SmartBlock

AMVAC · 3-decen-2-one 98.0% · EPA Reg 5481-571 Document last checked 2026-05-30

According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 5481-571 →

SmartBlock is a potato sprout inhibitor and post-harvest disease suppressor designed for indoor use only. It is applied exclusively through fogging equipment. The active ingredient is 3-decen-2-one at a concentration of 7.05 lbs per gallon. This product is used in potato storage to control sprouting by destroying the growing meristem and to suppress post-harvest diseases like dry rot (Fusarium spp.) and pink rot (Phytophthora erythroseptica). For sprout control, application rates vary based on the target: non-sprouting suberized potatoes require 2.1–3.1 fl. oz. per ton, while potato sprouts (0.2 inch or below) require 2.1–3.1 fl. oz. per ton, and larger sprouts (0.2 to 0.5 inch) require up to 4.2 fl. oz. per ton. For disease suppression, the rate is 3.1 to 4.2 fl. oz. per ton. To improve potato quality, rates of 2.1 to 4.2 fl. oz. per ton can be used. Handling requires significant personal protective equipment, including long sleeve shirts, long pants, socks, chemical-resistant footwear, chemical-resistant gloves, goggles, face shield, and a NIOSH-approved respirator. Do not apply directly to water or areas where surface water is present. Do not use in combination with dimethyl naphthylate (DIMN) products. After application, do not reenter the treatment area for 24 hours unless wearing full PPE.

Pests covered (4)

Potato sproutsPost-harvest diseases (dry rot, pink rot)Potato quality improvement (tuber rigidity/bruising)Scale Insects

Areas treatable (1)

Potato storage

How to treat each type of area 3

Potato storage

0.2 to 0.5 inch sprouts

Target pest	Location	Rate	Unit	Label notes
Potato sprouts	Indoor	2.1-4.2	fl. oz. per ton	Use fogging equipment only.

Target pest	Location	Rate	Unit	Label notes
Post-harvest diseases (dry rot, pink rot)	Indoor	3.1-4.2	fl. oz. per ton
Potato quality improvement (tuber rigidity/bruising)	Indoor	2.1-4.2	fl. oz. per ton

Worker safety

Re-entry interval (REI) 24

PPE required Wear coversall over long sleeve shirt and long pants, socks, chemical resistant footwear, chemical-resistant gloves, goggles, face shield, or shielded safety glasses and a NIOSH approved respirator with any N, R, or PF HE filter.

Timing & weather

Apply to non-sprouting potatoes prior to dormancy break.
For best results, apply when approximately 75% of tubers show visible signs of creeping.
Do not treat when visible signs of condensation (wet spots) are present.

Use restrictions 5

For indoor use only.
Use through fogging equipment only.
Do not apply directly to water or areas where surface water is present.
Do not use in combination with dimethyl naphthylate (DIMN) products.
Do not reenter treatment area for 24 hours without required PPE.

Label SDS

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