crop-chem-docs/corpus/epa_ppls/100-1720.md

# A23544 ST

- EPA Reg No: **100-1720**
- Registrant: SYNGENTA CROP PROTECTION, LLC
- Signal word: Caution
- Active ingredients: Picarbutrazox (0.33%); Thiamethoxam (16.3%); Fludioxonil (0.82%); Metalaxyl-M (4.89%); Sedaxane (0.82%)
- Label accepted: 2022-09-16
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000100-01720-20220916.pdf

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Registration Notice Unconditional v.20150320 
 
 
 
 
U.S. ENVIRONMENTAL PROTECTION AGENCY 
Office of Pesticide Programs 
Registration Division (7505P) 
1200 Pennsylvania Ave., N.W. 
Washington, D.C. 20460 
 
EPA Reg. Number: 
 
100-1720 
 
Date of Issuance: 
 
9/16/22 
NOTICE OF PESTICIDE: 
 X Registration 
 Reregistration 
 
Term of Issuance: 
Unconditional 
 (under FIFRA, as amended) 
Name of Pesticide Product: 
A23544 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 accepted 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. 
 
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 unconditionally registered in accordance with FIFRA section 3(c)(5) provided that you: 
 
1. Submit and/or cite all data required for registration/reregistration/registration review of your 
product when the Agency requires all registrants of similar products to submit such data. 
 
2. The data requirements for storage stability and corrosion characteristics (Guidelines 830.6317 
and 830.6320) are not satisfied. A one year study is required to satisfy these data requirements. 
You have 18 months from the date of registration to provide these data. 
 
 
Signature of Approving Official: 
 
Shaja B. Joyner, Product Manager 20 
Fungicide-Herbicide Branch 
Registration Division 7505P 
 
 
Date: 
 
 
 9/16/22 
EPA Form 8570-6

Page 2 of 2 
EPA Reg. No. 100-1720 
Decision No. 578570 
 
 
 
 
 
3. Make the following label changes before you release the product for shipment: 
 
• Revise the EPA Registration Number to read, “EPA Reg. No. 100-1720.” 
 
4. Submit one copy of the revised 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 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. 
 
If these conditions are not complied with, the registration will be subject to cancellation in accordance 
with FIFRA section 6. Your release for shipment of the product constitutes acceptance of these 
conditions. A stamped copy of the label is enclosed for your records. Please also note that the record for 
this product currently contains the following CSFs: 
 
• Basic CSF dated 08/19/2021 
• Alternate CSF 1 08/19/2021 
 
If you have any questions, please contact Lindsay DeMers via email at demers.lindsay@epa.gov. 
 
 
Enclosure

(Master label) 
 
THIAMETHOXAM GROUP 4A INSECTICIDE 
MEFENOXAM GROUP 4 FUNGICIDE 
FLUDIOXONIL GROUP 12 FUNGICIDE 
SEDAXANE GROUP 7 FUNGICIDE 
PICARBUTRAZOX GROUP U17 FUNGICIDE 
 
A23544 ST 
 
 
Insecticide with Fungicides 
 
A seed treatment product for protection against damage from listed insects, seed-borne 
diseases, and seedling diseases on soybean 
 
Active Ingredients: 
Thiamethoxam
1 ............................................................................. 16.3 % 
Mefenoxam2 .................................................................................... 4.89 % 
Fludioxonil3 ...................................................................................... 0.82 % 
Sedaxane4 ....................................................................................... 0.82 % 
Picarbutrazox5 ................................................................................. 0.33 % 
Other Ingredients: 76.84 % 
Total: 100.00 % 
 
1CAS No. 153719-23-4 
2CAS No. 70630-17-0 and CAS No. 69516-34-3 
3CAS No. 131341-86-1 
4CAS No. 874967-67-6 
5CAS No. 500207-04-5 
 
One gallon of A23544 ST contains 1.52 lb thiamethoxam, 0.46 lb mefenoxam, 0.08 lb 
fludioxonil, 0.08 lb sedaxane, and 0.03 lb picarbutrazox. 
 
KEEP OUT OF REACH OF CHILDREN. 
 
CAUTION 
 
See additional precautionary statements and directions for use on label. 
 
EPA Reg. No. 100-XXXX 
EPA Est. 
 
