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@@ -4,160 +4,94 @@
- Registrant: SYNGENTA CROP PROTECTION, LLC
- Signal word: Caution
- Active ingredients: Picarbutrazox (1.81%); Fludioxonil (1.81%); Metalaxyl-M (7.24%); Sedaxane (1.81%)
- Label accepted: 2023-03-07
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-01731-20230307.pdf
- Label accepted: 2026-08-12
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-01731-20260812.pdf
---
Registration Notice Conditional v.20220527
U.S. ENVIRONMENTAL PROTECTION AGENCY
Office of Pesticide Programs
Registration Division (7505T)
1200 Pennsylvania Ave., N.W.
Washington, D.C. 20460
EPA Reg. Number:
100-1731
Date of Issuance:
3/7/23
NOTICE OF PESTICIDE:
X Registration
Reregistration
Term of Issuance:
Conditional
(under FIFRA, as amended)
Name of Pesticide Product:
A23545 ST
Name and Address of Registrant (include ZIP Code):
Syngenta Crop Protection, LLC
P.O. Box 18300
Greensboro, NC 27419
Note: Changes in labeling differing in substance from that accepted in connection with this registration must be submitted to and a ccepted by the
Registration Division prior to use of the label in commerce. In any correspondence on this product always refer to the above EPA registration number.
On the basis of information furnished by the registrant, the above named pesticide is hereby registered
under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA).
Registration is in no way to be construed as an endorsement or recommendation of this product by the
Agency. In order to protect health and the environment, the Administrator, on his motion, may at any
time suspend or cancel the registration of a pesticide in accordance with the Act. The acceptance of any
name in connection with the registration of a product under this Act is not to be construed as giving the
registrant a right to exclusive use of the name or to its use if it has been covered by others.
This product is conditionally registered in accordance with FIFRA section 3(c)(7)(A). You must comply
with the following conditions:
1. Submit and/or cite all data required for registration/reregistration/registration review of your
product under FIFRA when the Agency requires all registrants of similar products to submit such
data.
Continues page 2
Signature of Approving Official:
Shaja B. Joyner, Product Manager 20
Fungicide-Herbicide Branch
Registration Division 7505T
Date:
3/7/23
EPA Form 8570-6
August 12, 2026
Patsy Laird
Regulatory Manager, Seedcare
Syngenta Crop Protection, LLC
P.O. Box 18300
Greensboro, NC 27419
Subject: Label Amendment - Registration Review Mitigation for Sedaxane
Product Name: A23545 ST
EPA Registration Number: 100-1731
Application Date: February 13, 2026
Case Number: 684655
Dear Mrs. Patsy Laird:
The Agency, in accordance with the Federal Insecticide, Fungicide, and Rodenticide Act
(FIFRA), as amended, has completed reviewing all the information submitted with your
application to support the Registration Review of the above referenced product in
connection with the Sedaxane Interim Decision, and has concluded that your submission
is acceptable. The label referred to above, submitted in connection with registration under
FIFRA, as amended, is acceptable.
Should you wish to add/retain a reference to the company’s website on your label, then
please be aware that the website becomes labeling under the Federal Insecticide,
Fungicide, and Rodenticide Act and is subject to review by the Agency. If the website is
false or misleading, the product would be misbranded and unlawful to sell or distribute
under FIFRA section 12(a)(1)(E). 40 CFR 156.10(a)(5) list examples of statements EPA may
consider false or misleading. In addition, regardless of whether a website is referenced on
your product’s label, claims made on the website may not substantially differ from those
claims approved through the registration process. Therefore, should the Agency find or if it
is brought to our attention that a website contains false or misleading statements or
claims substantially differing from the EPA approved registration, the website will be
referred to the EPA’s Office of Enforcement and Compliance Assurance.
Page 2 of 2
EPA Reg. No. 100-1731
Decision No. 583727
2. The data requirements for storage stability and corrosion characteristics (Guidelines 830.6317
and 830.6320) are not satisfied. You have 18 months from the date of registration to provide
these data.
3. Make the following label changes before you release the product for shipment:
• Revise the EPA Registration Number to read, “EPA Reg. No. 100-1731.”
4. Submit one copy of the final printed label for the record before you release the product for
shipment.
