The Best Insecticide For Armyworms (Top 5 Picks)

They’re not called Armyworms for nothing. These insects can take over your garden, years, or indoors and ambush your plants like an army.


To get rid of them, the best option is to use insecticides, and in this article, I’ll share the best recommendations that worked for us.

Here’s a list of the top 5 insecticides to get rid of Armyworms:

Monterey Thuringiensis Worm Killer Insecticide

The Monterey B.T. Insecticide is an environmentally friendly way to control armyworms and caterpillars.

It kills insects that feed on the leaves of your plants without harming beneficial insects such as birds. It can be applied to both ornamental plants and fruits. However, you shouldn’t use this product on edible plants. This pesticide can cause severe damage to your crops.

This insecticide is applied to the leaves of your vegetables. Its effectiveness depends on when the worms or caterpillars ingest it. After ingestion, the insecticide will prevent them from feeding and killing your crop. You can use Monterey B.T. as early as two weeks before harvest, but if you are dealing with an infestation of worms, you can use it up to the day of harvest.

Using Monterey B.T. on your crops is a good idea because it kills worms and caterpillars. This natural insecticide is safe for birds and earthworms, and it is also approved for organic gardening. It is also a great option if you have a large infestation of worms in your yard. It is an eco-friendly way to protect your plants from harmful pests.

Monterey B.T. is a Biological Insecticide. It is best applied to plants when worms first appear. Repeat applications at five- to seven-day intervals to prevent a recurring problem. Heavy infestations will require more frequent applications. It is important to apply Monterey B.t. to the leaves. The product must be eaten by the worms or caterpillars in order to be effective.

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Scotts GrubEx 1 Season Long Grub Killer Review

The Scotts GrubEx 1 Season Long Grass & Garden Grub Killer is an ideal way to prevent grub damage to your garden throughout the growing season. Applying this product in early spring or late summer can keep a grub infestation under control all season long. Moreover, the Scotts spreaders make applications easy and convenient. It has a high concentration of pyrethroid, a natural insecticide that is effective in controlling Japanese beetles.

The Scotts GrubEx 1 Season Long Grubbing Killer is a 10 M. liquid that can be applied to your garden in spring and early summer. The product is also effective at preventing Japanese beetle infestations and controlling grubs. In addition, it can be applied using a broadcast drop handheld spreader. Lastly, the product is easy to apply and is EPA-registered.

The active ingredient in Scotts GrubbEx is chlorantraniliprole (0.08%). Although the EPA recommends using the product once a year, the product will work all season.

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The grub killer will kill grubs and their eggs, and it will remain in the soil through mid-summer. Unlike other grub-killing products, this one needs to be applied sooner in the growing season.

Spectracide Acre Plus Triazicide Insect Killer Granules

Spectracide Acre Plus Triazicide Insect Killer is a granular insecticide designed to kill large ants insects in your lawn. It can destabilize any infestation of armyworms.

It kills ants and other insects on contact. The granules are easy to apply and should be watered in once the product is applied. For best results, apply the granules in late summer or early fall.

This fast-acting formulation provides effective protection against more than 100 types of pests, including ants, moles, and spider mites. The granules work to kill insects both above and below ground.

Designed for lawns, and gardens, the granules are easy to apply with a broadcast spreader or by hand. It is easy to apply, and it can treat a 44,000-square-foot area. Depending on the area, Spectracide Acre Plus Triazicide Insect Killer can also be used as a barrier band around a home.

Spectracide Triazicide Acre Plus Insect Killer is a great product for protecting your lawn from insect invasion. It’s fast-acting and safe for pets and children and will help you tame invaders and protect your landscape from damage. Spectracide Acre Plus Triazicide Insect Killer for Lawns Granules can be applied directly to lawns and can protect up to 44,000 square feet. Once applied, it can be watered in and will keep the bugs away for up to 12 months.

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Ortho Home Defense Insect Killer For Lawn

ORTHO Home Defense is an effective insecticide that works indoors and outdoors. Not only does it kill outdoor bugs, but it keeps them from invading your home. This product is safe for use indoors and out of the house. However, be sure to follow the directions on the container. It should not be sprayed near the house or in a neighbor’s yard. You should also treat the entire lawn every three months to ensure that it is effective.

This insecticide is effective for killing bugs on the exterior of your house. Once sprayed, it will form a barrier that prevents them from getting inside. Unlike other insecticides, it kills bugs on the spot and gives you three months of protection. Unlike some other insecticides, it is safe to use on hard surfaces. You should use it at the first sign of insect activity in your yard.

If you want to keep out bugs on your lawn, use Ortho Home Defense Insect Killer for your lawn. This product is safe for use in homes and businesses. You should read the label carefully before using it on your property. It contains ingredients that kill ants, fleas, and spiders. Insecticides should be applied to the lawn once or twice a week or every few days.

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Ortho BugClear Insect Killer For Lawns and Ornaments

Ortho BugClear Insect Killers are ready-to-spray insecticides that kill all of the insects on its list. The nonstaining and odor-free formulation begins killing immediately and gives you long-lasting control. Whether you have a lawn or garden, you will be happy to know that Ortho BugClear Insectkillers have a long-lasting effect.

This insecticide kills all insects on contact and works below and above ground to create a bug barrier. It provides six months of residual protection for ants and other pests and is safe for plants. Use the Scotts spreader to apply the product to your lawn. Each 10-pound bag treats up to 16,500 square feet. Its effectiveness is proven to last for three months.

Ortho BugClear Lawn Insect Killer is designed to control outdoor insects and prevent them from coming indoors. It kills all listed insects through contact and is odorless. It can be applied by hand or with an Ortho Dial N’ Spray. It also creates a three-month barrier against insect infestation. This effective insecticide will be effective for lawns, gardens, ornamentals, fruit trees, and vegetables.

Ortho BugClear Insect Killers are fast-acting and effective. The spray can kill all listed insects. It does not stain or leave a foul odor. The pesticide is non-staining and odor-free and will start killing the bugs in minutes. The spray is designed to provide long-lasting control for up to 6 months. So, don’t wait for the bugs to invade your yard!


Discover the ultimate solution to combat armyworms in your garden with our comprehensive guide. Learn about the best insecticides and effective strategies to protect your plants. Arm yourself with knowledge and safeguard your garden from these voracious pests. Visit PlantGardener to arm yourself against armyworm invasions and ensure a thriving garden.

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