How to Get Rid of Japanese Beetles Sprays, Granules & Powders. There are several treatments you can implement for killing Japanese beetles, lessening possible damage, and keeping them away. We recommend using a pyrethroid insecticide or repellant such as Talstar P or a natural insecticide like Essentria IC3 to control adult Japanese beetles. How to Get Rid of Japanese Beetles If you have ornamentals or vegetables in your yard or garden then chances are you have experienced the wrath of the Japanese beetle. I distinctly remember growing up and going to a friends house to play. How to Get Rid of Japanese Beetles. There are many methods through which you can try to rid of the Japanese Beetles. While you can use pesticides that kill them instantly, I prefer natural and organic options. 1. Remove beetles by hand How to Get Rid of Japanese Beetles - Duration: 6:14. The University of Maine 258,715 views. 6:14. Homemade Garlic-Mint Garden Insect Spray that really works!! How to Get Rid of Japanese Beetles 1. Sevin Dust. Okay, let me say, I try to keep an organic garden. But truthfully, after losing my harvests a couple of years in a row because of Japanese Beetles, I have been known to throw in my organic towel and pull out the Sevin Dust. How to Get Rid of Japanese Beetles. It’s important to know your enemy. When it comes to roses, the Japanese beetle hasn’t been a threat for long. While they are native to Japan, most ecologists believe the beetles arrived in the United States around 1912 in a shipment of iris bulbs. How to Get Rid of Japanese Beetles. Good horticultural practices, including watering and fertilizing, will reduce the impact of the damage caused by these beetles, but oftentimes you simply need to get rid of them. Here are some ideas: Advice about how to get rid of Japanese Beetles wouldn’t be complete without addressing the issue of trapping Japanese Beetles. There are two kinds of Japanese Beetle traps: those that mimic the pheromones of the female Japanese Beetle and those that mimic the scents of foods that are favorable to Japanese Beetles. Known as “white grubs,” the recently hatched larvae of Japanese beetles grow in the soil for much of the winter. They hibernate during many of the cold months, too, diving further underground for warmer environments. Working Time: Varies depending on the size of the lawn or number of beetles. For severe infestations in a small garden, picking beetles by hand can require an hour or two a day for several weeks. Total Time: Effectively controlling Japanese beetles and their lawn grub larvae can require repeated efforts over an entire year. Material Cost: Lawn grub control granules cost about $40 for a 10.