Should you wish to add/retain a reference to the company’s website on your label, then please be aware
that the website becomes labeling under FIFRA and is subject to review by the Agency. If the website is
false or misleading, the product would be misbranded and unlawful to sell or distribute under FIFRA
section 12(a)(1)(E). 40 CFR 156.10(a)(5) lists examples of statements EPA may consider false or
misleading. In addition, regardless of whether a website is referenced on your product’s label, claims
made on the website may not substantially differ from those claims approved through the registration
process. Therefore, should the Agency find or if it is brought to our attention that a website contains
false or misleading statements or claims substantially differing from the EPA approved registration, the
website will be referred to the EPA’s Office of Enforcement and Compliance.
If you fail to satisfy these data requirements, EPA will consider appropriate regulatory action including,
among other things, cancellation under FIFRA section 6(e). Your release for shipment of the product
constitutes acceptance of these conditions. A stamped copy of the label is enclosed for your records.
The record for this product currently contains the following CSF(s):
• Basic CSF dated 02/18/2022
• Alternate CSF 1 dated 02/18/2022
• Alternate CSF 2 dated 02/18/2022
If you have any questions, please contact Lindsay DeMers via email at demers.lindsay@epa.gov.
Enclosure: stamped “accepted” label
Page 2 of 2
EPA Reg. No. 100-1731
Decision No. 684655
A stamped copy of your labeling is enclosed for your records. This labeling
supersedes all previously accepted labeling and must be used at your next label
printing. You must submit one copy of the final printed labeling before you release
the product for shipment with the new labeling. In accordance with 40 CFR
152.130(c), you may distribute or sell this product under the previously approved
labeling for 12 months from the date of this letter. After 12 months, you may only
distribute or sell this product if it bears this new revised labeling or subsequently
approved labeling. “To distribute or sell” is defined under FIFRA section 2(gg) and
its implementing regulation at 40 CFR 152.3.
If you have any questions about this letter, please contact Samantha Carter by phone at
202-566-1179, or via email at carter.samantha@epa.gov.
Sincerely,
Jaclyn Pyne, Team Leader
Risk Management and Implementation Branch 3
Pesticide Re-Evaluation Division
Office of Pesticide Programs
ENCLOSURE: Stamped label
[Master Label]
MEFENOXAM GROUP 4 FUNGICIDE
SEDAXANE GROUP 7 FUNGICIDE
FLUDIOXONIL GROUP 12 FUNGICIDE
PICARBUTRAZOX GROUP U17 FUNGICIDE
A
23545 ST
[
Alternate Brand Name: Vayantis® Quattro]
Fungi
cide
A
seed treatment product for protection against damage from listed seed-borne and seedling
diseases on soybean
A
ctive Ingredient:
Mefenoxam1 ..............................................................................................................7.24%
Fludioxonil2 ................................................................................................................1.81%
Picarbutrazox3 ...........................................................................................................1.81%
Sedaxane4 .................................................................................................................1.81%
Other Ingredients: 87.33%
Total: 100.00%
[Master Label]
MEFENOXAM GROUP 4 FUNGICIDE
SEDAXANE GROUP 7 FUNGICIDE
FLUDIOXONIL GROUP 12 FUNGICIDE
PICARBUTRAZOX GROUP U17 FUNGICIDE
A23545 ST
[Alternate Brand Name: Vayantis® Quattro]
Fungicide
A seed treatment product for protection against damage from listed seed-borne and seedling
diseases on soybean
Active Ingredient:
Mefenoxam
1 ..............................................................................................................7.24%
Fludioxonil2 ................................................................................................................1.81%
Picarbutrazox3 ...........................................................................................................1.81%
Sedaxane4 .................................................................................................................1.81%
Other Ingredients: 87.33%
Total: 100.00%
1CAS No. 70630-17-0 and 69516-34-3
2CAS No. 131341-86-1
3CAS No. 500207-04-5
3CAS No. 500207-04-5
4CAS No. 874967-67-6
A
23545 ST is a flowable concentrate for seed treatment containing 0.64 lb mefenoxam, 0.16
lb fludioxonil, 0.16 lb picarbutrazox, and 0.16 lb sedaxane per gallon.
