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Trigard OMC

Syngenta · EPA Reg 100-790 · Insecticide Document last checked 2026-05-30

About this product

Active ingredient Pending extraction
Manufacturer Syngenta
Category Insecticide

Full details for Trigard OMC

Source product label ↗ Open the catalog source label while the local copy is reviewed. Verify the product name, EPA registration number, and revision before use. Source safety data sheet ↗ Open the catalog source SDS while the local copy is reviewed. Verify the exact product and revision before relying on it. EPA registration data Reg. 100-790 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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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. 100-790 →

Trigard OMC is an insecticide designed specifically as a seed treatment for controlling onion maggots in bulb onions. It is formulated as a wettable powder containing 75.0% Cyromazine (CAS No. 66215-27-8) as the active ingredient. This product is intended for use by licensed commercial seed treatment companies only. It works by treating the seeds before planting to provide protection against onion maggot infestations. When using this product, users should be aware of environmental hazards, such as the potential for contamination of water, including surface water, interstitial areas, or groundwater, especially in areas with permeable soils or shallow water tables. For pest management efficacy, it is recommended to rotate Trigard OMC with products from other chemical classes and to integrate it with non-chemical strategies like crop rotation and field sanitation. Users should follow specific rotational crop intervals, such as 0 days for leafy vegetables (except leafy Brassica), 30 days for sweet corn, radishes, and carrots, and 300 days for any other crops. Note that not all bulb vegetables grown from seed treated with Trigard OMC within 60 days of planting may be suitable for certain uses. Always follow all precautionary statements regarding handling, storage, and disposal to ensure safety and compliance.

Pests covered (2)
onion maggotOnion Maggots
Areas treatable (1)
bulb onions

Application instructions from the label 1

bulb onions

Seed treatment chemical

Target pest
onion maggot
Location
Outdoor

Mixing instructions 1

For pests Amount Per Finished strength Label notes
onion maggot 6.6 lbs 100 lbs of seed 4.9 lbs active ingredient per 100 lbs of seed Use standard seed treatment equipment designed for wettable powders.

Worker safety

PPE required CAUTION: Avoid contact with eyes, skin, or clothing. Avoid breathing dust.

Timing & weather

Use restrictions 4