Net Contents 
09/16/2022
100-1720

2 
FIRST AID 
If swallowed • 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. 
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. 
Have the product container or label with you when calling a poison control center or 
doctor or going for treatment. 
HOTLINE NUMBER 
For 24-Hour Medical Emergency Assistance (Human or Animal) 
Or Chemical Emergency Assistance (Spill, Leak, Fire or Accident) 
Call 
1-800-888-8372 
 
PRECAUTIONARY STATEMENTS 
 
Hazards to Humans and Domestic Animals 
 
CAUTION 
 
Harmful if swallowed or absorbed through the skin. Avoid contact with skin, eyes, or 
clothing. Wash thoroughly with soap and water after handling, and before eating, 
drinking, chewing gum, using tobacco, or using the toilet. Remove and wash 
contaminated clothing before reuse. 
 
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, nitrile 
rubber ≥ 14 mils, neoprene rubber ≥ 14 mils, polyvinyl chloride (PVC) ≥ 14 mils, or 
Viton™ ≥ 14 mils 
• Shoes plus socks 
 
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 laundry.

3 
Engineering Controls 
 
When handlers use closed systems 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 specified in the WPS. 
 
User Safety Recommendations 
 
Users should: 
• 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 and change 
into clean clothing. 
 
Environmental Hazards 
 
This product is toxic to wildlife, freshwater fish, and estuarine/marine fish and highly 
toxic to aquatic invertebrates. Runoff may be hazardous to aquatic organisms in 
neighboring areas. DO NOT contaminate water when disposing of equipment 
washwater or rinsate. Exposed treated seed may be hazardous to wildlife, fish, and 
aquatic invertebrates. Promptly cover or collect seeds spilled during loading or planting. 
 
Pollinator Precautions 
Thiamethoxam is highly toxic to bees exposed to direct treatment, and effects may be 
possible as a result of exposure to translocated residues in blooming crops. 
 
Groundwater Advisory 
Mefenoxam is known to leach through soil into groundwater under certain conditions as 
a result of agricultural use. Thiamethoxam and fludioxonil have properties and 
characteristics associated with chemicals detected in groundwater. These chemicals 
may leach into the groundwater if used in areas where soils are permeable, particularly 
where the water table is shallow, and may result in groundwater contamination. 
 
Surface Water Advisory 
This product may impact surface water quality due to runoff of rain water. This is 
especially true for poorly draining soils and soils with shallow groundwater. This 
product is classified as having high potential for reaching surface water via runoff for 
several months or more after application. 
 
Physical or Chemical Hazards 
 
DO NOT store near or use with oxidizing agents. DO NOT mix with or allow to come 
into contact with oxidizing agents. Hazardous chemical reaction may occur.

4 
CONDITIONS OF SALE AND LIMITATION OF WARRANTY AND LIABILITY 
 
NOTICE: Read the entire Directions for Use and Conditions of Sale and Limitation of 
Warranty and Liability before buying or using this product. If the terms are not 
acceptable, return the product at once, unopened, and the purchase price will be 
refunded. 
The Directions for Use of this product must be followed carefully. It is impossible to 
eliminate all risks inherently associated with the use of this product. Ineffectiveness or 
other unintended consequences may result because of such factors as manner of use 
or application, presence of other materials or other influencing factors in the use of the 
product, which are beyond the control of SYNGENTA CROP PROTECTION, LLC or 
Seller. To the extent permitted by applicable law, Buyer and User agree to hold 
SYNGENTA and Seller harmless for any claims relating to such factors. 
 
SYNGENTA warrants that this product conforms to the chemical description on the label 
and is reasonably fit for the purposes stated in the Directions for Use, when used in 
accordance with directions under normal use conditions. To the extent permitted by 
applicable law: (1) this warranty does not extend to the use of the product contrary to 
label instructions, or under conditions not reasonably foreseeable to or beyond the 
control of Seller or SYNGENTA, and, (2) Buyer and User assume the risk of any such 
use. TO THE EXTENT PERMITTED BY APPLICABLE LAW, SYNGENTA MAKES NO 
WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR 
PURPOSE NOR ANY OTHER EXPRESS OR IMPLIED WARRANTY EXCEPT AS 
WARRANTED BY THIS LABEL. 
 
