According to the manufacturer, Talstar cannot be used in horse pastures for any purpose.
Extinguish Plus Fire Ant Bait would be a better choice for you. Extinguish plus can be used on pasture land and there are no grazing restrictions for companion animals. Below you will see the grazing info available on the Extinguish Plus product label. Extinguish Plus combines the power of hydramethylnon with an insect growth regulator (IGR) to kill fire ant workers and prevent queens from laying fertile eggs. The result is complete fire ant colony control. Extinguish Plus Fire Ant Bait is best used in the spring or early fall, or whenever fire ants are active. The ants will feed off Extinuish Plus and spread the bait throughout the entire colony, halting the infestation within weeks. Extinguish Fire Ant Bait can be used indoors and outdoors on lawns, pasture land, rangeland, landscaped areas, and golf courses.
EXTINGUISH PLUS may be applied to grass forage
(pastures and rangeland) for the control of fire ants
only in the following states: Alabama, Arkansas,
Florida, Georgia, Louisiana, Mississippi, New
Mexico, North Carolina, Oklahoma, South Carolina,
Tennessee, Texas, and Virginia. Use on grass forage
(pastures and rangeland) in states other than those
listed is unlawful. See Outdoor Use table for
application directions. Do not exceed 8 pounds per
acre per year or more than 4 times a year, with a
minimum re-treatment interval of 90 days. 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. EXTINGUISH®
PLUS may be used on uncultivated, agricultural, nonfood
crop and non-agricultural land.
When using Talstar XTRA Granular Insecticide to treat for mole crickets, it’s very important to treat them at the correct time of the year. Controlling mole crickets soon after they hatch will offer the fastest knockdown of the current population and help avoid damage later in the year. Check areas in your lawn in the spring for damage cause by mole crickets. This is usually in places under and around trees, under and around bushes, around decks and patios, areas were leaf debris has collected, etc. Even though eggs hatch in the summer, damage will not become visible until the following spring, after the immature mole crickets have developed and grown. Applying your insecticide in the spring, can begin to treat those that are hatching in the summer. When treating for mole crickets, you should be using 2.3-4.6 pounds per 1000 sq ft. Be sure that you’re watering in your Talstar XTRA with at at least a half inch of water to ensure it’s moving past the surface of the soil and down into the top layer. The product label has specific instructions regarding mole crickets as follows:
Mole Cricket adults: Achieving acceptable control of adult mole crickets is difficult because preferred grass areas are subject to continuous invasion during the early spring by this extremely active stage. Applications should be made as late in the day as possible and should be watered in with up to 0.5 inches of water immediately after treatment. If the soil is not moist, then it is important to irrigate before application to bring the mole crickets closer to the soil surface where contact with the insecticide will be maximized. Grass areas that receive pressure from adult mole crickets should be treated at peak egg hatch to ensure optimum control of subsequent nymph populations (see below). Mole Cricket nymphs: Grass areas that received intense adult mole cricket pressure in the spring should be treated immediately prior to peak egg hatch. Optimal control is achieved at this time because young nymphs are more susceptible to insecticides and they are located near the soil surface where the insecticide is most concentrated. Control of larger, more damaging, nymphs later in the year may require both higher application rates and more frequent applications to maintain acceptable control. Applications should be made as late in the day as possible and should be watered in with up to 0.5 inches of water immediately after treatment. If the soil is not moist, then it is important to irrigate before application to bring the mole crickets closer to the soil surface where contact with the insecticide will be maximized.
