Amdro® Ant Block™

Amdro Ant BlockAdvantages:

  • Amended formula to make it more attractive to many ant species
  • Inexpensive when applied as a band
  • Relatively fast control
  • No spreader needed
  • Multiple ant species on label


  • Will control ants only within a few feet of where applied

Active Ingredient: 0.88% hydramethylnon

Similar Products: Any with hydramethylnon (Amdro, Amdro Pro, Pro etc.)

Application Rate, Broadcast: 4 oz. per 180 linear feet in 1-foot band

Speed of Control: relatively fast, 2-6 weeks

Duration of Control: varies with reinvasion pressure

Approximate Cost: depends on perimeter of structure

Best used for: Homeowner application around structures

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

Sources: Retail outlets, garden centers and agricultural suppliers

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), corrals and other animal holding area.  For other agriculture uses see the Extinguish® Plus product.

Mixing with other products: Not advisable

General Comments: This product was developed for the consumer market to help prevent ant invasion of structures and has a unique band application method. The product provides no true residual control, but should eliminate colonies within foraging distance of the bait band (estimated up to 30 feet).

Manufacturer: Ambrands/Central Garden and Pet

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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