Top 6 Best Insecticides For Japanese Beetles (2020 Review)

Designed for killing subterranean termites, Dominion 2L is an excellent pesticide for drench treatments to kill adult Japanese Beetles and their larvae. It has a long-term residual impact, up to a year in length. It is only intended for outside use.

Each 27.5-oz bottle will make 50 gallons of the finished product. Mix it in 5-gallon buckets at a rate of 0.6ounces of concentrate to a gallon of water. Agitate it vigorously for 2-3 minutes then pour it on the infested areas where the larvae are attacking the turf.

Use the same mix ratio in a 4-gallon backpack to spray across the top of the grass, landscape ornamentals, and fruit and nut trees. This will kill the adult Japanese Beetles as well as many other insects. Keep pets and children away until it dries.

This pesticide was designed to kill pyrethroid-resistant bugs, although the second active ingredient, Metofluthrin, is a pyrethroid. The final active, Piperonyl Butoxide, is a synergist that makes the other two active more effective at killing bugs.

The combination creates a fast knockdown to kill adult Japanese Beetles. The residual impact begins working almost immediately as well. It is highly effective but each bottle only makes one gallon of finished product making it the most expensive one on our list.

It has a strong odor and the fumes have caused headaches in some people. Wearing a mask is strongly recommended. Pets and children should be kept out of the treated area for about 24 hours.

One application of these granules in the late spring or early summer will give you four months of control of Japanese Beetles in their white grub stage, killing them before they damage the turf in your yard. You’ll need a hand spreader to broadcast the granules.

One 28.7-pound bag of granules will treat 10,000 square feet. If you’re treating that much area, a push spreader may be worth the purchase price.

After spreading the granules, they need to be watered in so they’ll soak into the soil.

Keep pets and children out of the area until it has dried. If you’re not completely satisfied with the results, Scotts offers a money-back guarantee.

Originally created to kill termites, this 32-oz bottle of Permethrin will make 16 gallons of the finished product. Permethrin is a pyrethroid, a synthetic version of natural chemicals called pyrethrins, which are found in chrysanthemum flowers.

These chemicals work by attacking the nerve functions in target insects, causing paralysis, leading to death. Due to their low cost and effective nature, there are several thousand brand-name pesticides on the market using various pyrethroids.

Permethrin SFR has a strong odor so you should wear a face mask while mixing it. Mix it in 5-gallon buckets to create a drench treatment for pouring on infested areas of your lawn, then keep children and pets away until it is completely dry.

Each treatment will last about two weeks against Japanese Beetles, then repeat the application until no more beetles are seen. This is a cost-effective treatment plan.

This is a broad-spectrum insecticide that kills adult Japanese Beetles and their larvae as well as many other destructive pests.

One 12-oz bottle makes 50 gallons of the finished product. It is effective as a surface spray or as a drench treatment.

However, the active ingredient, Dinotefuranm, is highly water-soluble and mobile.

It also resists biodegradation, creating a strong potential for it to migrate into shallow water tables and cause contamination, especially where the soil is permeable.

Exercise caution when using this product as a drench treatment. If you’re not sure about the water table in your area, and can’t afford to pay for a professional survey, stick to using it as a surface spray to kill the adult Japanese Beetles.