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Flynexx Granules

This treatment applies to the following species:
Company: MGK

Specimen Label

Active Ingredient

Cyromazine (N-Cyclopropyl-1,3,5-triazine-2,4,6-triamine; CAS #66215-27-8)







Flynexx Granules Caution

Directions For Use

It is a violation of Federal law to use this product in a manner inconsistent with its labeling.


Do not apply this product in such a manner as to directly or through spray drift expose workers or other persons.

For Housefly, Lesser Housefly, Stable Fly and Soldier Fly Control in Cattle Operations, Hog Operations, Poultry Operations Including Layer and Breeder Chickens, and Horse Barns Where Horses are not intended for Slaughter or Food.

Fly control in cattle, hog, poultry, and horse operations should include appropriate sanitary and management practices to reduce the number and size of fly breeding sites. A successful sanitary and management program may allow less than constant use of insecticides. This, in turn, should prolong the effective life of such control agents.


Certain conditions around cattle, hog, poultry, and horse operations encourage flies and should be brought under control or eliminated as an aid to fly control. These include:

● For chickens, removing broken eggs and dead birds.

● Cleaning up feed spills & manure spills, especially if wet.

● Reducing feed spills in the manure pits.

● Reducing moisture in manure in the pits.

● Repairing water leaks that cause wet manure.

● Cleaning out weed-choked water drainage ditches.

● Minimizing sources from other fly-infested animal operations in close proximity to poultry houses or livestock pens.


FLYNEXX Granules is a larvicide with specific and unique properties developed for the control of fly larvae in manure and other breeding sites. It can be used simultaneously or alternatively with fly adulticides and is thus an important component of any integrated fly control program.

FLYNEXX Granules acts as a growth regulator and affects the molting process of fly larvae. It does not kill adult flies. The elimination of adult fly population occurs gradually and becomes visible one to two weeks after application. To achieve a faster reduction of the adult fly population, the concurrent use of an adulticide is recommended.

FLYNEXX Granules is a water-soluble granule suitable for dry scattering or spraying. The application rate is 0.02 lb. cyromazine per 200 sq. ft., independent of the method of application. Apply FLYNEXX Granules only on fly breeding sites. It is not intended for application to fly resting sites (walls, ceilings, etc.), as it has no effect on adult flies.


Application Method

FLYNEXX Granules Rate per 200 Sq. Ft.

Dry scattering

1 lb.


1 lb. per gallon of water

Dry scattering:

Apply FLYNEXX Granules directly and evenly on the fly breeding sites. Use dry scattering only in case of wet or liquid manure. Wear gloves when scattering.


Thoroughly mix the indicated quantity of FLYNEXX Granules with the corresponding volume of water. Apply as a coarse low-pressure spray on fly breeding sites with hand-pressurized or power-operated sprayers, or other suitable spray equipment.


The recommended treatment interval depends on management and housing systems as well as on climatic conditions. It can vary from 21 days up to several months. More specific recommendations are given in the application schedules below. Do not apply FLYNEXX Granules more frequently than once every 21 days.



Deep Litter. Treat edges and spillage areas around feed troughs and water troughs and where manure accumulates. In calf hutches placed outside, treat the whole floor surface. Apply FLYNEXX Granules by spraying approximately 3 days after manure removal and repeat treatment after each removal or when fly larvae are found.

Slatted Floors. Treat areas where manure and other refuse accumulates to create a fly breeding site where fly larvae are present.


All-In, All-Out System. Apply FLYNEXX Granules preferably by scattering immediately after cleaning and prior to the installation of the pigs on any fly breeding sites where fly larvae

are present.

Slatted Floors. Treat areas where manure or other refuse accumulates to create a fly breeding site where fly larvae are present.

Deep Litter. Apply FLYNEXX Granules by spraying approximately 3 days after manure removal and repeat treatment after each removal or when fly larvae are found. Treat entire manure surface and wet spots around feed troughs and water troughs.


Apply FLYNEXX Granules by spraying the entire manure area approximately 1 week after manure removal. Repeat treatment after each removal or when fly larvae are found.

