Home Remedy for Japanese Beetles: 9 Natural Methods

Japanese beetles can be a real nuisance in your garden, but don't worry, there are some effective home remedies to help control their population.

One of the simplest methods is to use neem oil, which can be applied directly to the beetles or sprayed on the plants to repel them. This oil is extracted from the seeds of the neem tree and is a natural insecticide.

In addition to neem oil, you can also try using insecticidal soap, which is another gentle yet effective way to control Japanese beetles. This soap works by breaking down the insect's exoskeleton and dehydrating it.

A more physical approach is to use sticky traps or pitfall traps to capture and dispose of the beetles.

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To control Japanese beetle infestation, you can try natural control methods. Fill a jar or bucket with soapy water an inch or so deep, and head out to your home garden or orchard to handpick the beetles and drop them into the soapy water.

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For Japanese beetles, do this during daylight hours when their metallic green color makes them easier to spot. For Chinese rose beetles, try this just after nightfall when they're most active.

If you're hesitant to use pesticides, there are usually some natural alternatives to try first. Natural remedies are great for the environment, but they may not work as effectively as pesticides.

You can also use diatomaceous earth, a powder made from tiny, crystal-like fossils that can rip the waxy outer shell of insects. This powder is extremely effective because insects can't develop resistance to its sharp edges, and it acts as a drying agent that can kill beetles in as little as 24 hours.

To apply diatomaceous earth, put on a pair of latex gloves to prevent your skin from drying, and spread the powder on all plants and shrubbery using a dust applicator.

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Diatomaceous Earth is one of the best methods to use for treating a wide area in your yard. According to the National Pesticide Information Center, DE powder is made from tiny, crystal-like fossils called diatoms.

These fossilized shells are made of silica that has microscopic, razor-sharp edges that can rip the waxy outer shell of insects. Insects can’t develop resistance to the sharp edges of the shells, so diatomaceous earth is extremely effective.

DE powder also acts as a drying agent when insects walk through it. Once the powder attaches to a beetle’s body, the insect dies from dehydration in as little as 24 hours.

To apply DE powder, put on a pair of latex gloves to prevent your skin from drying, and spread the powder on all plants and shrubbery. Use a dust applicator to avoid clumping so the beetles won’t just fly around it.

Food-grade Diatomaceous Earth is generally safe around pets or children. But it is always a good idea to check their activity when outside near the powder.

DE powder is evergreen as a residual — even if the product gets wet. It will work again once it dries out as long as it isn’t washed away.

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Using geraniums as a natural pest repellent is a simple and effective way to control Japanese beetles. This method is supported by the U.S. Department of Agriculture, which reports that geranium petals can paralyze Japanese beetles within 30 minutes.

Plant geraniums close to the plants you want to protect, and you'll be amazed at how well they work. The beetles will roll over on their backs, become paralyzed for several hours, and often succumb to death after being devoured by predators.

Geraniums are a natural way to keep Japanese beetles from destroying your plants, and they're easy to incorporate into your garden.

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Using trap crops is a great way to manage Japanese beetles by attracting them away from your desired plants. Recommended trap crops include marigolds, borage, white geraniums, grapevines, evening primroses, and zinnias.

Planting trap crops at the edge of your garden can help maximize their effectiveness. Regularly monitor the plants for beetles and use methods like hand-picking or insecticidal soap for control.

Japanese beetle traps can be a last resort, but be aware that they attract more than just the beetles in your garden. In fact, they can attract about four times as many beetles as would normally be in your yard.

Using Japanese beetle traps can end up being more of a problem than a solution, so consider them only as a last resort.

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Making a spray to deter Japanese beetles is a simple and effective solution. Mix a quart of water with a teaspoon of dish soap to create a soapy solution that can suffocate the beetles.

This homemade spray is easy to make and can be applied directly to affected plants. The soapy water can cause the beetles to drop from the plant and become food for predators like birds.

