCH: Mildew-resistant impatiens will save call to the plant coroner By Gary Church Impatiens downy mildew is a destructive foliar disease of Impatiens walleriana.While there have been sporadic reports of this disease in production greenhouses in the United States since 2004, widespread regional outbreaks of impatiens downy mildew were observed for the first time in North American landscapes in 2011. There's been an increase in downy mildew affecting Impatiens plants recently. After 10 years of breeding work, PanAmerican Seed debuted an Impatiens walleriana at the 2019 California Spring Trials that the company says has proven resistance to Impatiens Downy Mildew. Finally, Pan American Seed has developed a downy mildew resistant variety of traditional impatiens, which they released this fall, and other companies are likely to roll out their own versions this spring. PanAmerican showcased the new Beacon Impatiens series that features six colors and two mixes at the 2019 California Spring Trials. Impatiens downy mildew is best prevented by implementing good cultural management practices. He’s marketing white lilies, Iberis and Senecio Angel Wings for a fresh approach to holiday sales. After the initial outbreak starting in 2011, many gardeners were instructed to stop planting Impatiens walleriana until a solution was found. A white film glossed the underside of the leaves, a classic symptom of the infection. According to an article in Greenhouse Management published in July 2018, the Horticultural Research Institute says that Plasmopara obducens has been known to exist in the U.S. since the 1880s, when it was first discovered on a native impatiens called orange jewelweed. Beacon, a 2020 global introduction, will debut in six colors, which include popular Bright Red and White, and two mixes. This built-in resistance now gives garden Impatiens a fighting chance to flourish in gardens and landscapes where non-resistant varieties have previously succumbed. Jewel weed, I. capensis, may become infected but not sporulate. Lisa Lacy, global product manager for PanAmerican, pointed to one of the yellowing leaves on the otherwise robust Beacon plants and explained that it is a sign the plant is fighting the disease, and Beacon will eventually drop any leaves affected to prevent an outbreak. Unfortunately, downy mildew disease took them out of production nationwide. Part of the Beacon program will include a philanthropic initiative, as 3 percent of the yearly global sales of Beacon will be donated to lesser-known charities to help "shine a light" on their work. Frank Riteco, owner of 2Plant International in Powell, Ohio, wants growers and retailers to have a white Christmas. SunPatiens, a hybrid impatiens developed by Sakata Seeds, is reported to be resistant. Harris Seeds is a privately owned seed company with a long tradition of supplying the finest vegetable seeds, flower seeds, plants and supplies to growers and gardeners since 1879. See his explanation of inoculation trials and how Beacon Impatiens pass the test. New Guinea impatiens and other bedding plants are not susceptible to this downy mildew (but they may have their own downy mildews). The new Rollercoaster Hot Pink New Guinea Impatiens were presented on tracks with a dramatic drop, curve and incline. Michelle Simakis, Lindsay Pangborn, marketing manager for Dümmen Orange, says Rollercoaster enjoyed a successful debut in Europe and there are plans to add more colors to the shade-loving series suitable for the landscape or containers in the coming years.Â. The breeder showcases new varieties for 2020 at the Windmill Nursery Spring Trials Stop. Please click here for announcements regarding COVID-19. There are unconfirmed reports of the pathogen in landscapes in the Portland Metro, Salem, and Corvallis areas. At the 2017 California Spring Trials, Dümmen Orange unveiled New Guinea impatiens with a unique flower form called Wild Romance. 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