TURF: GRAY LEAF SPOT

General Information

PRODUCT INFORMATION

DISARM M FUNGICIDE is a systemic, protective and curative broad-spectrum fungicide for the control of certain diseases in turf and ornamentals. DISARM M FUNGICIDE works by interfering with respiration and sterol synthesis in plant-pathogenic fungi, and is a potent inhibitor of spore germination and mycelial growth. The active ingredients, fluoxastrobin and myclobutanil, move rapidly into green tissue via translaminar movement and are rainfast in as little as fifteen minutes after application. Roots of plants also take up the active ingredients which are translocated throughout the xylem of plants to provide internal inhibition of fungal growth and protection from new infections. The broad spectrum of activity of DISARM M FUNGICIDE makes it an excellent choice as a broad spectrum, dual action fungicide for turf and ornamental disease management programs. Other labeled fungicides can be used in tank-mixture or alternated with

DISARM M FUNGICIDE to cover all the major fungal diseases that attack most, if not all, major turfgrass species.

UNDER CERTAIN CONDITIONS CONDUCIVE TO EXTENDED INFECTION PERIODS, ADDITIONAL FUNGICIDE APPLICATIONS BEYOND THE NUMBER ALLOWED BY THIS LABEL MAY BE NEEDED. UNDER THESE CONDITIONS, USE ANOTHER FUNGICIDE REGISTERED FOR THE DISEASE.

RESISTANCE MANAGEMENT
The active ingredients in DISARM M FUNGICIDE belong to the strobilurin (Group 11 Fungicides) and the dimethylase inhibitor (Group 3 Fungicides) classes of chemistry.The dual action of DISARM M FUNGICIDE results in a built in resistance management strategy that will minimize the resistance in at risk pathogens.

Fungal pathogens are known to develop resistance to products with the same mode of action when used repeatedly. Because resistance development cannot be predicted, the use of this product should conform to resistance management strategies established for turf and ornamentals. Such strategies may include rotating and/or tank-mixing with products having different modes of action, or limiting the total number of applications per season. Arysta LifeScience encourages responsible resistance management to ensure effective long-term control of the fungal diseases on this label.

In programs in which DISARM M FUNGICIDE is used, the number of Group 11 fungicides (strobilurins) and Group 3 fungicides (dimethylase inhibitors) applications should be no more than one half of the total number of fungicide applications per season for at risk pathogens.

Turf pathogens that cause Dollar Spot, Gray Leaf Spot, Anthracnose, and Pythium Blight are known to have the capacity to develop resistant populations with the repeated use of a single fungicide or a single class of fungicide chemistry. Certain fungal pathogens of ornamentals also have the capacity to become resistant to single site inhibitor fungicides. The pathogens that incite Downy Mildew, Powdery Mildew and Rust diseases of ornamentals are known to have the capacity to develop resistance to single site inhibitors.

APPLICATION GUIDELINES

BROADCAST GROUND SPRAYERS
Thorough coverage is necessary to provide good disease control. Applications using sufficient water volume to provide thorough and uniform coverage provide the most effective disease control. For application to turf, 43–174 gallons per acre (1–4 gallons per 1,000 sq ft) is recommended.For foliar application to ornamentals, use enough water volume to thoroughly cover the foliage of the plants.

Equip sprayers with nozzles that provide accurate and uniform application. Be certain that nozzles are the same size and uniformly spaced across the boom. Calibrate the sprayer before use. Use a pump with the capacity to: (1) maintain a minimum of 35 psi at nozzles, and (2) provide sufficient agitation in the tank to keep the mixture in suspension (this requires recirculation of 10% of the tank volume per minute).Use jet agitators or a liquid sparge tube for vigorous agitation. Use screens to protect the pump and to prevent nozzles from clogging. Screens placed on the suction side of the pump should be 16-mesh or coarser. Do not place a screen in the recirculation line. Use 50-mesh screens at the nozzles. Check nozzle manufacturer’s recommendations. For information on spray equipment and calibration, consult sprayer manufacturer’s and/or state recommendations. For specific local directions and spray schedules, consult the current state agricultural experiment station recommendations.