To the extent permitted by applicable law, in no event shall SYNGENTA be liable for 
any incidental, consequential or special damages resulting from the use or handling of 
this product. TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE 
EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE EXCLUSIVE LIABILITY 
OF SYNGENTA AND 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 THE PRODUCT OR, AT THE ELECTION 
OF SYNGENTA OR SELLER, THE REPLACEMENT OF THE PRODUCT. 
 
SYNGENTA and Seller offer this product, and Buyer and User accept it, subject to the 
foregoing Conditions of Sale and Limitation of Warranty and Liability, which may not be 
modified except by written agreement signed by a duly authorized representative of 
SYNGENTA.

5 
DIRECTIONS FOR USE 
 
It is a violation of federal law to use this product in a manner inconsistent with its 
labeling. 
 
Use is permitted as an end-use seed treatment on agricultural establishments and in 
commercial seed treatment facilities. 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 liquid-type seed-treatment equipment. Use seed treaters with atomizers or 
spinning discs for better product coverage on the seed. 
DO NOT apply this product in a way that will contact workers or other persons, either 
directly or through drift. Only protected handlers may be in the area during application. 
For any requirements specific to your state or tribe, consult the agency responsible for 
pesticide regulation. Notify state and/or federal authorities and Syngenta immediately if 
you observe any adverse environmental effects due to use of this product.
 
 
FAILURE TO FOLLOW THE DIRECTIONS FOR USE AND PRECAUTIONS ON THIS 
LABEL MAY RESULT IN CROP INJURY, POOR INSECT AND/OR DISEASE 
CONTROL, AND/OR ILLEGAL RESIDUES. 
 
Treatment of highly mechanically scarred or damaged seed or seed known to be of low 
vigor and poor quality may result in reduced germination and/or reduction of seed and 
seedling vigor. Treat a quantity of seed using equipment similar to that planned for 
treating the total seed lot. Prior to treatment, conduct germination tests on a portion of 
seed before committing the total seed lot to a selected seed treatment. 
 
Due to seed quality, crop or variety sensitivity, and seed storage conditions beyond the 
control of Syngenta, no claims are made to guarantee the germination of seed or 
propagating material for all crop seed when treated with A23544 ST. 
 
Maximum usage when applying both 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.

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 agricultural workers on farms, forests, nurseries, and greenhouses, 
and handlers of agricultural pesticides. It contains requirements for training, 
decontamination, notification, and emergency assistance. It also contains specific 
instructions and exceptions pertaining to the statements on this label about 
personal protective equipment (PPE) and restricted-entry interval. The 
requirements in this box only apply to uses of this product that are covered by the 
Worker Protection Standard. 
 
DO NOT enter or allow worker entry into treated areas during the restricted-
entry interval (REI) of 48 hours. Exception: If the seed is treated with the 
product and the treated seed is planted, the Worker Protection Standard, under 
certain circumstances, allows workers to enter the treated area if there will be no 
contact with anything that has been 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 
 
 
PRODUCT INFORMATION 
 
A23544 ST is a seed treatment product containing the active ingredients thiamethoxam 
insecticide and fludioxonil, mefenoxam, sedaxane, and picarbutrazox fungicides. 
A23544 ST protects against damage from listed early-season insects and soil-borne 
and seed-borne diseases of soybeans. 
 
Thiamethoxam is a systemic seed treatment insecticide belonging to the neonicotinoid 
class of chemistry. Thiamethoxam protects against listed chewing and sucking insects 
through contact and ingestion. 
 
Mefenoxam fungicide is active against Pythium, Phytophthora and systemic downy 
mildew. 
 
Fludioxonil fungicide is active against Fusarium and Rhizoctonia, and suppresses seed-
borne Sclerotinia and Phomopsis spp.

7 
Sedaxane fungicide is active against seed decay, seedling blight and damping-off 
caused by Rhizoctonia spp. 
 
Picarbutrazox fungicide is active against diseases caused by Pythium and Phytophthora 
spp. 
 
Resistance Management 
 
For resistance management, please note that A23544 ST contains Group 4 
(mefenoxam), Group 7 (sedaxane), Group 12 (fludioxonil), and Group U17 
(picarbutrazox) fungicides. Any fungal population may contain individuals naturally 
resistant to A23544 ST and other Group 4, Group 7, Group 12, or Group U17 
fungicides. A gradual or total loss of pest control may occur over time if these fungicides 
are used repeatedly in the same fields. Other resistance mechanisms that are not linked 
to site of action but specific for individual chemicals, such as enhanced metabolism, 
may also exist. Appropriate resistance-management strategies should be followed. 
 