KE
EP OUT OF REACH OF CHILDREN.
CAUTION
S
ee additional precautionary statements and directions for use in booklet.
EPA R
eg. No. 100-XXXX
A23545 ST is a flowable concentrate for seed treatment containing 0.64 lb mefenoxam, 0.16
lb fludioxonil, 0.16 lb picarbutrazox, and 0.16 lb sedaxane per gallon.
KEEP OUT OF REACH OF CHILDREN.
CAUTION
See additional precautionary statements and directions for use in booklet.
EPA Reg. No. 100-1731
EPA Est. No.
___
_______
Net Contents
[
Batch Code: _____ ] (For nonrefillables only.)
03/07/2023
__________
Net Contents
[Batch Code: _____ ] (For nonrefillables only.)
Aug 12, 2026
100-1731
A23545 ST
@@ -175,12 +109,16 @@ TABLE OF CONTENTS
2.6 Environmental Hazards
2.6.1 Groundwater Advisory
2.7 Physical or Chemical Hazards
DIRECTIONS FOR USE
3.0 PRODUCT INFORMATION
3.1 Resistance Management
4.0 APPLICATION DIRECTIONS
4.1 Tank Mixtures
5.0 RESTRICTIONS
6.0 SEED CONTAINER LABEL REQUIREMENTS
6.1 Use of On-Farm Treated Seed (when treated seed are not for sale or distribution)
6.2 Seed Treatment in Commercial Facilities or Seed Treatment on Farm (when treated seed
are to be sold or distributed) – Seed Bag Labeling Requirements
7.0 SEED TREATMENT DIRECTIONS
7.1 Soybean
8.0 STORAGE AND DISPOSAL
@@ -191,17 +129,17 @@ A23545 ST
1.0 FIRST AID
FIRST AID
If swallowed • Call a poison control center or doctor immediately for treatment
If swallowed x Call a poison control center or doctor immediately for treatment
advice.
• Have a person sip a glass of water if able to swallow.
• Do not induce vomiting unless told to do so by a poison control
x Have a person sip a glass of water if able to swallow.
x Do not induce vomiting unless told to do so by a poison control
center or doctor.
• Do not give anything by mouth to an unconscious person.
x Do not give anything by mouth to an unconscious person.
If on skin or
clothing
• 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.
x Take off contaminated clothing.
x Rinse skin immediately with plenty of water for 15-20 minutes.
x 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.
HOTLINE NUMBER
@@ -220,11 +158,11 @@ thoroughly with soap and water after handling and before eating, drinking, chewi
tobacco or using the toilet. Remove and wash contaminated clothing before reuse.
2.2 Personal Protective Equipment (PPE)
Applicators and other handlers must wear:
• Long-sleeved shirt and long pants
• Chemical-resistant gloves made of barrier laminate, butyl rubber ≥14 mils, neoprene
rubber ≥14 mils, nitrile rubber ≥14 mils, polyvinyl chloride (PVC) ≥14 mils, or Viton™
≥14 mils
• Shoes plus socks
x Long-sleeved shirt and long pants
x Chemical-resistant gloves made of EDUULHUODPLQDWHEXW\OUXEEHU•PLOVQHRSUHQH
UXEEHU•PLOVQLWULOHUXEEHU•PLOVSRO\YLQ\OFKORULGH 39& •PLOV, or Viton™
•PLOV
x Shoes plus socks
2.3 User Safety Requirements
Follow manufacturer’s instructions for cleaning/maintaining PPE. If no such instructions for
washables exist, use detergent and hot water. Keep and wash PPE separately from other
@@ -236,13 +174,13 @@ A23545 ST
2.4 Engineering Controls
When handlers use closed systems, enclosed cabs, or aircraft in a manner that meets the
requirements listed in the Worker Protection Standard (WPS) for agricultural pesticides (40
CFR 170.240(d)(4-6)), the handler PPE requirements may be reduced or modified as
CFR 170.607 (d) and (e)), the handler PPE requirements may be reduced or modified as
specified in the WPS.
2.5 User Safety Recommendations
Users should:
• Remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly
x Remove clothing/PPE immediately if pesticide gets inside. Then wash thoroughly
and put on clean clothing. Remove PPE immediately after handling this product.
