I went through this last year, and I kept notes. Complications for me were (1) I have no state license to buy many of the choices, (2) I needed something safe for horses when grazing, and (3) I really wanted something safe for bees. Most al the choices had a restricted entry interval (REI), a pre-harvest interval (PHI), a grazing restriction, of were fatal to bees.
The 2 choices which did not require a license to buy in my state were spinosad (Tracer, Blackhawk) and methoxyfenozide (Intrepid 2F). Spinosad is toxic to bees, and methoxyfenozide is not, so that is what I was left with.
Intrepid 2F is an insect growth regulator (IGR) . A gallon (22.6% concentration) from www.pestrong.com was around $300. Same price on all other sites I checked. It does not affect pollinators. The amry worms ingest the IGR, cease to eat, and die. Application rate is 4 to 8 ounces per acre, so I have a lot left from my gallon.
Pest control guys in my area use Sevin. If I could have ordered it myself I would have needed to spend $145 to $290 for enough for my farm. It has a 14 day grazing restriction, is a cholinesterase inhibitor, and is toxic. You should have some atropine injectable available as an antidote, just in case.
FYI, the options are carbaryl (Sevin), methoxyfenozide (Intrepid), chlorantraniliprole (Prevathon). cyfluthrin (Baythroid), spinosad (Tracer, Blackhawk), methomyl (Lannate) and zeta cypermethrin (Mustang Max).
The recommended way to check for army worms is with a sweep net, like used for butterfly collecting). Sweep net across grass each step across a pasture for a minuimum of 30 steps (sweeps). Then turn out the contents and look for army worms. If any are found in the sweep material, go back and check a measured square foot. If 2 or more army worms are found in a square foot, the acreage should be treated. This is an army worm. They are about 1-1/2 inches long.
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The 2 choices which did not require a license to buy in my state were spinosad (Tracer, Blackhawk) and methoxyfenozide (Intrepid 2F). Spinosad is toxic to bees, and methoxyfenozide is not, so that is what I was left with.
Intrepid 2F is an insect growth regulator (IGR) . A gallon (22.6% concentration) from www.pestrong.com was around $300. Same price on all other sites I checked. It does not affect pollinators. The amry worms ingest the IGR, cease to eat, and die. Application rate is 4 to 8 ounces per acre, so I have a lot left from my gallon.
Pest control guys in my area use Sevin. If I could have ordered it myself I would have needed to spend $145 to $290 for enough for my farm. It has a 14 day grazing restriction, is a cholinesterase inhibitor, and is toxic. You should have some atropine injectable available as an antidote, just in case.
FYI, the options are carbaryl (Sevin), methoxyfenozide (Intrepid), chlorantraniliprole (Prevathon). cyfluthrin (Baythroid), spinosad (Tracer, Blackhawk), methomyl (Lannate) and zeta cypermethrin (Mustang Max).
The recommended way to check for army worms is with a sweep net, like used for butterfly collecting). Sweep net across grass each step across a pasture for a minuimum of 30 steps (sweeps). Then turn out the contents and look for army worms. If any are found in the sweep material, go back and check a measured square foot. If 2 or more army worms are found in a square foot, the acreage should be treated. This is an army worm. They are about 1-1/2 inches long.
