Milky Spore Japanese Beetle And Other Beetle Killer 10 OZ, Concentrate, Milky Spore Grub Control, Covers 2,500 SQFT, 100% Organic, Safe To Use Around Children & Pets, Can Be Applied Whenever The Ground Is Not Frozen, Typically Late Spring Through Early Fall, Once Established, Milky Spore Will Last 15-20 Years.|Natural bacteria powder concentrate controls grub state of Japanese beetles. Remains dormant in soil until grubs begin feeding on grass roots to ingest it. Spore begins to multiply after ingested, killing grub from within. Will not harm humans, pets, shrubs, or beneficial insects. Use Milky Spore Grub Control applicator model No. 80001-7 (SKU 700070), any time ground is not frozen.