I noticed milky spore has been brought up but wanted to bring up nematodes as well as discussed on this website. Its important to follow instructions for application as well.
Milky Spore Granular Grub Control
" Combine Milky Spore With Beneficial Nematodes To Maximize Japanese Beetle Grub Control!
Milky Spore contains spores of the bacteria Paenibacillus popilliae (formerly Bacillus popillae ), which work specifically against the grub stage of the Japanese beetle ( Popilia japonica ). It poses no threat to people, animals, plants or beneficial insects. When Milky Spore is introduced into the soil, it will lie dormant until grubs begin feeding on roots where the bacteria is present. Once ingested, the spore multiplies inside the grub with a single spore creating up to 3 billion new spores in each host grub. These spores kill Japanese Beetle grubs in about a week after infection. As the grub decomposes, the billions of spores it contained are released back into the soil to start the whole process again. Over time, Milky Spore fills out the soil creating a soil environment that Japanese beetles simply cannot survive in.
Milky Spore’s effectiveness can be enhanced by the use of NemaSeekbeneficial nematodes. They are unharmed by the infective bacteria and help spread it as the nematode moves through the soil pursuing grubs, weevils and larvae. Apply Milky Spore dry, then water in the NemaSeek for complementary control of grubs.
Coverage Rate: A 20 lb. bag of Milky Spore Granules treats up to 7,000 sq. ft."
I also want to point out the figeater in some areas may be misindentified as the green june beetle Cotinis nitida or japanese beetle Figeater beetle - Wikipedia
Cotinis nitida - Wikipedia
Japanese beetle - Wikipedia
This link further discusses the green june beetle life cycle https://luv2garden.com/june_bugs.html
The application rate of nematodes and target species can be seen here NemaSeek Beneficial Nematodes - Heterorhabditis bacteriophora
" NemaSeek Beneficial Nematodes, Heterorhabditis bacteriophora , actively seek out pest insects in the soil. Beneficial Nematodes are live microscopic organisms (non-segmented round worms) that naturally occur in soil throughout the world. The beneficial nematodes we sell are parasitic to insect pests that typically have a developing (larval or pupal) stage of life in the soil. They have been known to parasitize above ground stages of adults, nymphs and larvae. They will not harm mammals, aquatic life, birds, reptiles or amphibians. After being applied to the soil, the nematodes locate pests and enter through various body openings or directly through the body wall. Once inside, the nematodes produce bacteria that is injected into the pest’s blood.
Beneficial Nematodes release the bacteria in order to create food and a proper environment for their own reproduction. As the food resources within the dead pest become scarce, the nematodes exit and immediately begin searching for a new host. As long as there are suitable hosts, nematodes will continue to survive and parasitize in the soil.
Shelf Life: Up to 2 weeks (refrigerated and unopened in original container).
How Much Do I Need? Order enough to treat the full infested area. Quantities and treatment areas are approximate.
| Quantity | Treatment Area | Shipping Method |
|---|---|---|
| 5 million | 1,600 sq. ft. | 2nd Day |
| 10 million | 3,200 sq. ft. | 2nd Day |
| 50 million | 1 Acre | 2nd Day |
| 250 million | 5 Acres | Next Day |
| 500 million | 10 Acres | Next Day |
This Product Controls These Pests or Diseases: Ants (Queen), Asparagus Beetle ( Crioceris asparagi; Crioceris duodecimpunctata ), Banana Moth, Banana Weevil, Berry Root Weevil, Billbug, Black Vine Weevil, Borers (Iris Borer, Tree, Vine), Carrot Weevil ( Listronotus oregonensis ), Chafers(European, Masked), Citrus Root Weevil, Colorado Potato Beetle ( Leptinotarsa decemlineata ), Corn Rootworm, Cranberry Root Weevil, Cucumber Beetle(Spotted) ( Diabrotica undecimpunctata howardi ), Flea Beetles, Gall Midges, Grape Root Borer, Grubs, Humpbacked Flies/Phorid Flies, Japanese Beetle( Popillia japonica Newman ), Leafminers, May/June Bugs ( Phyllophaga sp. ), Root Weevils, Scarabs, Sugarcane Stalk Borer, Sweet Potato Weevil, Ticks" . I also highly recommend everyone consider the methods @scottfsmith uses since some smart alternatives to chemicals are discussed in detail at this link Low-Impact Spray Schedule (2019 Edition)