PLANT SAFETY: The active ingredients in DISARM M FUNGICIDE have been shown to be safe to many ornamental plants. However, due to the large number of genera, species and varieties of ornamental plants, it is impossible to test every variety or cultivar for tolerance to DISARM M FUNGICIDE. Neither the manufacturer nor the seller has determined whether or not DISARM M FUNGICIDE can be used safely on all genera, species, or varieties of ornamental plants. The professional user should conduct small scale testing to insure plant safety prior to broad scale commercial use.

The effects of spraying DISARM M FUNGICIDE in combination with plant growth regulators is not known. If plant growth regulator applications are being planned for ornamentals that will be sprayed with DISARM M FUNGICIDE, the user should test for enhanced growth regulator activity on a small number of plants under growing conditions similar those planned for large scale use.

DO NOT APPLY TO LEATHERLEAF FERNS OR TO OTHER FERNS GROWN UNDER SHADE.

SPRAY DRIFT

SENSITIVE AREAS: This pesticide must only be applied when the potential for drift to adjacent sensitive areas (e.g., residential areas, bodies of water, and known habitats for threatened or endangered species, non-target crops) is minimal (e.g., when wind is blowing away from the sensitive areas).

Avoiding spray drift at the application site is the responsibility of the applicator. The interaction of many equipment and weather-related factors determine the potential for spray drift. The applicator and the grower are responsible for considering all these factors when making decisions.

DIRECTIONS FOR USE THROUGH SPRINKLER

IRRIGATION SYSTEMS
Apply this product only through overhead sprinkler irrigation systems including center pivot, microjet, wheel lines, lateral move, side roll, or overhead solid set irrigation systems. Do not apply this product through any other type of irrigation system. Reduced effectiveness can result from non-uniform distribution of treated irrigation water.

If you have questions about calibration, you should contact State Extension Service Specialists, equipment manufacturers or other irrigation experts.

SPRAY PREPARATION: Remove scale, pesticide residues, and other foreign matter from the chemical tank and entire injector system. Flush with clean water.

APPLICATION INSTRUCTIONS: First prepare a suspension of DISARM M FUNGICIDE in a mix tank. Fill tank with 1⁄2 to 3⁄4 the desired amount of water. Start mechanical or hydraulic agitation. Add the required amount of DISARM M FUNGICIDE and then the remaining volume of water. Then set sprinkler to deliver no more than 0.4 inch of water per acre. Start sprinkler and uniformly inject the suspension of DISARM M FUNGICIDE into the irrigation water line to deliver the desired rate per acre. The suspension of DISARM M FUNGICIDE should be injected with a positive displacement pump into the main line ahead of a right angle turn to ensure adequate mixing. If you should have any other questions about calibra¬tion, you should contact State Extension Service specialists, equipment manufacturers or other experts.

NOTE: When treatment with DISARM M FUNGICIDE has been completed, further field irrigation over the treated area should be avoided for 24 hours to prevent washing the chemical off the turf and/or treated plants.

CHEMIGATION SYSTEMS CONNECTED TO PUBLIC WATER SYSTEMS

1. Do not connect an irrigation system (including greenhouse systems) used for pesticide application to a public water system unless the pesticide label prescribed safety devices for public water systems are in place. Public water system means a system for the provision to the public of piped water for human consumption if such system has at least 15 service connections or regularly serves an average of at least 25 individuals daily at least 60 days out of the year.
2. Chemigation systems connected to public water systems must contain a functional, reduced-pressure zone, back flow preventer (RPZ) or the functional equivalent in the water supply line upstream from the point of pesticide introduction. As an option to the RPZ, the water from the public water system should be discharged into a reservoir tank prior to pesticide introduction. There shall be a complete physical break (air gap) between the flow outlet end of the fill pipe and the top or overflow rim of the reservoir tank of at least twice the inside diameter of the fill pipe.
3. The pesticide injection pipeline must contain a functional, automatic, quick-closing check valve to prevent the flow of fluid back toward the injection pump.
4. The pesticide injection pipeline must contain a functional, normally closed, solenoid-operated valve located on the intake side of the injection pump and connected to the system interlock to prevent fluid from being withdrawn from the supply tank when the irrigation system is either automatically or manually shut down.
5. The system must contain functional interlocking controls to automatically shut off the pesticide injection pump when the water pump motor stops or in cases where there is no water pump, when the water pres¬sure decreases to the point where pesticide distribution is adversely affected.
6. Systems must use a metering pump, such as a positive displacement injection pump (e.g., diaphragm pump) effectively designed and constructed of materials that are compatible with pesticides and capable of being fitted with a system interlock.
7. Do not apply when wind favors drift.

