February 4, 2013

Keep Plants Healthy With These 7 Products

Micora Fungicide GreenCastOnline.com/micora Micora fungicide from Syngenta provides long-lasting preventive protection on foliar, stem and root diseases caused by downy mildew fungi and Phytophthora spp., including P. ramorum and curative control when applied one to two days after infection. Micora provides outstanding preventive protection and control at low-use rates, and it has no negative effects on beneficial insects, making it an ideal tool for integrated crop management programs. It is labeled for use on ornamental crops as well as certain vegetables grown for resale as transplants.

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February 4, 2013

Reducing The Spread Of Rose Rosette Disease

The recent release of new hybrid landscape roses, including the Flower Carpet and Knock Out series, has raised interest in these ornamental plants for growers, landscapers and homeowners. According to the USDA-National Agricultural Statistics Service’s Nursery Crops 2006 Summary, deciduous shrubs, including roses, accounted for $648 million in gross sales. Deciduous shrubs were the second largest contributor to sales — behind broadleaf evergreens with sales of $839 million — and accounted for 14 percent of the nursery sales total. But as breeders continue to develop rose varieties that are more disease resistant and easier to grow, one disease continues to elude their efforts to hybridize resistant varieties: rose rosette disease. Symptoms Vary Based On Rose Species, Cultivar Although symptoms of this disease were seen as early as the 1940s, the cause of rose rosette was not reported until 2011. Researchers at the University of Arkansas identified a negative-sense RNA virus […]

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January 7, 2013

Schmidt Brothers’ Strategy For Dealing With Impatiens Downy Mildew

From being vigilant about disease control to ramping up production of alternative varieties, listen to Mike Schmidt talk about how Schmidt Brothers will deal with downy mildew on impatiens in 2013.

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January 1, 2013

To Grow Or Not To Grow

Despite well-documented cases of impatiens downy mildew, impatiens still tops the list of bedding plants in terms of flats sold. Based on the 2011 Floriculture Crops Summary, 8,353,000 flats were sold in the USDA’s 15-state sample. In the potted plants category, impatiens are in fifth place behind vegetative geraniums, pansies, petunias and seed geraniums (in that order). They’re fourth in quantity sold among annual bedding plants in hanging baskets after petunias, vegetative geraniums and New Guinea impatiens. Impatiens walleriana is clearly still a mainstay crop for many growers. The dilemma that many face is what to do this season. In general, consumers are not very aware of the disease and will still be expecting to purchase impatiens this spring. Many retailers are aware, and some still want to provide what their customers are looking for. Landscapers in affected states will probably stay away from impatiens, since damage is most severe […]

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December 12, 2012

OHP Launches Marengo Ornamental Herbicide

OHP Inc. announces the introduction of Marengo Herbicide to growers in the production ornamental market. Marengo has received its federal EPA registration and is undergoing the state registration process. Marengo, with the exciting new active ingredient indaziflam, is a selective pre-emergent herbicide that offers long-term residual control of both grassy and broadleaf leaves. “We are thrilled to add Marengo to our expanding herbicide portfolio,” says Dan Stahl, OHP vice president of marketing and business development. “Marengo offers unparalleled residual control of many hard-to-control weeds with impressive plant safety.” Marengo contains the first active ingredient from Mode of Action Group 29. The active ingredient prevents weed seed germination by inhibiting cellulose biosynthesis. Marengo does not move once applied to the soil and does not volatilize. Marengo is registered for use on production ornamentals grown in outdoor nurseries, as well as on conifers, Christmas trees and ornamental production sites and hardscapes. Marengo […]

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December 11, 2012

Downy Mildew Of Rose

What does downy mildew look like on rose? It can often be confused with other conditions. Take a look at rose downy mildew’s symptoms, the conditions in which spores germinate and fungicides to use in this episode of FloriCAST.

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December 3, 2012

Everything You Need To Know About Impatiens Downy Mildew

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 or plant collapse, especially in landscape plantings under moist conditions and cool nights. While there have been sporadic reports of impatiens downy mildew in U.S. greenhouses since 2004, it was not until the summer of 2011 that regional outbreaks of this disease were seen for the first time in landscape beds and container plantings in North America. In early January 2012, outbreaks of impatiens downy mildew were observed in landscape beds and greenhouses in south Florida. It is unclear whether this was a continuation of the 2011 outbreaks or a new cycle of disease for […]

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December 3, 2012

How To Grow SunPatiens

As part of an innovative breeding project, Sakata Ornamentals created an impatiens plant with a vigorous root system that can truly withstand and thrive in full sun, partial shade and heat.

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December 3, 2012

Growers Look To Limit Downy Mildew Losses

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 in the East were affected by the disease in late summer. Impatiens downy mildew also appeared in Texas, Washington, Oregon and the Gulf Coast states in 2012. “The disease was identified in only 13 states in 2011 and in 33 states in 2012,” says Margery Daughtrey, senior extension associate at Cornell University’s Long Island Horticultural Research and Extension Center in Riverhead, N.Y. “Even though a state was noted as having the disease, that doesn’t mean the entire state was affected. It means that a particular state had a case reported. It could have just been […]

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December 3, 2012

Lobelia Offers A Downy-Mildew-Resistant Option

Consider vegetative lobelia, such as the Techno and Techno Heat series from Syngenta Flowers, as a vivid and versatile alternative to Impatiens walleriana. The two series give consumers a long-lasting and low-maintenance color show in containers, combos and borders. Both Techno and Techno Heat deliver award-winning garden performance. For spring and summer sales, we recommend lobelia for all regions of the U.S. and Canada, in shade or part-shade. Lobelia is also well suited for fall and winter use in the southern regions of the U.S. The Techno and Techno Heat series are early to flower and day-length neutral, working well for all turns in 4- and 6-inch programs. Lobelia Propagation Tips Upon Arrival: Stick relatively quickly and get cuttings hydrated as soon as possible. Only store unrooted cuttings overnight in a cooler if necessary. Cuttings can easily dehydrate. Rooting Time: Unrooted cuttings typically take about three and a half to […]

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November 16, 2012

A Look Inside Crop Protection At Stacy’s Greenhouses

Tackling disease and insect control at Stacy’s Greenhouses means being attuned to greenhouse crops, but also managing re-entry intervals, as well as integrated pest management. Take a listen to how Stacy’s handles it all from head grower Billy Morrow.

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