Mefenoxam belongs to the phenylamide class of chemistry, which interferes with fungal 
RNA synthesis. Sedaxane is a succinate dehydrogenase inhibitor (SDHI) and belongs 
to the carboxamide class of chemistry, which disrupt cellular respiration and energy 
generation. Fludioxonil belongs to the phenylpyrrole class of chemistry, which interferes 
with osmotic signal transduction. Picarbutrazox belongs to the tetra-zolyloximes class 
of fungicides and is not known to be cross-resistant with fungicides that have different 
modes of action. 
 
To delay fungicide resistance, take one or more of the following steps: 
 
• Rotate the use of A23544 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 fungicides 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 scouting, uses historical information related to pesticide use, and crop 
rotation, and which 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 application. 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 resistance-management and/or Integrated Pest Management (IPM) 
recommendations for specific crops and pathogens.

8 
• For further information or to report suspected resistance contact Syngenta at 1-
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. 
 
A23544 ST contains a Group 4A insecticide (thiamethoxam, a systemic insecticide 
belonging to the neonicotinoid class of chemistry, which includes nicotinic acetylcholine 
receptor (nAChR) agonists). Insect biotypes with acquired or inherent resistance to 
Group 4A insecticides may eventually dominate the insect population if Group 4A 
insecticides are used repeatedly as the predominant method of control for targeted 
species. This may result in partial or total loss of control of those species by A23544 ST 
or other Group 4A insecticides. 
 
In order to maintain susceptibility to this class of chemistry: 
 
• Avoid using Group 4A insecticides exclusively for season-long control of insect 
species with more than one generation per crop season. 
• For insect species with successive or overlapping generations, apply A23544 ST or 
other Group 4A insecticides using a “treatment window” approach. A treatment 
window is a period of time as defined by the stage of crop development and/or the 
biology of the pests of concern. Within the treatment window, depending on the 
length of residual activity, single or consecutive applications may be made using 
seed, in-furrow, or foliar treatments unless otherwise excluded by product labels. DO 
NOT exceed the maximum amount of this insecticide allowed per growing season. 
• Following a treatment window of Group 4A insecticides, rotate to a treatment window 
of effective products with a different mode of action before making additional 
applications of Group 4A insecticides. 
• A treatment window rotation, along with other IPM practices for the crop and use 
area, is considered an effective strategy for preventing or delaying a pest’s ability to 
develop resistance to this class of chemistry. 
• Use products at their full, specified doses. 
• Use appropriate, well-maintained equipment. Use specified water volumes and apply 
at optimal temperatures in order to obtain optimal treatment. 
• When rate ranges are given, use the higher rate within the listed rate range when 
insect pressure is expected to be high. 
• If resistance is suspected, DO NOT reapply A23544 ST or any other Group 4A 
insecticides. 
 
Other Insect Resistance Management (IRM) practices include: 
 Incorporating IPM techniques into your insect control program 
 Monitoring treated insect populations for loss of field efficacy 
 Using tank-mixtures or premixes with insecticides from a different target site of 
action group as long as the involved products are all registered for the same crop 
outlet and effective rates are applied

9 
 
For additional information on Insect Resistance Management: 
 Contact your local Cooperative Extension Service specialist, certified crop advisor, 
and/or product manufacturer for additional insect resistance management 
recommendations. 
 Visit the Insecticide Resistance Action Committee (IRAC) website. 
 
Syngenta encourages responsible product stewardship to ensure effective long-term 
control of the insects on this label. 
 
APPLICATION DIRECTIONS 
 
Important: Always re-circulate A23544 ST thoroughly before using. 
 
The typical density of A23544 ST is 9.35 pounds per gallon. Consult the manufacturer 
of the application equipment you plan to use for suitability for this application and for 
instructions on operation and calibration of the equipment. Follow the manufacturer 
application instructions for the seed treatment equipment being used. 
 
Apply A23544 ST as a water-based slurry utilizing standard liquid-type-seed treatment 
equipment that provides uniform seed coverage. Seed treaters with atomizers or 
spinning discs are highly recommended for better product coverage on the seed. 
Uneven or incomplete seed coverage may not give the desired level of disease control. 
Thoroughly mix the specified amount of A23544 ST into the required amount of water or 
liquid inoculant for the slurry treater and dilution rate to be used. 
 