IRRIGATION SYSTEMS
1. Maintain continuous agitation in mix tank during mixing and application to assure a uniform suspension.
2. Greater accuracy in calibration and distribution will be achieved by injecting a larger volume of a more dilute solution per unit time.
3. The system must contain a functional check valve, vacuum relief valve, and low pressure drain appropriately located on the irrigation pipeline to prevent water source contamination from backflow.
4. The pesticide injection pipeline must contain a functional, automatic, quick-dosing check valve to prevent the flow of fluid back toward the injection pump.
5. The pesticide injection pipeline must also contain a functional, normally closed solenoid-operated valve located on the intake side of the injection pump and connected to the system interlock to prevent fluid from being withdrawn from the supply tank when the irrigation system is either automatically or manually shutdown.
6. The system must contain functional interlocking controls to automatically shut off the pesticide injection pump when the water pump motor stops.
7. The irrigation line or water pump must include a functional pressure switch which will stop the water pump motor when the water pressure decreases to the point where pesticide distribution is adversely affected.
8. Systems must use a metering pump, such as a positive displacement injection pump (e.g., diaphragm pump) effectively designed and constructed of materials that are compatible with pesticides and capable of being fitted with a system interlock.
9. Do not apply when wind speed favor drift. To determine wind conditions, contact your local extension agent.
10. Do not apply when system connections or fittings leak, when nozzles do not provide uniform distribution or when lines containing the product must be dismantled and drained. Reduced effectiveness may result from non-uniform distribution of treated water.
11. Allow sufficient time for pesticide to be flushed through all lines and all nozzles before turning off irrigation water. A person knowledgeable of the chemigation system and responsible for its operation, or under supervision of the responsible person, shall shut the system down and make necessary adjustments should the need arise.
12. Do not connect an irrigation system used for pesticide application to a public water system unless the pesticide label-prescribed safety devices for public water systems are in place.

Limitations, Restrictions, and Exceptions

USE DIRECTIONS FOR TURF

DISARM M FUNGICIDE provides control of many important diseases in turf. DISARM M FUNGICIDE should be used in conjunction with cultural practices that promote healthy, vigorous turf. These practices include nutrient management, thatch management, water management and judicious use of other fungicides and cultural practices. DISARM M FUNGICIDE can be used for disease control in turf on sod farms, golf courses, lawns and landscape areas around residential, institutional, public, commercial and industrial buildings, parks, recreational areas and athletic fields.

For use in the establishment of turfgrass from seed or in overseeding of dormant turfgrass: DISARM M FUNGICIDE may be used for control of certain turfgrass diseases associated with turfgrass establishment from seed or sod. DISARM M FUNGICIDE may also be used during overseeding of dormant turfgrass.

DISARM M FUNGICIDE may be safely applied before or after seeding or at seedling germination and emergence to ryegrass, bentgrass, bluegrass, and fescue turfgrass types. Optimum application timing is during seeding. See Application Guidelines section.

Rate Ranges: Use the shorter specified application interval and/or the higher specified rate when prolonged favorable disease conditions exist.

GRAY LEAF SPOT

Retreatment Interval (days): 14-28

Application Instructions
- Begin applications before disease is present and continue applications while conditions are favorable for disease development.

Specific Use Restrictions
- Do not apply more than 11.7 pt (2.18 lb ai fluoxastrobin and 3.53 lb myclobutanil) of DISARM M FUNGICIDE per acre per year, or more than 1.0 fl oz/1,000 sq ft per application.
- Not for home owner use. May only be applied to residential turf by a certified pest control operator.
- For soil-borne diseases, use sufficient water to move the active ingredient into the crown and upper root zone.

Restricted Entry Interval

24 hours