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Foliar diseases include Flower Blight, Botrytis, Leaf Spot and Blights, Powdery Mildew, Rusts, Scabs, Blackspot, Anthracnose, Downy Mildews, Alternaria and many others. Early detection and proper identification is the key to good plant disease control.

Many fungicides work best as a preventative and therefore knowing the conditions that cause some of the diseases is very important. Recognize these conditions and treat accordingly. Scouting is also a very effective tool and should be implemented.

If you are uncertain of the disease, contact a local extension person and have the problem identified.

Compass™ 0 50 WDG — Strobilurin Fungicide
For control of certain foliar, stem and root diseases of ornamentals grown in interiorscapes, field nursery plantings, forest nurseries and greenhouses, lath and shadehouses, containers and other enclosed structures.

Rates: 1 to 4 oz. for foliar diseases (see Soil Born Diseases for others)
Signal Word: Caution REI: 12 hours

Compass O will control foliar diseases of ornamentals when applied as a foliar spray. Apply preventatively to the point of drip and repeat at 7 to 14 day intervals until the threat of disease is over. Start application when conditions are favorable for disease development and continue until the threat is over.

Foliar Diseases Control includes: Anthracnose, Blackspot, Botrytis, Downy Mildew, Leaf Spot, Powdery Mildew, Rust and Scab.

Compass O should be applied no more than two applications before rotating to another effective product that is not in the strobilurin class of chemistry. Always read the label.

Compass is a trademark of Bayer Corp.

OHP 6672™ 50 W and OHP 6672™ 4.5 L — Ornamental Fungicide
For broad-spectrum prevention and control of diseases of annual and perennial flowers, ground covers, plus deciduous and evergreen trees and shrubs. OHP 6672 50 W and 4.5 L are effective on a wide variety of ornamental diseases in both the greenhouse and nursery. The active ingredient for OHP 6672 is thiophanate-methyl.

Signal Word: Caution REI: 12 hours
Use sites include nursery, greenhouse, landscape and interiorscape use on woody (shade, conifer fruit and nut trees) and herbaceous ornamentals (including perennials, bulb, annuals and bedding plants).

Application can be made by aerial spraying; ground spraying from truck, backpack or hand-held sprayers; drench treatment for seedlings; and chemigation through sprinkler irrigation systems (not in California).

Rates for OHP 6672 50 W:

• Foliar spray applications range from 8 to 24 ounces per 100 gallons.
• Drench applications range from 12 to 16 ounces per 100 gallons.
• Dip applications range from 16 to 24 ounces per 100 gallons.
• Apply when disease first appears or at bud break.
• Repeat at 10 to 14 day intervals, shorten interval during humid, rainy weather.

Rates for OHP 6672 4.5 L:

• Ground foliar spray at 20 fl. oz. per 100 gallons for most diseases. For Botrytis and Powdery Mildew use 10 fl. oz. per 100 gallons.
• Drench applications should be made at 20 fl. oz. per 100 gallons.
• Dip application rates range from 20 to 33 fl. oz. per 100 gallons.
• Aerial application rates are 10 to 20 fl. oz. per acre.

OHP 6672 50 W and 4.5 L require continuous agitation to keep material in suspension. Do not tank mix with highly alkaline pesticides such as Bordeaux mixture or lime sulfur. No claim of compatibility with any other pesticides is implied.

Additional surfactants may be used on hard to wet plants such as roses. OHP 6672 50 W and 4.5 L should be used as part of a resistance management strategy involving use of products from different chemical classes with products from different chemical classes with dissimilar modes of action. Always read the label.

Sextant™ — Fungicide
For broad spectrum prevention and control of certain diseases of ornamentals. Sextant may be applied to a wide range of ornamental flowering and foliage plants either as foliar spray, dip or drench.
Sextant contains 2 lbs. of iprodione per gallon.

Signal Word: Caution REI: 12 hours

Sextant is a contact, curative fungicide which inhibits germination of fungal spores and growth of fungal mycelium. Sextant will offer control to Aerial Web Blight, Alternaria leaf Blight, Alternaria Leaf Spot, Botrytis Blight, Fusarium Leaf Spot, Helminthosporium Leaf Spot, Ink Spot, Tulip Fire, Ray Blight, Daffodil Leaf Scorch, Blossom Blight, Botrytis Storage Rot and Cylindrocladium Blight and Wilt.

Rates

• Foliar spray at a rate of 1 to 2.5 quarts per 100 gallons of water to the point of run-off.
• Apply at 7 to 14 day intervals.
• Do not apply more than 2.5 qts of product per acre per application.
• Do not apply more than 4 applications per year.
• Do not exceed a total of 10 quarts of product per acre per year. Always read the label.

Strike® 50 WDG (Water Dispersible Granule) — Systemic Fungicide
For control of certain diseases on flowers, foliage plants, shrubs, and shade trees in commercial
nurseries, garden centers, and greenhouses

Rates: (Greenhouse — Summer) 2 oz. per 100 gallons of water (Greenhouse — Winter) 1 oz. per 100 gallons of water
Other rates: Refer to label
Signal Word: Caution REI: 12 hours

Strike 50 WDG fungicide is absorbed rapidly and works systemically from within the plant. Good coverage and wetting of the foliage are necessary. Rainfall or sprinkler irrigation - within 30 minutes after application does not decrease effectiveness. Plant material should be maintained in a vigorously growing state through good cultural practices.

• Strike 50 WDG should be applied in all cases when plants are fully established and actively growing. Applications should be applied at label recommended intervals to maintain disease control.
• Strike 50 WDG applications should be applied to the point of run off.
• Strike 50 WDG should not be combined with other sterol inhibitor class fungicides. (All sterol inhibitor fungicides can exhibit plant growth regulator [PGR] activity.)
• Strike 50 WDG can be applied with other fungicides and should be rotated in a disease management system to control resistance to fungicides. Always read the label.

Triact® 70 — Clarified Hydrophobic Extract of Neem Oil
Broad Spectrum Fungicide/Miticide

Rate: from 1/2% to 2% (Refer to label)
Signal Word: Caution REI: 4 hours

Broad spectrum disease control on ornamentals. Disease control includes prevention, and control of black spot on roses, powdery mildew, downy mildew, anthracnose, rust, leaf spot, botrytis, needle rust, scab and blights. Suggested rates for most greenhouse plants is at a ratio of 1:200 or 1/2% solution for prevention. Control rate is 1:100 or a 1% solution. Spray intervals are 7 to 14 days. Precautions should be taken not to spray on open blooms without prior experience. Apply to runoff at 25 to 40 psi with hand sprayer or 100 to 200 psi with power equipment. Before mixing, shake well. Mix in water with a temperature of greater than 45° F. Avoid temperatures exceeding 90° F. Greenhouse roses should only be sprayed in a rotation program, which includes Triact 70 every 4 weeks. Always read the label.

Triact is a registered trademark of Certis USA.