Certain crops require addition of inoculants when the seed is treated or planted. 
A23544 ST is compatible with several liquid inoculant products. Consult the maker of 
the inoculant product and a Syngenta Crop Protection representative for directions 
before applying A23544 ST with inoculants. 
 
The total application volume must be sufficient to provide desired level of coverage. 
Dilution is typically done with water or liquid inoculants. The minimum slurry volume to 
achieve adequate coverage is 4.0 fluid ounces per 100 pounds of seed assuming, an 
average seed size of 3,000 seeds per pound (slurry volume will vary depending on seed 
size). More diluent may be required to obtain complete coverage. 
 
Continuous agitation or mixing of the slurry mixture is necessary to prevent settling out 
of the solution. 
 
Allow seed to dry before bagging.

10 
USE RESTRICTIONS 
 
• DO NOT use for at-plant applications (e.g., hopper box, planter box). This product is 
to be used in liquid or slurry treaters only. 
• DO NOT apply this product in a way that will contact workers or other persons, either 
directly or through drift. 
• DO NOT use for feed, food, or oil purposes. 
• Store away from feed and foodstuffs. 
• DO NOT allow children, pets, or livestock to have access to treated seed. 
• Treated seeds exposed on soil surface may be hazardous to wildlife. Promptly 
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 wash 
waters. 
• Dispose of seed packaging in accordance with local requirements. 
• Cover crops planted for erosion control or soil improvement, other than those with 
immediate or 30-day plantback intervals, may be planted sooner than the 120-day 
interval. 
o DO NOT graze or harvest the crop for food or feed. 
• DO NOT use at a rate that will result in more than 0.083 lb thiamethoxam per acre 
(37.8 g ai/A), 0.004 lb fludioxonil per acre (2.0 g ai/A), and 0.0178 lb picarbutrazox 
per acre (8.1 g ai/A) per calendar year as a seed-treatment application. 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. 
• DO NOT apply more than 0.004 lb ai sedaxane per acre (2 g ai/A) per calendar year. 
• DO NOT apply a neonicotinoid insecticide within 45 days of planting seed treated 
with A23544 ST. 
• This seed has been treated with 0.0756 mg thiamethoxam, 0.0226 mg mefenoxam, 
0.0038 mg fludioxonil, 0.0038 mg sedaxane, and 0.0015 mg picarbutrazox per seed. 
• This treated seed may be planted on the same acres up to 2 times per year.

11 
ROTATIONAL CROP RESTRICTIONS 
 
In the event of a crop failure or harvest of a crop grown from seed treated with A23544 
ST, the field may be replanted according to the following schedule of days after the 
A23544 ST-treated seed was planted: 
 
Plantback Interval Table 
Immediate Plantback 
Interval 
30-Day Plantback Interval 120-Day Plantback Interval 
Corn (field, pop, seed, and 
sweet) 
Soybean 
Alfalfa 
Barley 
Brassica (Cole) leafy 
vegetables 
Buckwheat 
Canola 
Cotton 
Cucurbit vegetables 
Dried shelled peas (chickpea 
(garbanzo bean), field pea, 
lentil, and pigeon pea) 
Dry bulb onions 
Fruiting vegetables 
Leafy vegetables 
Legume vegetables 
Mint (peppermint and 
spearmint) 
Oats 
Oilseed crops (black mustard 
seed, borage seed, field 
mustard seed, Indian 
rapeseed, peanuts, 
rapeseed, and safflower 
seed) 
Pearl millet 
Proso millet 
Rice (dry seeded) 
Root vegetables 
Rye 
Sorghum 
Strawberry 
Sunflowers 
Teosinte 
Tobacco 
Triticale 
Tuberous and corm 
vegetables 
Wheat 
Wild rice 
All Other Crops

12 
SEED CONTAINER LABEL REQUIREMENTS 
 
The Federal Seed Act requires that bags containing treated seeds shall be labeled with 
the following statements: 
• This seed has been treated with thiamethoxam insecticide and fludioxonil, 
mefenoxam, picarbutrazox, and sedaxane fungicides. 
• DO NOT use for feed, food, or oil purposes. 
 