HORSE BARNS (for horses not intended for slaughter or food):

Stalls, manure piles. Treat all areas where manure, spilled feed, and/or moisture accumulate. Scatter or spray treatment sites. Scatter FLYNEXX Granules underneath bedding on stall floors after cleaning. Repeat treatment after each removal or when fly larvae are found.


1. Do not administer via feed or drinking water, or contaminate feed or water troughs.

2. Do not apply FLYNEXX Granules directly to livestock or livestock feed as illegal residues may result.

3. Do not feed manure treated with FLYNEXX Granules to animals.

4. Allow 1 day (24 hours) between last application and slaughter to avoid illegal residues.

5. Do not use FLYNEXX Granules in conjunction with any cyromazine feed-through product in chickens. If chickens have been fed cyromazine-treated feed, do not apply FLYNEXX Granules to manure.

6. Manure treated with FLYNEXX Granules may be used as a soil fertilizer supplement. Do not apply more than 4 tons of manure treated with FLYNEXX Granules per acre per year. Do not apply treated manure to small grain crops that will be harvested or grazed, or illegal residues may result.



Flynexx Granules Caution

Causes moderate eye irritation. Avoid contact with eyes, skin or clothing. Wear protective eye wear. Wear long-sleeved shirt and long pants, socks, shoes and gloves. Remove and wash contaminated clothing before reuse. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet.


Do not contaminate water when disposing of equipment washwater or rinsate. For guidance, contact your State Water Board or Regional Office of the EPA.


“Cyromazine acts as a growth regulator, affecting the molting process of target pests, and therefore, may have an effect on bee larvae, but not on adult bees. Exposure to adult bees,

either through overspray or contact with residues, may lead to effects to bee larvae.”

Bees and other insect pollinators will forage on plants when they flower, shed pollen, or produce nectar.

Bees and other insect pollinators can be exposed to this pesticide from:

● Direct contact during foliar applications, or contact with residues on plant surfaces after foliar applications.

● Ingestion of residues in nectar and pollen when the pesticide is applied as a seed treatment, soil, tree injection, as well as foliar applications.

When using this product, applicators should take steps to:

● Minimize exposure of this product to bees and other insect pollinators when they are foraging on pollinator attractive plants around the application site.

● Minimize drift of this product on to beehives or to off-site pollinator attractive habitat. Drift of this product onto beehives or off-site to pollinator attractive habitat can result in bee kills.

Information on protecting bees and other insect pollinators may be found at the Pesticide Environmental Stewardship website at:

Pesticide incidents (for example, bee kills) should immediately be reported to the state/tribal lead agency. For contact information for your state, go to:

Pesticide incidents should also be reported to the National Pesticide Information Center at: or directly to EPA at:



● Hold eye open and rinse slowly and gently with water for 15-20 minutes.

● Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eye.

● Call a poison control center or doctor for treatment advice.


● Take off contaminated clothing.

● Rinse skin immediately with plenty of water for 15-20 minutes.

● Call a poison control center or doctor for treatment advice.


● Call a poison control center or doctor immediately for treatment advice.

● Have person sip a glass of water if able to swallow.

● Do not induce vomiting unless told to do so by the poison control center or doctor.

● Do not give anything by mouth to an unconscious person.


● Move person to fresh air.

● If person is not breathing, call 911 or an ambulance, and then give artificial respiration, preferably mouth-to-mouth, if possible.

● Call a poison control center or doctor for treatment advice.


Have the product container or label with you when calling a poison control center or doctor, or going for treatment. For information on this product (including health concerns, medical emergencies or pesticide incidents), you may call 1-888-740-8712.


Do not contaminate water, food, or feed by storage or disposal.


Always store pesticides in the original container. Store in a cool, dry place, not under wet conditions. Avoid direct sunlight and temperatures exceeding 95°F (35°C). Keep container closed when not in use.


Wastes resulting from the use of this product may be disposed of at an approved waste disposal facility.


Non-refillable container. Do not reuse or refill this container. Completely empty bag into application equipment. Then offer for recycling if available or dispose of empty bag in a sanitary landfill or by incineration. Alternatively, if allowed by state and local authorities, dispose of empty bag by burning. If burned stay out of smoke.


