How to Get Rid of Armyworms in the Garden?

Are you noticing signs of an infestation of armyworms in your garden? If so, you’re not alone! Armyworms are a common pest that can wreak havoc on gardens and crops if left unchecked. Fortunately, there are several effective methods for getting rid of armyworms without harming your plants. In this article, we’ll explain how to identify armyworms, understand their life cycle, and intervene with mechanical, organic, and chemical control solutions to reduce and eliminate them from your garden.

Identifying Armyworms in the Garden

Armyworms can be a destructive pest in home gardens, and it’s important to identify them early before they cause too much damage. Armyworms are small green caterpillars that can grow up to 2 inches (5 cm) in length. They have a distinct line of stripes running along the sides of their bodies, which can help to easily identify them from other insect pests. Additionally, armyworms will chew through foliage of plants leaving behind jagged edges on the leaves.

In addition to eating leaves, armyworms will also feed on fruits and vegetables. They may start by consuming only the outer layer of the fruit or vegetable, but if left unchecked they could potentially eat through the entire produce item. If you notice your garden plants are being eaten rapidly and with jagged edges remaining on the foliage, then armyworms may be present in your garden.

Fortunately, there are steps you can take to get rid of armyworms in your garden and protect your plants from further damage.

Understanding the Life Cycle of Armyworms

Armyworms are the larvae of moths that feed on vegetation, and they can be a major problem in gardens. Understanding the life cycle of armyworms is key to successfully managing them.

Armyworm eggs are laid by adult moths in batches on foliage or other surfaces. When hatched, the larvae immediately search for food and begin feeding on whatever plant material is available. After several days of feeding, they enter a pupal stage and emerge as adult moths approximately two weeks later. The adults mate, lay their eggs, and the cycle starts over again.

Armyworms feed voraciously, often leaving behind bare stems or leaves with just veins remaining. To make matters worse, they often work in groups which makes it even easier for them to cause extensive damage quickly. If left unchecked, armyworms can defoliate entire plants or fields within a few days or weeks depending on the size of the infestation.

The best way to get rid of armyworms from your garden is to identify and monitor them regularly before they cause significant damage. If you spot any small green caterpillars at work in your garden, take action right away by either handpicking them off your plants or using insecticidal soaps or oils to kill them directly on contact. These methods may not completely eradicate an infestation but will help keep numbers under control until more permanent solutions can be implemented such as releasing beneficial insects like parasitic wasps into the garden that feed exclusively on armyworm larvae.

Intervening With Mechanical Control Methods

Armyworms can be a nightmare for gardeners, but there are a few mechanical control methods that can help. One of the most effective ways to get rid of them is by handpicking the larvae and adults from plants, while wearing protective gloves. This method works best when done regularly before an infestation becomes too large.

Another option is to use physical barriers such as row covers or insect-proof netting to protect your crops. You can also trim off parts of the plants where armyworms have been spotted or create traps using natural substances like beer or molasses. If you find larvae on the ground, you can scoop them up with a dustpan or vacuum cleaner and dispose of them away from your garden area.

Finally, introducing beneficial insects like praying mantises and lacewings into your garden can help control armyworm populations by preying on them and their eggs. You should also look out for birds that are attracted to these pests and let them feed in your garden area – they’ll be more than happy to help!

Organic Control Solutions to Reduce and Eliminate Armyworm Populations

Organic control solutions are an ideal way for gardeners to reduce and eliminate armyworm populations without the use of harsh chemicals. These methods include using natural predators, creating physical barriers, and utilizing beneficial insects.

One effective organic solution is to introduce natural predators to the garden environment. Birds such as wild turkeys, chickens, blue jays, cardinals and other insect-eating species can all aid in controlling or eliminating armyworms by eating them. Additionally, some predatory insects such as lacewings and ladybugs serve as a great form of biological control against armyworms. Gardeners should also consider introducing amphibians such as frogs or salamanders which may help keep the population under control by preying on smaller larvae of armyworms.

Using physical barriers is another organic approach that can be taken to manage armyworms in the garden. The simplest form of this involves placing a row cover (lightweight fabric) over the affected area of plants. This will block out sun and moisture where larvae are attempting to feed and pupate within the soil — ultimately leading to their death. Another form of physical barrier involves trapping adult moths with pheromone traps before they have a chance to lay eggs on your plants or nearby weeds that could become future hosts for armyworms.

Finally, another option for controlling armyworm populations is through the introduction of beneficial insects into your garden environment. Parasitic wasps sting larvae, injecting them with venom which kills them or renders them unable to feed. Trichogramma wasps are small parasitic wasps that lay their eggs inside the eggs of larger pests like armyworms — thus preventing them from hatching altogether! Companion planting can also be used; certain plants including yarrow, dill and spearmint act as natural repellents keeping away pests like moths that carry eggs for an infestation of armyworms in your garden area.

Using Chemical Control for Intensive Infestations of Armyworms in Gardens

Chemical control is a last resort for getting rid of armyworms in the garden. This type of control should only be used when all other methods to reduce and eliminate the population have failed. Chemical control is best used as part of an integrated pest management system, meaning that it should be used in conjunction with other methods like mechanical and organic control.

When using chemical controls, it is important to read and follow all safety instructions on the label, as these products can be toxic to both plants and humans. Additionally, before applying any chemical, it is important to identify which species of armyworm you are dealing with. Different species require different chemical treatments and the wrong chemical could be ineffective or cause more harm than good.

Broad-spectrum insecticides such as spinosad or pyrethrins will provide effective control against several species of armyworms. Bacillus thuringiensis (Bt) is also an effective choice for killing certain species of armyworms without harming beneficial insects like bees or ladybugs. It can take up to three weeks for these chemicals to take full effect on the larvae, so multiple applications may need to be done over a period of time in order to completely eradicate them from your garden.

Finally, if your infestation has become severe enough that chemical control must be used, it is important to note that most insecticides will kill beneficial insects too, so use sparingly and only when absolutely necessary.


In conclusion, armyworms can be a problematic pest in your garden. To help get rid of them, it is important to understand their life cycle and identify them in your garden. Mechanical solutions such as handpicking or covering plants with fabric can be used to reduce and eliminate armyworm populations. Organic solutions like applying beneficial nematodes or making garlic spray may also help reduce armyworm numbers. For intensive infestations, chemical control methods may be necessary in order to get rid of the pests. With the right approach, you can effectively keep armyworms out of your garden and protect your plants from damage.