For a more targeted approach, you can try using neem oil. Neem oil is a natural pesticide that interferes with the hormone system in insects, making it difficult for them to reproduce.

To use neem oil, spray it on your plants every week or two, and you should notice a significant reduction in Japanese beetles. However, keep in mind that the beetles may move to other foliage in your yard if not covered with the oil.

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Physical removal is a simple and effective way to get rid of Japanese beetles. You can pick them off plants by hand, a method that's both easy and humane.

The University of Missouri Integrated Pet Management program advises that application of insecticides should be considered the last resort, and farmers/gardeners should select the lowest risk and most effective products.

To handpick Japanese beetles, wear thin gardening gloves and pluck them from grass and other plant life, being careful not to squeeze or crush them. Dispose of them by dropping them in a bucket of soapy water (2 tablespoons of liquid dish soap per 1 gallon of water).

Handpicking Japanese beetles is most effective in the early morning, when they're most active. Spraying your entire lawn with a soapy mixture of 2 tablespoons dish soap to 1 gallon of water will help force Japanese beetle larvae to the surface, attracting hungry birds.

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Here's a simple guide to handpicking Japanese beetles:

Handpicking Japanese beetles from your lawn or garden is the most effective approach to controlling these pests. It can take some time, but the effect it can have on the health of your plants is well worth the effort.

For best results, do this in the early morning, when Japanese beetles are most active. This is when they're most likely to be found on grass and other plant life.

Using gloves, pluck the beetles from grass and other plant life being careful not to squeeze or crush them (doing so could attract more beetles). Dispose of them by dropping them in a bucket of soapy water (2 tablespoons of liquid dish soap per 1 gallon of water).

Spraying your entire lawn with a soapy mixture of 2 tablespoons dish soap to 1 gallon of water will help force Japanese beetle larvae to the surface, which in turn will attract hungry birds. This should be done in fall and late spring, when Japanese beetles are in the larval stage of their life cycle.

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Here's a simple guide to follow:

Prune rose buds and treat rose bushes before they bloom to prevent Japanese beetles from decimating your prized rose bushes. This can be done by pruning any rose buds and treating bushes before they bloom, which may help make sure any beetles hanging around will be gone before the flowers flush again.

Pruning the roses back a bit further than normal after the season's first flush can help prevent beetles from becoming a problem. This will give you a chance to remove any remaining beetles by hand.

Covering your rose bushes with mesh plant netting can also prevent lingering grubs from becoming adults. You can find mesh plant netting at most gardening stores.

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Biological control is a great way to tackle Japanese beetles without harming the environment. Introducing parasitic roundworms, also known as beneficial nematodes, into the soil can be a game-changer.

These microscopic worms can locate and enter a host, releasing a bacteria that's deadly to young beetles. The nematode species Heterorhabditis is said to be most effective against Japanese beetles.

For best results, apply nematodes in late August or early September to attack the next cycle of beetles for the following year. You can also add them to the soil at any time, as long as the soil is sufficiently watered.

Beneficial nematodes are easy to use and can be found at your local home and garden store. Simply open the package, dump the nematodes into a bucket of water or inside of a garden sprayer, and let them soak for one minute.

The nematodes need moisture to survive, so apply them after it rains or make sure you irrigate the soil before releasing them. Be sure to use them within 30 days of purchase and check the expiration date on the package to ensure freshness.

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Japanese beetles may seem harmless, but they can still wreak havoc on your plants and trees.

Removing them by hand is a simple yet effective way to get rid of them.

Using a homemade soap-and-water solution can suffocate them, making it a great alternative to chemical pesticides.

Spraying affected plants with neem oil is another tried-and-true method to control Japanese beetle populations.

Being proactive is key to preventing infestations, so avoid grouping susceptible plants together.

Keeping rose buds pruned can also help reduce the risk of Japanese beetles targeting them.

Introducing parasitic nematodes to your landscape can help control Japanese beetle grubs, which are a major contributor to infestations.

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