• Wash the outside of gloves before removing. As soon as possible, wash thoroughly
x Wash the outside of gloves before removing. As soon as possible, wash thoroughly
and change into clean clothing.
2.6 Environmental Hazards
@@ -293,6 +231,7 @@ lowest yearly total on that crop.
A23545 ST
6
AGRICULTURAL USE REQUIREMENTS
Use this product only in accordance with its labeling and with the Worker Protection
Standard, 40 CFR part 170. This Standard contains requirements for the protection of
@@ -310,10 +249,10 @@ treated.
PPE required for early entry to treated areas that is permitted under the Worker Protection
Standard and that involves contact with anything that has been treated, such as plants, soil,
or water is:
• Coveralls
• Chemical-resistant gloves made of barrier laminate, butyl rubber ≥14 mils, nitrile rubber
≥14 mils, neoprene rubber ≥14 mils, polyvinyl chloride (PVC) ≥14 mils, or Viton ≥14 mils
• Shoes plus socks
x Coveralls
x Chemical-resistant gloves made of EDUULHUODPLQDWHEXW\OUXEEHU•PLOVQLWULOHUXEEHU
•PLOVQHRSUHQHUXEEHU•PLOV, SRO\YLQ\OFKORULGH 39& •PLOV or 9LWRQ•PLOV
x Shoes plus socks
3.0 PRODUCT INFORMATION
A23545 ST is a broad-spectrum seed treatment fungicide that consists of four fungicide
@@ -321,7 +260,8 @@ active ingredients: fludioxonil, mefenoxam, picarbutrazox, and sedaxane. Each ac
ingredient has a different mode of action against fungal pathogens. This fungicide seed
treatment is designed for protection against many important fungal plant diseases. A23545
ST may be applied in tank mixes or sequentially with other registered seed treatment
pesticide products such as Cruiser® 5FS (EPA Reg. No. 100-941, containing thiamethoxam)
pesticide products such as Cruiser
® 5FS (EPA Reg. No. 100-941, containing thiamethoxam)
or Fortenza® (EPA Reg. Nos. 100-1418 and 100-1420, containing cyantraniliprole)
insecticides or Saltro® (EPA Reg. No. 100-1648, containing pydiflumetofen)
fungicide/nematicide.
@@ -332,21 +272,17 @@ protection from seed-borne Diaporthe-Phomopsis disease complex sometimes referre
pod and stem blight (Phomopsis and Diaporthe spp.). Fludioxonil suppresses seed-borne
Sclerotinia and Phomopsis spp.
Mefenoxam is active against Pythium and Phytophthora spp.
Picarbutrazox provides early-season protection against Pythium and Phytophthora spp. that
cause seed rot and damping-off.
Mefenoxam is active against Pythium and Phytophthora spp.
A23545 ST
7
Picarbutrazox provides early-season protection against Pythium and Phytophthora spp. that
cause seed rot and damping-off.
Sedaxane is active against seed decay, seedling blight, and damping-off caused by
Rhizoctonia spp.
To comply with 40 CFR 153.155, all treated seed must be colored with an EPA-approved dye
or colorant of a suitable color to prevent accidental use as food for man or feed for animals.
3.1 Resistance Management
For resistance management, please note that A23545 ST contains fludioxonil, a Group 12
@@ -365,37 +301,34 @@ action. Sedaxane is a succinate dehydrogenase inhibitor (SDHI) and belongs to th
carboxamide class of chemistry, which disrupts cellular respiration and energy generation.
To delay fungicide resistance, take one or more of the following steps:
• Rotate the use of A23545 ST or other Group 4, Group 7, Group 12, or Group U17
x Rotate the use of A23545 ST or other Group 4, Group 7, Group 12, or Group U17
fungicides within a growing season sequence with different groups that control the same
pathogens.
• Use tank mixtures with fungicide from a different group that are equally effective on the
x Use tank mixtures with fungicide from a different group that are equally effective on the
target pest when such use is permitted. Use at least the minimum application rate as
labeled by the manufacturer.
• Adopt an integrated disease management program for fungicide use that includes
x Adopt an integrated disease management program for fungicide use that includes
scouting, uses historical information related to pesticide use and crop rotation, and
considers host plant resistance, impact of environmental conditions on disease
development, disease thresholds, as well as cultural, biological and other chemical control
practices.
