Amdro Yard Treatment


  • Relatively fast control
  • Can be applied with fertilizer spreader
  • Widely available in retail stores
  • May be used around companion animals, e.g., horses


  • Slower than Advion or Spectracide Once and Done
  • No pasture label (versus AmdroPro + Extinguish hopper blend)
  • Large volume needed for large areas
  • Expensive compared to low-volume baits

Active Ingredient: 0.036% hydramethylnon

Similar Products: any with hydramethylnon (Amdro, Maxforce, etc.); Spectracide Once and Done for high volume application

Application Rate, Broadcast: 5 lbs per 5,000 to 10,000 square feet

Speed of Control: relatively fast, 2 – 6 weeks

Duration of Control: usually requires two applications per year, varies with reinvasion pressure

Approximate Cost: ~ $20 per 5 lb bag (5,000 – 10,000sq ft) or $170 – $340 per acre

Best used for: Homeowner application with fertilizer spreader where cost is not a concern

Best season for application: Whenever ants are foraging for food, particularly effective in late summer and fall

Sources: widely available in retail stores and garden centers

Toxicity: very low; may be toxic to animals if very large quantities are consumed

Agricultural Uses: On grounds surrounding poultry houses (excluding runs and ranges) or corrals and other animal holding areas which may be fenced pastures and rangeland used solely to support companion animals (e.g., horses) not used for food or feed.

Mixing with other products: Not advisable

General Comments: This product was developed for the consumer market to address the use of push-type fertilizer applicators. Large application volume is also more acceptable to the homeowner. Test results indicate that 80 – 90% control is the norm, somewhat less than low-volume hydramethylnon products. Cost is four to five times that of low-volume products.  Not recommended for single mound treatments.

Manufacturer: Ambrands

Web site (including label and MSDS):


This site is intended to cover only broadcast-applied fire ant control products. Literally dozens of products are available as individual mound treatments. Contact your local Extension Agent or return to for more information on individual mound treatments.

Because of the constantly changing availability of fire ant insecticides, it is virtually impossible to include every product on the market. Mention of a product on this site does not imply an endorsement by Texas Cooperative Extension, the Southern Region IPM Center or any cooperating state. Lack of mention does not imply that the product is not an effective fire ant control product.

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