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Flint Extra Fungicide

Flint® Extra is a broad-spectrum systemic fungicide with long-lasting control and preventative protection against important diseases in grapes, pome fruit and stone fruits. It works by inhibiting spore germination and mycelial growth, and provides extended preventive protection by protecting the leaf surface, penetrating plant tissue and redistributing through vapor action.

A recent sampling program of scab-infected apple leaves from orchards across Ontario has revealed the presence of QoI-resistant apple scab. Bayer is advising apple growers in Ontario not to use Flint Extra for control of apple scab. Apple growers outside of Ontario should tank mix Flint Extra with a compatible registered contact fungicide (EBDC) to provide two modes of action to control apple scab.

Product Summary

Product Type

Fungicide

Crops

Grapes*
Apples
Peaches

Diseases Controlled

Powdery mildew
Sooty blotch
Fly speck

Diseases Suppressed

Powdery mildew (stone fruits only)

Groups & Active Ingredients

Trifloxystrobin Group 11

Formulation Type

Suspension concentrate

Packaging

1 L jug

Product Highlights

BENEFITS

  • Proven Efficacy: Provides proven broad-spectrum control of key diseases in a variety of crops
  • Excellent Compatibility: Good crop safety history and mix compatibility with other products, making it an excellent fit for many Integrated Pest Management (IPM) programs
  • Easy to Use: Low use rates in an easy-to-use liquid SC formulation

The active ingredient in Flint Extra rapidly penetrates the waxy layer of the plant tissues and redistributes on the plant surface, providing locked-in protection against disease, even within hard-to-penetrate plant canopies.

The fungicide stops both early and developing fungal diseases by preventing initial infection as well as secondary spread of diseases. This makes Flint Extra a valuable tool in your disease management program.

Crops

  • Apples
  • Carrots
  • Cherries
  • Grapes*
  • Peaches
  • Pears

*Do not apply to Concord grapes

Effective Against

Diseases Controlled

  • Powdery mildew
  • Sooty blotch
  • Fly speck
  • Alternaria spp.
  • Black rot
  • Cedar apple rust

Diseases Suppressed

  • Cercospora early blight of celeriac
  • Cercospora leaf spot of carrot
  • Leaf blight
  • Powdery mildew (stone fruits)
  • Septoria late blight of celeriac
  • Shothole

How to Apply

Overview:

  • New liquid formulation for convenience and ease of handling
  • Broad-spectrum, translaminar activity
  • A potent inhibitor of spore germination and mycelial growth .
  • Long-lasting preventative activity of many fungal diseases through protection at the leaf surface, penetration of the plant tissue and unique re-distribution characteristics
  • Low use rates
  • Gentle on a wide range of beneficial organisms
  • Rainfast within two hours of application
  • Good fit for IPM
  • Excellent crop tolerance

Application Rates and Guidelines

Crop Disease controlled Application rate Application timing
Cherries Powdery mildew 180 - 215 mL/ha (73 - 87 mL/ac.) Begin applications preventatively at petal fall and repeat at 7 - 14 day intervals.
Leaf spot 180 - 215 mL/ha (73 - 87 mL/ac.) Begin applications preventatively at petal fall and repeat at 7 - 14 day intervals.
Grapes* Powdery mildew 110 - 145 mL/ha (45 - 58 mL/ac.) Begin applications preventatively, continue as needed on 14 - 21 day intervals.
Black rot 110 - 145 mL/ha (45 - 58 mL/ac.) Begin applications when shoots are 3 to 9 cm (1 to 3 inches) in length, continue as needed on 7 - 14 day intervals.
Pome Fruit Group Scab** 145 - 180 mL/ha (58 - 73 mL/ac.) Begin application at green tip, continue as needed on 7 - 10 day intervals.
Sooty blotch
Fly speck
145 - 180 mL/ha (58 - 73 mL/ac.) Begin applications preventatively, continue as needed on 10 - 14 day intervals.
Powdery mildew
Cedar apple rust
145 - 215 mL/ha (58 - 87 mL/ac.) Begin applications preventatively, continue as needed on 10 - 14 day intervals.
Root vegetables Leaf blight*** (Alternaria spp.) 145 - 215 mL/ha (58 - 87 mL/ac.) Begin applications preventatively and continue as needed on a 14 day interval.
Strawberries Powdery mildew 145 mL/ha (58 mL/ac.) Begin applications preventatively and continue on a 7 - 14 day interval.
Stone fruits Powdery mildew*** 145 - 290 mL/ha (58 - 117 mL/ac.) Apply at petal fall and continue on an 8 - 14 day interval.
Shothole 215 - 290 mL/ha (87 - 117 mL/ac.) Begin applications preventatively and continue on an 8 - 14 day interval.

