August 6, 2008

Protecting Against Chrysanthemum White Rust

The American Nursery & Landscape Association (ANLA) and the Society of American Florists (SAF) are offering two final education Webinars on chrysanthemum white rust. The Webinar is a free 30-minute seminar conducted in person by Jane Trolinger, diagnostics and audits manager at Yoder Brothers, who will offer important advice on how to avoid CWR on your 2008 mum crops. Both Webinars will take place Tuesday, August 12. The first is at 10 a.m. EDT, while the other is at 2 p.m. EDT. Click on the respective link to sign up for a session.

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July 9, 2008

Flagship Granules Approved For California Use

Flagship G can be added directly to plant containers, broadcasted or mixed into growing media. It also features the same spectrum and speed of control as Flagship WG, the existing wettable granule formulation. “Flagship G offers nursery and greenhouse growers tremendous flexibility because it can be applied using a wide range of methods,” says Eduardo Moreira, ornamental market manager for Syngenta. For more information about Flagship G insecticide or other products from Syngenta, click here.

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June 18, 2008

Impact Of Fungicides On Natural Enemies

Previously, I have written articles on the compatibility of alternative pesticides, primarily insecticides and miticides, with biological control agents or natural enemies such as parasitoids and predators. In general, natural enemies tend to be more susceptible to insecticides and miticides than insect and mite pests. However, fungicides are applied routinely in greenhouses to control both aboveground and belowground fungal pathogens. So how compatible are fungicides with natural enemies? Although fungicides may not be directly or immediately harmful to a specific natural enemy, there may be indirect or sublethal effects, such as delayed development of the prey and natural enemy, delayed adult emergence of the natural enemy or decreased natural enemy survival. There is, in general, less information on the direct (immediate) and indirect (sublethal) effects of fungicides on natural enemies. In fact, both the Koppert and BioBest Side Effects Manual/Guide contain minimal information on the effects of fungicides on many […]

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June 17, 2008

Protecting Against Root Rot

Root rot is a continuing problem for today’s ornamental growers. Hurricane fungicide, a new addition to the Syngenta ornamental portfolio, provides effective, easy control of all major root rot diseases, including Pythium, Phytophthora and Rhizoctonia. Hurricane eases the challenges of identifying these various root rot diseases. Hurricane fungicide provides both systemic and contact protection — two different modes of action. This combination of two premiere active ingredients provides optimal, lasting and cost-effective fungi control. Hurricane can be applied to the roots of the plants by drenching using microjet, drip irrigation or with hydraulic systems. It can also be incorporated as a pre-potting media drench. Hurricane can be enhanced to treat stem disease as well, by tank mixing with Medallion to control Thielaviopsis, Cylindrocladium and Sclerotium rolfsi. Syngenta’s Ornamental Market Manager Eduardo Moreira says, “Effective root rot disease control is essential to ensure that growers remain profitable. Hurricane offers growers an easier […]

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June 16, 2008

Preventing Rot & Spot

Reduce Labor Costs BASF: Insignia fungicide controls a broad range of ornamental diseases and provides long-term results. Insignia has shown residual control on many ornamental diseases, reducing labor and materials costs. Cygnus fungicide offers economical, effective control of powdery mildew, rusts, scab diseases and leaf spot diseases in greenhouses, retail nurseries, non-residential landscape ornamentals and nursery crops. For more information, call 800-545-9525 or visit www.basf.com.  No Tolerance For Pests Biosafe Systems: ZeroTol Broad Spectrum Algaecide/Fungicide from BioSafe Systems helps greenhouses and nurseries achieve disease control in all phases of production. ZeroTol is EPA approved for killing algae, fungi and spores on plant material, hard surfaces and in water. For more information, call 888-273-3088 or visit www.biosafesystems.com. Preventing Root Disease Bioworks: PlantShield HC, a biological fungicide for root disease prevention in greenhouse, nursery and vegetable crops, prevents pythium, fusarium, rhizoctonia, thielaviopsis and cylindrocladium, reduces control costs — one application lasts 10 to […]

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June 16, 2008

Bacterial Blight Breakthrough

Geranium growers all over the world may soon be sleeping more easily, thanks to a revolutionary new test to screen geranium and pelargonium species for Xanthomonas — the swift-moving bacterial blight that can wipe out an entire crop. The work conducted by scientists at the University of Toledo (UT) in Toledo, Ohio, was funded through a USDA Agricultural Research Service cooperative agreement. Dr. Shulu Zhang of Louisiana State University managed the project while he was at UT’s Plant Science Research Center along with Dr. Stephen Goldman of UT and Dr. R.V. Sairam at Penn State University. Grower Bill Bettinger of Toledo also supported the project. The scientists have developed a rapid, reliable test that is specific to 53 strains of Xanthomonas campestris pv. pelargonii (Xcp) but not to 46 other Xanthomonas species. Using Polymerase Chain Reaction (PCR) technology, the test detects a gene to signal the presence of XCP and then […]