• Where possible, make use of predictive disease models to effectively time fungicide
x Where possible, make use of predictive disease models to effectively time fungicide
applications. Note that using predictive models alone is not sufficient to manage
resistance.
• Monitor treated fungal populations for resistance development.
• Contact your local extension specialist or certified crop advisor for any additional pesticide
x Monitor treated fungal populations for resistance development.
x Contact your local extension specialist or certified crop advisor for any additional pesticide
resistance-management and/or Integrated Pest Management (IPM) recommendations for
specific crop and pathogens.
A23545 ST
8
• For further information or to report suspected resistance contact Syngenta at 1-866-
x For further information or to report suspected resistance contact Syngenta at 1-866-
Syngent(a) (866-796-4368). You can also contact your pesticide distributor or university
extension specialist to report resistance.
Syngenta encourages responsible product stewardship to ensure effective long-term control
of the fungal diseases on this label.
A23545 ST
9
of the fungal diseases on this label.
4.0 APPLICATION DIRECTIONS
Important: Always recirculate A23545 ST thoroughly before using.
@@ -419,12 +352,19 @@ ST with inoculants.
Continuous agitation or mixing of the slurry mixture is necessary to prevent settling out of the
solution. Clean out any unused product from the treater after treating or maintain constant
agitation if the leftover slurry will be maintained overnight.
[Use an EPA-approved dye or colorant that imparts an unnatural color to the seed as
required in 40 CFR 153.155(c).]
Required Dye Statement: Seed treated with this product must be visually identifiable from
untreated seed by the use of an approved colorant or dye to prevent accidental use of treated
seed as food for humans or feed for animals. Refer to 21 CFR, Part 2.25. Any colorant or dye
added to treated seed must be cleared for use in accordance with 40 CFR, Part 153.155(c).
Allow seed to dry before bagging.
Follow planter manufacturer’s specifications for use of talc or other hopper box additives at
planting. Seed must be completely dry before adding to planter.
4.1 Tank Mixtures
4.1 Tank Mixtures
A23545 ST
9
A23545 ST mixes easily with water and other water-based seed treatments manufactured by
Syngenta. When mixing with products from other manufacturers, test the compatibility prior
to use by conducting a jar test: mix all intended seed treatments with the appropriate amount
@@ -440,92 +380,152 @@ A23545 ST
5.0 RESTRICTIONS
• DO NOT use for at-plant applications (e.g., hopper box, planter box). This product is to be
x DO NOT use for at-plant applications (e.g., hopper box, planter box). This product is to be
applied as a water-based slurry through standard slurry- or mist-type commercial seed
treatment equipment.
• DO NOT apply this product in a way that will contact workers or other persons, either
x DO NOT apply this product in a way that will contact workers or other persons, either
directly or through drift.
• DO NOT use treated seed for feed, food, or oil purposes.
• Store treated seed away from feed and foodstuffs.
• DO NOT allow children, pets, or livestock to have access to treated seed.
• Wear long-sleeved shirt, long pants and chemical resistant gloves when handling treated
x DO NOT use treated seed for food, feed, or oil purposes.
x Store treated seed away from food and feedstuffs.
x DO NOT allow children, pets, or livestock to have access to treated seed.
x Wear long-sleeved shirt, long pants and chemical resistant gloves when handling treated
seed.
• Treated seeds exposed on soil surface may be hazardous to wildlife. Cover or collect
treated seeds spilled during loading or planting.
• Treated seed must be planted into the soil at a depth greater than 1 inch.
• Dispose of all excess treated seed. Leftover treated seed may be double sown around
the headland or buried away from water sources in accordance with local requirements.
• DO NOT contaminate water bodies when disposing of planting equipment washwaters.
• Dispose of seed packaging in accordance with local requirements.
• DO NOT apply more than 0.052 lb ai/A (23 g ai/A) per calendar year of mefenoxam- or
x Treated seed exposed on soil surface may be hazardous to wildlife. Cover or collect
treated seed spilled during loading and planting (such as in row ends).
x Treated seed must be planted into the soil at a depth greater than 1 inch.
x
x DO NOT contaminate water bodies when disposing of planting equipment washwaters.
x Dispose of seed packaging in accordance with local requirements.
x DO NOT apply more than 0.052 lb ai/A (23 g ai/A) per calendar year of mefenoxam- or
metalaxyl-containing products as a seed treatment on soybean.
