ORNAMENTALS - SCAB, POWDERY MILDEW, LEAF SPOT, RUST, ANTHRACNOSE AND DOWNY MILDEW CONTROL

General Information

GENERAL INFORMATION

For use on ornamentals in greenhouses, lath- and shadehouses, outdoor nurseries, retail nurseries and other nonresidential landscape areas.

This package contains Cygnus, a 50% water dispersible granule (WG). Cygnus is a foliar fungicide that has protective, and curative activity against powdery mildews, and protective activity against certain leaf spots, rusts, anthracnoses and downy mildews. For best results against powdery mildews, leaf spots, rusts, anthracnoses and downy mildews, a protective barrier of Cygnus must be established and maintained on the plant surface.

Mode of Action

Kresoxim-methyl, the active ingredient in Cygnus, belongs to the group of respiration inhibitors classified by the U.S. EPA and Canada PMRA as Quinone Outside Inhibitors (Qol), or Target Site of Action Group 11 Fungicides.

Crop Tolerance

The phytotoxic potential of Cygnus has been assessed on a wide variety of common ornamental plants.

However, not all plant species and their varieties and cultivars have been tested for tolerance to Cygnus. In addition, all possible tank mix combinations, sequential pesticide treatments, and adjuvants or surfactants have not been evaluated. Local conditions can also influence crop tolerance and may not match those under which BASF has conducted testing.

Therefore, before using Cygnus, test the product on a sample of the crop to be treated to ensure that a phytotoxic response will not occur.

Sensitive Crop Precaution

Cygnus may cause injury to Asian pear of variety \"Olympic\" and certain sensitive sweet cherry varieties such as Angela, Chelan, Somerset, Sweetheart, Valera, Van, Vandalay, Vista, Cavalier, Coral Champagne, Emperor Francis, Royalton, Schmidt, Summit, and Viva. Consult a BASF representative or local agricultural authorities for more information concerning additional cherry varieties that may be sensitive to Cygnus. Use special care when applying Cygnus to prevent contact with the sensitive plant species and varieties listed in Table 3. Avoid off-target movement.

Resistance Management

Cygnus contains Kresoxim-methyl, a group 11 fungicide, and is effective against pathogens resistant to fungicides with modes of action different from those of Qol fungicides (Target site group 11), such as, dicarboximides, sterol inhibitors, benzimidazoles, or phenylamides. Fungal isolates resistant to group 11 fungicides such as, kresoxim-methyl, azoxystrobin, trifloxystrobin, and pyraclostrobin, may eventually dominate the fungal population if group 11 fungicides are used predominantly and repeatedly in the same field in successive years as the primary method of control for the targeted pathogen species. This may result in reduction of disease control by Cygnus or other group 11 fungicides.

To limit the potential for development of resistance to Cygnus and other group 11 fungicides:

- For outdoor use, do not make more than six applications of Cygnus or other strobilurin fungicides per season.

- For use in greenhouses, do not make more than eight applications of Cygnus or other strobilurin fungicides per year.

- For powdery mildew control, alternate each application of Cygnus with two sequential applications of labeled non-strobilurin fungicides with a different mode of action.

- For control of scab, leaf spots and rusts, do not make more than two sequential applications of Cygnus. Then alternate to at least an equal number of sequential applications of labeled nonstrobilurin fungicides with a different mode of action before applying Cygnus again.

Application Instructions

For the control of scab, apply 1.0–1.6 ounces of Cygnus per 100 gallons of water at 10-14 day intervals as a preventative treatment. Start applications at bud break or when environmental conditions are favorable for disease development. Use the higher rate of Cygnus when heavy infection pressure exists or is anticipated.

For the control of rose black spot and ornamental leaf spots, apply 1.6-3.2 ounces of Cygnus per 100 gallons of water at 7-14 day intervals as a preventative treatment.

For the control of powdery mildew, apply 1.6-3.2 ounces of Cygnus per 100 gallons of water as a preventative treatment or at the first signs of disease.

Applications made at the first signs of powdery mildew will require higher rates and shorter spray intervals.

The addition of up to 0.06% of a non-organosilicone spreader-sticker type adjuvant may improve powdery mildew control. Do not use organosilicone-based adjuvants with Cygnus.

For the control of rusts, anthracnose and downy mildew, apply Cygnus only as a preventative treatment at 3.2-6.4 oz per 100 gallons of water at 7-10 day intervals. The addition of up to 0.06% of a non-organosilicone spreader-sticker type adjuvant may improve rust control. Do not use organosilicone-based adjuvants with Cygnus.

Spray to the point of drip for all applications, making sure not to exceed the maximum seasonal use rate.

Refer to Table 1 in the label for specific recommendations for disease control.

Coverage

Apply the appropriate amount of spray solution to cover the foliage to the point of drip. Thorough coverage of all plant surfaces is required for optimum disease control.

For tank mix application instructions, please refer to the label.

Limitations, Restrictions, and Exceptions

General Restrictions and limitations ( Greenhouse and Outdoor use)

- Do not apply to crops subjected to stress conditions such as excessive heat, as crop injury may result.

- Do not apply to crops that show injury (leaf phytotoxicity or plant stunting) produced by prior pesticide applications, because this injury may be enhanced or prolonged.

- Do not apply this product as a smoke, mist, fog or aerosol (Greenhouse only).

- Do not apply through any type of irrigation equipment.

- Do not use fruit from ornamental plants for food or feed purposes.

- Cygnus is not for sale, distribution, or use in Nassau and Suffolk Counties in New York State.

- Do not make more than 8 applications of Cygnus per year (for Greenhouse).

- Do not apply more than a total of 25.6 ounces (1.6 pounds) of Cygnus per acre per season (for Outdoor).

Method
Restricted Entry Interval

12 hours

Timings