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May 14, 2008

New Fungicide From BioSafe Systems

BioSafe Systems recently launched TerraClean Broad Spectrum, a fungicide formulated for control on a variety of soil-borne pathogens. It’s designed for applications through drip irrigation systems, and it can be applied to control Pythium, Phytophthora, Rhizoctonia, Verticillium and Fusarium. TerraClean can be applied at planting until plants are mature because it has a zero-hour REI and no mutational resistance. At planting, it can be added to setting water for banded or drench applications. For more information, go to www.biosafesystems.com.

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May 7, 2008

Rapid Test For Hosta Virus X Detection

Plants infected with Hosta Virus X don’t always exhibit symptoms, but a test strip that Agdia recently developed can detect HVX even when infection isn’t exactly recognizable. The Agdia HVX ImmunoStrip is designed to deliver on-the-spot results and takes just minutes to work. The ImmunoStrip has a guaranteed shelf life of one year and is portable, which means tests can be administered before purchasing plants or accepting shipments. Tests can help monitor plants throughout the season, as well, and they work with leaf or root material. For more information about the Agdia HVX ImmunoStrip or other Agdia products and services, go to www.agdia.com.

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March 26, 2008

New Fungicide Hits The Market

BASF Turf & Ornamentals recently launched Stature SC fungicide, a new liquid flowable formulation of dimethomorph that greenhouse and field and container nurseries can use to preventatively control phytophthora and downy mildew diseases. Stature SC is a Group 40 fungicide that can be measured in small or large amounts and applied as a spray, drench or through chemigation. The new formulation mixes faster as a liquid suspension and its 25-flow-ounce package size fits all ornamental operations. For more information about BASF Turf & Ornamentals, go to www.betterturf.com or www.betterplants.com.

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March 26, 2008

MIDAS Registered In 29 States

MIDAS, a broad-spectrum soil fumigant that controls a broad range of soil-borne diseases, nematodes, weed seeds and insects that threaten high-value crops, has been given the green light for commercial use in 29 states. “The growers who have used MIDAS are seeing positive results in efficacy and yields,” says Mike Allan, Global Product Manager for MIDAS. “We are pleased that state officials have allowed more growers to experience these benefits.” In recent studies conducted by the University of Georgia, researchers pitted Midas, DMDS and Telone II against methyl bromide and found MIDAS to be the most effective replacement. “These results are the same as what we have been seeing with MIDAS in our expanded EUP studies,” Allan says. “And with full commercial registration for MIDAS in many states, growers finally have a new fumigant tool that provides a good foundation for their crops.” Midas can be purchased in Colorado, Connecticut, […]

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February 20, 2008

Help Wanted: Geranium Growers

Scientists at the University of Toledo (UT) are looking for geranium growers to participate in a study using a revolutionary new test to screen for Xanthomonas, the swift-moving bacterial blight that can wipe out an entire crop. The work was funded through a USDA Agricultural Research Service cooperative agreement. Dr. Shulu Zhang of Louisiana State University managed the project while he was at UT’s Plant Science Research Center along with Dr. Stephen Goldman of UT and Dr. R.V. Sairam at Penn State University. Grower Bill Bettinger of Toledo also supported the project. The scientists have developed a rapid, reliable test that is specific to 53 strains of Xanthomonas campestris pv. pelargonii (Xcp) but not to 46 other Xanthomonas species. Using Polymerase Chain Reaction (PCR) technology, the test detects a gene to signal the presence of XCP and then scores infection based on symptom severity. The test defines the presence of […]

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November 28, 2007

Act Now To Get Ralstonia Unlisted

Now is the time for growers to ask USDA to remove Ralstonia solanacearum, Race 3, Biovar 2 (R3B2) from the bioterrorism list. USDA’s Animal and Plant Health Inspection Service is calling for public comments on its list of “Select Agents”—diseases that are listed under the Agricultrual Bioterrorism Protection Act of 2002. The deadline to respond is Monday, December 3, at midnight. Detailed scientific comments have been submitted by leading Ralstonia researchers, according to the Society of American Florists (SAF), but USDA needs to hear from industry members related to the economic impact and the impact on the geranium industry, specifically, of continuing to have Ralstonia on the bioterrorism list. This strain of the disease is already considered a quarantine pest, but adding it to the “select agent” list has inflicted an unnecessary and unjustified layer of protection which is actually harming agriculture and our growers. When R3B2 was accidentally introduced […]

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