• In the event of a crop failure or harvest of a crop grown from seed treated with A23545
x In the event of a crop failure or harvest of a crop grown from seed treated with A23545
ST, the field may be replanted immediately to corn (field, pop, seed, or sweet) or soybean.
For any other crop, the minimum plant-back interval is 30 days from the date the treated
seed was planted.
• Maximum usage when applying metalaxyl- and mefenoxam- containing products to
x Maximum usage when applying metalaxyl- and mefenoxam- containing products to
the same crop within the same season: DO NOT apply more than the maximum yearly
total application rate for the active ingredient as stated on the label of the product
containing the lowest yearly total on that crop.
• DO NOT apply more than 0.017 lb ai/A (7.5 g ai/A) per calendar year of picarbutrazox-
x DO NOT apply more than 0.017 lb ai/A (7.5 g ai/A) per calendar year of picarbutrazox-
containing products as a seed treatment.
• DO NOT apply more than 0.0167 lb ai/A (7.6 g ai/A) per calendar year of sedaxane-
x DO NOT apply more than 0.0167 lb ai/A (7.6 g ai/A) per calendar year of sedaxane-
containing products as a seed treatment.
• Soybean seeds treated with this product contain 0.0038 mg fludioxonil/seed, 0.015 mg
x Soybean seeds treated with this product contain 0.0038 mg fludioxonil/seed, 0.015 mg
mefenoxam/seed, 0.0038 mg sedaxane/seed, and 0.0038 mg picarbutrazox/seed.
• This treated seed may be planted on the same acres up to 2 times per year.
x This treated seed may be planted on the same acres up to 2 times per year.
A23545 ST
11
6.0 SEED CONTAINER LABEL REQUIREMENTS
The Federal Seed Act requires that containers of treated seeds must be labeled with the
following statements:
• This seed has been treated with fludioxonil, mefenoxam, picarbutrazox, and sedaxane
fungicides.
• DO NOT use for feed, food, or oil purposes.
6.1 Use of On-Farm Treated Seed (when treated seed are not
for sale or distribution)
Treated seed sold or distributed for a use not permitted by the following labeling does not
qualify as an exempted treated article under 40 CFR 152.25(a) and is therefore sale or
distribution of an unregistered pesticide, pursuant to FIFRA section 12.
The U.S. Environmental Protection Agency requires the following statements on containers
containing seed treated with A23545 ST:
• Store treated seed away from feed and foodstuffs.
• DO NOT allow children, pets, or livestock to have access to treated seed.
• Wear long-sleeved shirt, long pants and chemical resistant gloves when handling treated
x Store treated seed away from food and feedstuffs.
x DO NOT allow children, pets, or livestock to have access to treated seed.
x Treated seed are for planting purposes only. DO NOT use for food, feed, or oil purposes.
DO NOT use treated seed for fuel or ethanol production purposes.
x Wear long-sleeved shirt, long pants, shoe s, socks, and chemical-resistant gloves when
handling treated seed.
x DO NOT plant treated seed by broadcasting to the soil surface. Ensure that all planted
seeds are thoroughly incorporated by the planter during planting. Additional incorporation
may be required to thoroughly cover exposed seeds.
x Treated seed exposed on the soil surface may be hazardous to wildlife. Cover or collect
treated seed spilled during loading and planting (such as in row ends).
x Treated seed must be planted into the soil at a depth greater than 1 inch.
x Manage excess treated seed (e.g., spilled, u nused, or expired treated seed) by one or
more of the following methods:
o Collect excess treated seed for reuse for planting.
o Bury excess treated seed (only allowed if totaling 1 pound or less) at least 30 feet
away from bodies of water at a depth of 6 inches or double the planting depth,
whichever is greater.
o Dispose of excess treated seed by plac ing them in a landfill in accordance with
applicable laws in your state.
o Return excess treated seed to the supplier if permitted by the state.
x DO NOT contaminate bodies of water when disposing of equipment wash water.
x Advisory Dust-Reducing Technique: The use of seed flow lubricants or polymer
coatings may help decrease the amount of dust released during planting. Follow the
recommendations of the planter manufacturer regarding the use of seed flow lubricants.
