- Labeled for grass forage (pasture and rangeland)
- Relatively fast control
- Slower than Advion®
- Limited availability compared to other Amdro® fire ant baits products
- Requires low-volume spreader
Active Ingredient: 0.73% hydramethylnon
Similar Products: Any with hydramethylnon (Amdro®, Probait®, etc.)
Application Rate, Broadcast: 1 – 2 pounds per acre
Speed of Control: Relatively fast, 2 – 6 weeks
Duration of Control: 2 – 6 months, varies with reinvasion pressure; two applications per year are usually needed
Approximate product cost: $12 – $15 per pound, $12 – $24 per acre
Best used for: Relatively fast, relatively inexpensive control in commercial turf and grazed or hayed areas.
Best season for application: whenever ants are foraging for bait, but particularly effective in late summer and fall
Sources: Farm supply stores and pest control industry wholesalers, online
Toxicity: very low; may be toxic to animals if very large quantities are consumed
Agricultural Uses: May be applied to grass forage (pastures and rangeland) for the control of fire ants in Texas and other (refer to label) southern states. Use on grass forage (pastures and rangeland) in states other than those listed is unlawful. See Outdoor Use table on container label for application directions. Do not bale and cut treated pastures and rangelands for 7 days following application. These cutting and baling hay restrictions for pasture and rangeland do not apply when the treated pasture and rangeland is used solely to support COMPANION ANIMALS (e.g., horses, llamas, etc.). Companion animals grazed on treated areas cannot be used for food or feed. Amdro®Pro may be used on uncultivated, agricultural, non-food crop and non-agricultural land. Can be used in pineapples and bait stations for numerous tropical fruit and nut crops.
Mixing with other products: approved to mix with Extinguish®; will work to speed activity of other slow-acting products, but mixing is not supported by company. Do not mix with other products if prohibited on other labels.
General Comments: Amdro® Pro is a reliable, inexpensive product and one of only two baits labeled for use on grazed or hayed land. Other than Advion®, it is the fastest-acting treatment available. Some poor performance of the product has been noted in very hot, dry conditions.
Web site (label and MSDS links):
This site is intended to cover only broadcast-applied fire ant control products and slow acting fipronil containing granular products. Literally dozens of products are available as individual mound treatments. Contact your local Extension Agent or return to https://fireant.tamu.edu 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 A&M AgriLife Extension Service, 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.