Despite efforts to thwart downy mildew, growers, researchers and landscape experts are predicting a continued impact on Impatiens walleriana supply issues for the 2014 season.
Between warnings from garden writers and the national media and extensive signage at garden centers and retail outlets, the public was well aware of a problem with Impatiens walleriana this year. “Some people reported they couldn’t sell the Impatiens walleriana they grew because the press had been so alarming to gardeners that they weren’t purchasing
The American Floral Endowment (AFE) has released two new research reports to help the industry better respond to downy mildew and powdery mildew: • Understanding Coleus Downy Mildew: Special Research Report #134• Understanding Gerbera Powdery Mildew: Special Research Report #135 In Report 134, Blair Harlan and Mary Hausbeck from Michigan State University examine downy mildew
With more than half of the country impacted by impatiens downy mildew in 2012, it’s a bit of a relief to hear that – so far – confirmed reports of the disease appear to be much lower in 2013. According to a presentation by Ball Horticultural Company’s Colleen Warfield and Cornell’s Margery Daughtrey at OFA
Impatiens downy mildew has been found in Michigan, according to a brief from Michigan State University Extension. “In the last two weeks, downy mildew on impatiens has been confirmed in Michigan greenhouses spanning four counties,” the report states. “In each case, the disease was widespread within the greenhouse and the losses were nearly 100 percent.”
The devastating impatiens downy mildew disease has been found in Ohio for the 2013 growing season, according to a report from The Ohio State University Extension. “In the last seven to ten days there have been several reports of impatiens downy mildew’s appearance in the Midwest; as of this time we have two reports from
Editor’s Note: This article was written with the assistance of Ball Horticultural Company’s “Grower Guidelines” on Impatiens Downy Mildew and plant pathologist Dr. Colleen Warfield. For the most recent version of grower and retail guidelines, visit www.ballseed.com. Impatiens downy mildew is a destructive foliar disease of Impatiens walleriana that is capable of causing complete defoliation
Downy mildew on Impatiens walleriana has been confirmed in more than 30 states, primarily in the eastern half of the United States. In 2012, the disease first started to be seen in Florida and then made appearances up the East Coast and in the Midwest during the spring and early summer. Landscapes in drier areas
Impatiens downy mildew was one of the biggest disease stories of 2012, and the potential for more issues next spring has growers considering new ways to manage the situation. Impatiens walleriana is traditionally a big crop for Top 100 Grower Kube-Pak, in Allentown, N.J. Greenhouse Grower asked president Bill Swanekamp to talk about his plans
Impatiens Downy Mildew Found In OhioApril 16, 2013 | The Ohio State University Extension encourages growers to begin preventative treatment now. Everything You Need To Know About Impatiens Downy Mildew Dec. 6, 2012 | Ball Horticultural Company gives growers quick facts about the disease plaguing the country’s most popular bedding plant. How To Grow SunPatiens Dec.