Try something called Milky Spore. It is a little expensive, but lasts about 15 to 20 years before you have to re-apply it. Get the powder not the granular. Powder needs to be applied only once around September. The granular needs to be applied 3 times during the application year. You front load the cost but are done. It is a bit of a pain to put down, but well worth! and it does not hurt anything except the targeted organisms. Kids, pets, us, fish, birds, worms, honeybees, etc. are not affected!!!! The milky spore gets into the ground, the Japanese Beetle grub eats it on the roots, the spores multiply and POOF the grub explodes releasing even more spores! We have done this with two properties with great results. The more grubs, the more spores. The best cycle I can think of. First year you will see a reduction of the beetles. The next year they should pretty much be gone. If you live in a community, you may be able to talk your neighbors into applying it to their land as well. Everyone benefits. Bonus - it also gets rid of June beetle and earwig grubs as well. Aaand, wait there's more. It helps get rid of varmints like moles, skunks, raccoons, etc (provided there is no other food source like the grubs). No grubs, no food. No food, no moles, skunks, etc. We get ours from St Gabriel Organics. We have no affiliation with St Gabriel's Organics. It's just a great product. They make the milky spore. You can buy it from a vendor, but they will just get it from St Gabriel's Organics. Some of the other vendors may be less expensive.
Hope this helps.
Julie,
Try something called Milky Spore. It is a little expensive, but lasts about 15 to 20 years before you have to re-apply it. Get the powder not the granular. Powder needs to be applied only once around September. The granular needs to be applied 3 times during the application year. You front load the cost but are done. It is a bit of a pain to put down, but well worth! and it does not hurt anything except the targeted organisms. Kids, pets, us, fish, birds, worms, honeybees, etc. are not affected!!!! The milky spore gets into the ground, the Japanese Beetle grub eats it on the roots, the spores multiply and POOF the grub explodes releasing even more spores! We have done this with two properties with great results. The more grubs, the more spores. The best cycle I can think of. First year you will see a reduction of the beetles. The next year they should pretty much be gone. If you live in a community, you may be able to talk your neighbors into applying it to their land as well. Everyone benefits. Bonus - it also gets rid of June beetle and earwig grubs as well. Aaand, wait there's more. It helps get rid of varmints like moles, skunks, raccoons, etc (provided there is no other food source like the grubs). No grubs, no food. No food, no moles, skunks, etc. We get ours from St Gabriel Organics. We have no affiliation with St Gabriel's Organics. It's just a great product. They make the milky spore. You can buy it from a vendor, but they will just get it from St Gabriel's Organics. Some of the other vendors may be less expensive.
Hope this helps.