 * Do not apply to Concord grapes
** Flint Extra is not recommended for control of apple scab in Ontario. Outside Ontario, tank mix Flint Extra with a compatible registered contact fungicide (EBDC).
***Suppression only

Pre-Harvest Intervals and Maximum Number of Applications

Crop Pre-harvest interval (days) Maximum number of applications at any rate
Asparagus 180 3
Celery and root vegetables (except radish) 7 4
Cherries 1 5
Grapes (except Concord) 14 4
Leafy petiole vegetables 7 4
Peanut 14 6
Pome fruit 14 4
Radish 7 2
Strawberries Up to day of harvest 3
Stone fruits (except cherries) 1 4
Sugar beet 21 3
Tree nuts 60 4

Application Tips

Thorough coverage is necessary to provide good disease control. Applications using sufficient water volume to provide thorough and uniform coverage generally provide the most effective disease control. For ground application equipment, a minimum of 500 L/ha is recommended for tree crops and grapes, and 100 L/ha for other crops.

Ground application only (field sprayer or airblast). Do not apply by air.

Rainfastness

2 hours

Tank Mixing

Prepare no more spray mixture than is needed for the immediate operation. Thoroughly clean spray equipment before using this product. Vigorous agitation is necessary for proper dispersal of the product. Maintain maximum agitation throughout the spraying operation. Do not let the spray mixture stand overnight in the spray tank. Flush the spray equipment thoroughly following each use and apply the rinsate to a previously treated area.

Add 1/2 of the required amount of water to the mix tank. With the agitator running, add the Flint Extra to the tank. Continue agitation while adding the remainder of the water. Begin application of the solution after the Flint Extra has completely and uniformly dispersed into the mix water. Maintain agitation until all of the mixture has been applied.

Resistance Management

For resistance management, please note that Flint Extra contains a Group 11 fungicide. Any fungal population may contain individuals naturally resistant to Flint Extra and other Group 11 fungicides.

To delay fungicide resistance:

  • Where possible, rotate the use of Flint Extra or other Group 11 fungicides with different groups that control the same pathogens
  • Avoid application of consecutive sprays of Flint Extra or other fungicides in the same group in a season. Refer to use directions for the maximum number of sequential applications of Flint Extra or other Group 11 fungicides allowed before alternating to a non-strobilurin fungicide.
  • Do not exceed the total number of applications of Flint Extra per season as indicated
  • Fungicide use should be based on an IPM program that includes scouting, historical information related to pesticide use and cover crop and considers cultural, biological and other chemical control practices
  • If disease continues to progress after treatment with this product, do not increase the use rate. Discontinue use of this product, and switch to another fungicide with a different target site of action, if available.
  • Contact your local extension specialist or certified turf or crop advisors for any additional pesticide resistance management or IPM recommendations for specific pathogens
  • For further information or to report suspected resistance, contact a Bayer CropScience representative at 1-888-283-6847 or at www.bayercropscience.ca

Provinces of Registration

  • Alberta
  • British Columbia
  • Manitoba
  • New Brunswick
  • Newfoundland
  • Northwest Territories
  • Nova Scotia
  • Nunavut
  • Ontario
  • Prince Edward Island
  • Quebec
  • Saskatchewan
  • Yukon
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