A23545 ST
12
6.2 Seed Treatment in Commercial Facilities or Seed
Treatment on Farm (when treated seed are to be sold or
distributed) – Seed Bag Labeling Requirements
The Federal Seed Act requires that containers of treated seed must be labeled with the
following statements:
x This seed has been treated with fludioxonil, mefenoxam, picarbutrazox, and sedaxane
fungicides.
x DO NOT use for food, feed, or oil purposes.
The U.S. Environmental Protection Agency requires that bags containing treated seed shall
be labeled with the following statements. Any seed treated with A23545 ST that is sold or
distributed without these statements or that is sold or distributed for a use not permitted by
the following labeling does not qualify as an exempted treated article under 40 CFR
152.25(a) and is therefore sale or distribution of an unregistered pesticide, pursuant to FIFRA
section 12(a)(1)(A).
This seed has been treated with A23545 ST (EPA Reg No. 100-1731) containing fludioxonil,
mefenoxam, picarbutrazox, and sedaxane. Any seed treated with A23545 ST that is sold or
distributed for a use not permitted by the following labeling does not qualify as an exempted
treated article under 40 CFR 152.25(a) and is therefore sale or distribution of an unregistered
pesticide, pursuant to FIFRA section 12(a)(1)(A).
x The contents of this bag are for planting purposes only. DO NOT use for food, feed, or oil
purposes. DO NOT use for fuel or ethanol production purposes.
x Store treated seed away from food and feedstuffs.
x DO NOT allow children, pets, or livestock to have access to treated seed.
x Wear long-sleeved shirt, long pants and chemical resistant gloves when handling treated
seed.
• Treated seeds exposed on soil surface may be hazardous to wildlife. Cover or collect
treated seeds spilled during loading or planting.
• Treated seed must be planted into the soil at a depth greater than 1 inch.
• Dispose of all excess treated seed. Leftover treated seed may be double sown around
the headland or buried away from water sources in accordance with local requirements.
• Excess treated seed may be used for ethanol production only if (1) by-products are not
used for livestock feed and (2) no measurable residues of pesticide remain in the ethanol
by-products that are used for agronomic practice.
• DO NOT contaminate water bodies when disposing of planting equipment washwaters.
• Dispose of seed packaging in accordance with local requirements.
• Groundwater Advisory: Mefenoxam is known to leach through soil into groundwater
x DO NOT plant treated seed by broadcasting to the soil surface. Ensure that all planted
seeds are thoroughly incorporated by the planter during planting. Additional incorporation
may be required to thoroughly cover exposed seeds.
x Treated seed exposed on soil surface may be hazardous to wildlife. Cover or collect
treated seed spilled during loading or planting (such as in row ends).
x Treated seed must be planted into the soil at a depth greater than 1 inch.
x Manage excess treated seed (e.g., spilled, unused, or expired treated seed) by one or
more of the following methods:
o Collect excess treated seed for reuse for planting.
o Bury excess treated seed (only allowed if totaling 1 pound or less) at least 30 feet
away from bodies of water at a depth of 6 inches or double the planting depth,
whichever is greater.
o Dispose of excess treated seed by plac ing them in a landfill in accordance with
applicable laws in your state.
o Return excess treated seed to the supplier if permitted by the state.
x DO NOT contaminate water bodies when disposing of planting equipment washwaters.
x Dispose of seed packaging in accordance with local requirements.
x In the event of a crop failure or harvest of a crop grown from seed treated with A23545
ST, the field may be replanted immediately to corn (field, pop, seed, or sweet) or soybean.