IMPORTANT: Read the entire Label including this Disclaimer, Risks of Using this Product, Limited Warranty, and Limitation of Liability before using this product. If the terms are not acceptable THEN DO NOT USE THE PRODUCT.

RISKS OF USING THIS PRODUCT The Buyer and User (referred to collectively herein as “Buyer”) of this product should be aware that there are inherent unintended risks associated with the use of this product which are impossible to eliminate. These risks include, but are not limited to lack of control of the target pests, resistance of the target pest to this product, injury caused by drift. Such risks of non-performance, resistance or other unintended consequences are unavoidable and may result because of such factors as presence of other materials either applied in the tank mix with this product or prior to application of this product, cultural practices or the manner of use or application, (or a combination of such factors) all of which are factors beyond the control of MGK. The Buyer should be aware that these inherent unintended risks may impact the effectiveness of this product. If the Buyer chooses not to accept these risks, THEN THIS PRODUCT SHOULD NOT BE APPLIED. By applying this product Buyer acknowledges and accepts these inherent unintended risks AND TO THE FULLEST EXTENT ALLOWED BY LAW, AGREES THAT ALL SUCH RISKS ASSOCIATED WITH THE APPLICATION AND USE ARE ASSUMED BY THE BUYER. MGK shall not be responsible for losses or damages (including, but not limited to incidental, consequential or special damages that may be claimed) resulting from use of this product in any manner not set forth on the label. Buyer assumes all risks associated with the use of this product in any manner or under conditions not specifically directed or approved on the label.

LIMITED WARRANTY warrants only that this product conforms to the chemical description on the label and is reasonably fit for the purposes stated in the label, under average use conditions, when used strictly in accordance with the label and subject to the Risks of Using This Product as described above. To the extent consistent with applicable law AND AS SET FORTH ABOVE, MGK MAKES NO OTHER WARRANTIES, EITHER EXPRESSED OR IMPLIED. No agent or representative of MGK or Seller is authorized to make or create any other express or implied warranty.

LIMITATION OF LIABILITY To the fullest extent allowed by law, MGK or Seller is not liable for any incidental, consequential, indirect or special damages resulting from the use or handling of this product. The limitation includes, but is not limited to increased finance charges or altered finance ratings, emotional or mental distress and/or exemplary damages. TO THE FULLEST EXTENT ALLOWED BY LAW, THE EXCLUSIVE REMEDY OF THE BUYER, AND THE EXCLUSIVE MAXIMUM LIABILITY OF MGK OR SELLER FOR ANY AND ALL CLAIMS, LOSSES, INJURIES OR DAMAGES (INCLUDING CLAIMS BASED ON BREACH OF WARRANTY, CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) RESULTING FROM THE USE OR HANDLING OF THIS PRODUCT SHALL BE THE RETURN OF THE PURCHASE PRICE OF THIS PRODUCT OR, AT THE ELECTION OF MGK OR SELLER, THE REPLACEMENT OF THE PRODUCT.

PROMPT NOTICE OF CLAIM To the extent consistent with applicable law allowing such requirements MGK must be provided Product Name/Label Number/Page # notice as soon as Buyer has reason to believe it may have a claim, but in no event later than twenty-one days from date of application, so that an immediate inspection of the affected property can be made. To the extent consistent with applicable law if Buyer does not notify MGK of any claims, in such period, it shall be barred from obtaining any remedy.

NO AMENDMENTS MGK and Seller offer this product, and Buyer accepts it, subject to the foregoing Disclaimer, Risks of Using This Product, Limited Warranty and Limitation of Liability, which may not be modified by any oral or written agreement.

EPA Reg. No. 1021-2844

EPA Est. No. 1021-MN-2

Manufactured for MGK®.

©2020 MGK. All rights reserved.

MGK® and Flynexx® are registered trademarks of McLaughlin Gormley King Company.

7325 Aspen Lane North, Minneapolis, MN 55428

Rev. 1019-1020

Presentation: 35 lb bag.

CPN: 2040023.1

Toll-Free:   1-800-645-6466
THIS SERVICE AND DATA ARE PROVIDED "AS IS". DVMetrics assumes no liability, and each user assumes full risk, responsibility, and liability, related to its use of the DVMetrics service and data. See the Terms of Use for further details.


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