In addition, the U.S. Environmental Protection Agency requires the following statements 
on bags containing seeds treated with A23544 ST: 
 
• Store away from feed and foodstuffs. 
• DO NOT allow children, pets, or livestock to have access to treated seed. 
• Wear long-sleeved shirt; long pants; shoes and socks; and chemical-resistant gloves 
when handling treated seed. 
• Treated seeds exposed on soil surface may be hazardous to wildlife. Promptly 
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 wash 
waters. 
• Dispose of seed packaging in accordance with local requirements. 
• Groundwater Advisory: Mefenoxam is known to leach through soil into 
groundwater under certain conditions as a result of agricultural use. Thiamethoxam 
and fludioxonil have properties and characteristics associated with chemicals 
detected in groundwater. These chemicals may leach into the groundwater if used 
in areas where soils are permeable, particularly where the water table is shallow. 
• Surface Water Advisory: This product may impact surface water quality due to 
runoff of rain water. This is especially true for poorly draining soils and soils with 
shallow groundwater. This product is classified as having high potential for reaching 
surface water via runoff for several months or more after application. 
• Pollinator Precautions: Thiamethoxam is highly toxic to bees, and effects are 
possible as a result of exposure to translocated residues in blooming crops. 
• In the event of a crop failure or harvest of a crop grown from this treated seed, the 
field may be replanted immediately to corn (field, pop, seed, or sweet) or soybean. 
After 30 days, the field may be replanted to: Alfalfa, barley, Brassica (Cole) leafy 
vegetables, buckwheat, canola, cotton, cucurbit vegetables, dried shelled peas 
(chickpea (garbanzo bean), field pea, lentil, and pigeon pea), dry bulb onions, 
fruiting vegetables, leafy vegetables, legume vegetables, mint (peppermint and 
spearmint), oats, oilseed crops (black mustard seed, borage seed, crambe seed,

13 
field mustard seed, flax seed, Indian mustard seed, Indian rapeseed, peanuts, 
rapeseed, and safflower seed),pearl millet, proso millet, rice (dry seeded), root 
vegetables, rye, sorghum, strawberry, sunflowers, teosinte, tobacco, triticale, 
tuberous and corm vegetables, wheat, and wild rice. For any other crop, the 
minimum plant back interval is 120 days from the date this treated seed was planted. 
A cover crop other than the crops listed above that is planted for erosion control or 
soil improvement may be planted sooner than the 120-day interval. 
o DO NOT graze or harvest the crop for food or feed. 
• DO NOT use at a rate that will result in more than 0.083 lb thiamethoxam per acre 
(37.8 g ai/A), 0.004 lb fludioxonil per acre (2.0 g ai/A), and 0.0178 lb picarbutrazox 
per acre (8.1 g ai/A) per calendar year as a seed-treatment application. 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 0.004 lb ai sedaxane per acre (2 g ai/A) per calendar year. 
• This seed has been treated with 0.0756 mg thiamethoxam, 0.0226 mg mefenoxam, 
0.0038 mg fludioxonil, 0.0038 mg sedaxane, and 0.0015 mg picarbutrazox per seed. 
• DO NOT apply a neonicotinoid insecticide within 45 days of planting seed treated 
with A23544 ST. 
• This treated seed may be planted on the same acres up to 2 times per year.

14 
CROP USE DIRECTIONS 
 
When applied according to the USE RATE TABLE, A23544 ST provides early-season 
protection against injury by aphids, bean leaf beetle, grape colaspis, leaf miners, leaf 
hoppers, Mexican bean beetle, seed corn maggot, three-cornered alfalfa hopper, thrips, 
white grubs, and wireworm. 
 
A23544 ST provides protection against damping-off and seed borne rots due to 
Pythium, Phytophthora, Fusarium, and Rhizoctonia species and early-season 
Phytophthora root rot. A23544 ST also suppresses seed-borne Sclerotinia and 
Phomopsis species. 
 
USE RATE TABLE
 
 
Crop Rate of A23544 ST 
Soybean Fl oz per 
100 lb seed1 
Fl oz per 
140,000 seeds1 
Grams ai per 
100 kg seed 
Mg ai 
per seed2 
4.2 
 
1.96 Thiamethoxam: 50 
Mefenoxam: 15.0 
Fludioxonil: 2.5 
Sedaxane: 2.5 
Picarbutrazox: 1.0 
Total = 0.1074 mg 
 
 
1 The fl oz A23544 ST per 100 lb seed and per 140,000 seed rates s are based on 3,000 seeds per 
pound. 
2 This seed has been treated with 0.0756 mg ai/seed of thiamethoxam, 0.0226 mg ai/seed of mefenoxam, 
0.0038 mg ai/seed of fludioxonil, 0.0038 mg ai/seed of sedaxane, and 0.0015 mg ai/seed picarbutrazox. 
 