A23545 ST
13
For any other crop, the minimum plant-back interval is 30 days from the date the treated
seed was planted.
x DO NOT apply more than 0.052 lb ai/A (23 g ai/A) per calendar year of mefenoxam- or
metalaxyl-containing products as a seed treatment.
x Maximum usage when applying metalaxyl- and mefenoxam- containing products to
the same crop within the same season: DO NOT apply more than the maximum yearly
total application rate for the active ingredient as stated on the label of the product
containing the lowest yearly total on that crop.
x DO NOT apply more than 0.017 lb ai/A (7.5 g ai/A) of picarbutrazox-containing products
or 0.0167 lb ai/A (7.6 g ai/A) of sedaxane-containing products per calendar year as a seed
treatment.
x Soybean seeds treated with this product contain 0.0038 mg fludioxonil/seed, 0.015 mg
mefenoxam/seed, 0.0038 mg sedaxane/seed, and 0.0038 mg picarbutrazox/seed.
x This treated seed may be planted on the same acres up to 2 times per year.
x Groundwater Advisory: Mefenoxam is known to leach through soil into groundwater
under certain conditions as a result of label use. Fludioxonil has properties and
characteristics associated with chemicals detected in groundwater. These chemicals may
leach into groundwater if used in areas where soils are permeable, particularly where the
water table is shallow.
• In the event of a crop failure or harvest of a crop grown from seed treated with A23545
ST, the field may be replanted immediately to corn (field, pop, seed, or sweet) or soybean.
For any other crop, the minimum plant-back interval is 30 days from the date the treated
seed was planted.
• DO NOT apply more than 0.052 lb ai/A (23 g ai/A) per calendar year of mefenoxam- or
metalaxyl-containing products as a seed treatment.
• Maximum usage when applying metalaxyl- and mefenoxam- containing products to
the same crop within the same season: DO NOT apply more than the maximum yearly
total application rate for the active ingredient as stated on the label of the product
containing the lowest yearly total on that crop.
• DO NOT apply more than 0.017 lb ai/A (7.5 g ai/A) per calendar year of picarbutrazox-
containing products as a seed treatment.
• DO NOT apply more than 0.0167 lb ai/A (7.6 g ai/A) per calendar year of sedaxane-
containing products as a seed treatment.
• Soybean seeds treated with this product contain 0.0038 mg fludioxonil/seed, 0.015 mg
mefenoxam/seed, 0.0038 mg sedaxane/seed, and 0.0038 mg picarbutrazox/seed.
• This treated seed may be planted on the same acres up to 2 times per year.
x [All seed bag tags must be legible and set in at least 8-point font size.]
A23545 ST
12
14
7.0 SEED TREATMENT DIRECTIONS
7.1 Soybean
@@ -577,10 +577,10 @@ The product rates per 100 lb seed and per 140,000 seed are based on an average s
soybeans/lb. If treating seed with a different average seed weight, recalculate the appropriate product use
rate.
USE RESTRICTIONS
• Refer to Section 6.0 for additional product use restrictions.
x Refer to Section 6.0 for additional product use restrictions.
A23545 ST
13
15
8.0 STORAGE AND DISPOSAL
STORAGE AND DISPOSAL
@@ -630,7 +630,7 @@ and local authorities.
CONTAINER IS NOT SAFE FOR FOOD, FEED, OR DRINKING WATER.
A23545 ST
14
16
9.0 CONDITIONS OF SALE AND LIMITATION OF WARRANTY
AND LIABILITY
@@ -669,16 +669,17 @@ foregoing Conditions of Sale and Limitation of Warranty and Liability, which may
modified except by written agreement signed by a duly authorized representative of
SYNGENTA.
Cruiser®, Fortenza®, Saltro®, Vayantis®, the ALLIANCE FRAME
Cruiser
®, Fortenza®, Saltro®, Vayantis®, the ALLIANCE FRAME
the SYNGENTA Logo, and the PURPOSE ICON
are Trademarks of a Syngenta Group Company
Viton™ is a trademark of The Chemours Company FC, LLC
©20XX Syngenta
© 20XX Syngenta
A23545 ST
15
17
For non-emergency (e.g., current product information), call
@@ -693,5 +694,5 @@ Greensboro, North Carolina 27419-8300
A23545 ST XXXX NEW-D 0422-CL – jeb 02/17/2023
000100-XXXXX.20220414D.A23545_ST_NEW_APR2022-CL.pdf
A23545 ST 1731 MAS 0323 AMEND-B 0226 – CL – jeb – 05/22/2026
000100-01731.20260216B.A23545_ST_AMEND_FEB2026-CL.pdf