Spectracide Triazicide Insect Killer Granules

Spectracide Triazicide delivers season-long ant control with 0.05% Gamma-Cyhalothrin in a granular formulation that kills over 100 insect types. At 2 pounds per 1,000 square feet, a 20-pound bag covers 25,000 square feet — enough for a half-acre lawn in one application.

The granules work where liquid sprays can’t reach. They penetrate thatch to hit grubs below ground while still controlling surface pests like ants, crickets, and armyworms. You get up to 3 months of residual control from a single treatment.

Coverage Calculations and Application Strategy

The standard 10-pound bag treats 12,500 square feet at the labeled rate. Most Montana residential lawns run 5,000-10,000 square feet, so one bag handles the average property with room to spare. Step up to the 20-pound bag for 25,000 square feet of coverage — that’s contractor territory.

Here’s the math that matters:

Lawn Size	Product Needed	Bag Size
5,000 sq ft	10 lbs	10 lb bag (with 7,500 sq ft leftover)
10,000 sq ft	20 lbs	20 lb bag
15,000 sq ft	30 lbs	2x 10 lb bags
25,000 sq ft	50 lbs	20 lb bag (exact coverage)

Foundation band treatment requires a 3-5 foot perimeter application from the house wall. Calculate this separately from lawn coverage. A 2,000 square foot home with a 4-foot band needs about 640 square feet of coverage — roughly 1.3 pounds of product.

For spot treatment of ant mounds, you’ll need the spreader set to the same settings but work in smaller areas. The granules activate with water, so plan applications around your irrigation schedule or rain forecast.

Spreader Settings That Actually Work

Nobody wants to guess at spreader settings. Scotts Standard and EdgeGuard spreaders both use setting 3. Sta-Green Broadcast also runs at 3. Precision Broadcast needs setting 4.

These settings deliver the labeled 2 pounds per 1,000 square feet without waste. Run your spreader at half speed on the first pass if you’re worried about over-application. The granules flow consistently — no clumping like some cheaper products.

Water in with 1/4 to 1/2 inch immediately after spreading. This activates the Gamma-Cyhalothrin and moves it down to soil level where ants and grubs live. Keep kids and pets off until the grass dries completely.

Why Gamma-Cyhalothrin at 0.05% Works

The 0.05% Gamma-Cyhalothrin concentration provides both fast contact kill and extended residual control. This synthetic pyrethroid disrupts insect nervous systems on contact. Unlike organophosphates, it breaks down slowly in soil — that’s your 3-month protection window.

Spectracide specifically excludes harvester and pharaoh ants from its season-long control claim. These species require different chemistry. For standard pavement ants, carpenter ants, and field ants common in Montana, the product delivers.

EPA registration 9688-250-8845 confirms legal use in Montana, though California adds Prop 65 warnings and New York restricts application within 100 feet of coastal marshes. Standard label restrictions apply near water — the product is toxic to fish and aquatic life.

Common Questions

Does this replace a grub preventer? Yes — Triazicide specifically targets grubs along with surface insects. Apply in late May or early June before Japanese beetle grubs hatch. The granules reach root zone depth where grubs feed.

What’s the real coverage per bag? A 10-pound bag covers 12,500 square feet. A 20-pound bag covers 25,000 square feet. That’s at the full 2 pounds per 1,000 square feet rate. Light infestations might get by with less.

How fast does it work? The label promises “fast-acting contact kill” for both above and below-ground insects. Most users report seeing dead ants within 24-48 hours. Full colony control takes 1-2 weeks as workers carry the active ingredient back to the nest.

Is morning or evening application better? Apply early morning or late evening when insects are most active. This maximizes contact with foraging ants and emerging beetles. Avoid mid-day heat when beneficial insects are active.

What about tick control? Triazicide kills ticks on contact as part of its 100+ insect spectrum. However, some users report inconsistent results on heavy tick populations without repeat treatments. For serious tick problems, consider a dedicated acaricide.

Frequently Asked Questions

Q: How much area does a bag of Spectracide Triazicide Insect Killer Granules cover?

Spectracide Triazicide covers 12,500 square feet with a 10-pound bag or 25,000 square feet with a 20-pound bag when applied at the labeled rate of 2 pounds per 1,000 square feet. Most residential lawns in Montana need just one 10-pound bag for complete coverage.

Q: What spreader setting should be used for Spectracide Triazicide?

Set your Scotts Standard Deluxe or Scotts EdgeGuard spreader to 3, Sta-Green Broadcast to 3, or Precision Broadcast to 4 for proper application of Spectracide Triazicide. These settings deliver the correct 2 pounds per 1,000 square feet coverage rate.

Q: How long does Spectracide Triazicide last after application?

Spectracide Triazicide provides up to 3 months of residual insect control with its 0.05% Gamma-Cyhalothrin formula. The product claims season-long ant control for most species, though harvester and pharaoh ants are specifically excluded from this guarantee.

Q: Does Spectracide Triazicide need to be watered in?

Yes, Spectracide Triazicide granules must be watered in with 1/4 to 1/2 inch of water immediately after application to activate the insecticide. Keep children and pets off the treated area until the product has been watered in and the grass is completely dry.

Q: What insects does Spectracide Triazicide kill?

Spectracide Triazicide kills over 100 insect types including ants, crickets, armyworms, ticks, and grubs both above and below ground. The 0.05% Gamma-Cyhalothrin formula provides fast-acting contact kill plus extended control, though some users report inconsistent results on heavy tick infestations without repeat treatments.

Q: Is Spectracide Triazicide safe near water features?

Spectracide Triazicide is toxic to fish and aquatic life, requiring careful application to avoid runoff. New York State prohibits application within 100 feet of coastal marshes, and standard label precautions apply near any water bodies.