Stored Grain Protection 
 
When treated according to the directions for post-planting protection against listed 
pests, A23544 ST will also provide protection during post treatment storage of the 
soybean seed against damage from the following stored grain insects: Indian Meal 
Moth (Plodia interpunctella), Rice Weevil (Sitophilus oryza), Red Flour Beetle (Tribolium 
castaneum), and Lesser Grain Borer (Rhizopertha dominica). 
 
If the soybean seed to be treated has existing infestations of stored grain insects, 
fumigate the seed with a registered product approved for such use, prior to treating with 
A23544 ST and bagging. 
 
STORAGE AND DISPOSAL 
 
Do not contaminate water, food, or feed by storage or disposal. 
 
Pesticide Storage

15 
Store in a cool, dry place. Storage for extended periods above 90°F is not 
recommended. 
 
For minor spills, leaks, etc., follow all precautions indicated on this label and clean up 
immediately. Take special care to avoid contamination of equipment and facilities 
during cleanup procedures and disposal of wastes. 
 
Pesticide Disposal 
 
Wastes resulting from the use of this product may be disposed of on site or at an 
approved waste disposal facility. If these wastes cannot be used according to label 
instructions, contact your State Pesticide or Environmental Control Agency or the 
Hazardous Waste representative at the nearest EPA Regional Office for guidance in 
proper disposal methods. 
 
Container Handling [(5 gallons or less)] 
Non-refillable container. Do not reuse or refill this container. Triple rinse container (or 
equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining 
contents into application equipment or a mix tank. Drain for 10 seconds after the flow 
begins to drip. Fill the container ¼ full with water and recap. Shake for 10 seconds. 
Pour rinsate into application equipment or a mix tank or store rinsate for later use and 
disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two 
more times. Then offer for recycling if available or puncture and dispose of in a sanitary 
landfill, or by incineration, or by other procedures approved by state and local 
authorities. 
 
Container Handling [(greater than 5 gallons)] 
Non-refillable container. Do not reuse or refill this container. Triple rinse container (or 
equivalent) promptly after emptying. Triple rinse as follows: empty the remaining 
contents into application equipment or a mix tank and drain for 10 seconds after the flow 
begins to drip. Fill the container ¼ full with water. Replace and tighten closures. Tip 
container on its side and roll it back and forth, ensuring at least one complete revolution, 
for 30 seconds. Stand the container on its end and tip it back and forth several times. 
Turn the container over onto its other side and tip it back and forth several times. 
Empty the rinsate into application equipment or a mix tank or store rinsate for later use 
and disposal. Repeat this procedure two more times. Then offer for recycling if 
available or puncture and dispose of in a sanitary landfill, or by incineration, or by other 
procedures approved by state and local authorities. 
 
Container Handling [(greater than 5 gallons)] 
Refillable container. Refill this container with pesticide only. Do not reuse this 
container for any other purpose. Cleaning the container before final disposal is the 
responsibility of the person disposing of the container. Cleaning before refilling is the 
responsibility of the person refilling. To clean container before final disposal, empty the 
remaining contents from this container into application equipment or mix tank. Fill the 
container about 10 percent full with water. Agitate vigorously or re-circulate water with

16 
the pump for 2 minutes. Pour or pump rinsate into application equipment or rinsate 
collection system. Repeat this rinsing procedure two more times. Then offer for 
recycling if available or puncture and dispose of in a sanitary landfill, or by incineration, 
or by other procedures approved by state and local authorities. 
 
CONTAINER IS NOT SAFE FOR FOOD, FEED, OR DRINKING WATER! 
 
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 
 
For non-emergency (e.g., current product information), call 
Syngenta Crop Protection at 1-866-796-4368. 
 
 
Manufactured for: 
Syngenta Crop Protection, LLC 
P. O. Box 18300 
Greensboro, North Carolina 27419-8300 
 
 
A23544 ST XXXX NEW-E 0921-CL – jeb – 09/13/2022 
000100-XXXXX.20210915E.A23544_ST_NEW_SEP2021-CL.pdf