The treatment only works on juvenile grubs.Īdvice from Our Expert Q.In some areas, the soil temperature may not be at the ideal temperature during prime grub-feeding season. The soil temperature must be 65 degrees or above for the treatment to work.Grubs must ingest the bacteria and be infected by it. The treatment can take time before you see noticeable results.The Cons of Milky Spore TreatmentWhile milky spore treatment can be effective for Japanese beetle grub control, it has some downsides. Milky spore disease remains in the soil for years, so a repeat treatment isn't needed for several years. They have to ingest it-and it may be weeks, months or even a few years before you see noticeable results. Milky spore doesn't kill grubs instantly. If using a hose, make sure it is on the gentle setting.īe patient. You want the powder to soak into the soil and not wash away.
MILKY SPORE HOW TO
How To Apply Milky Spore DiseaseApply 1 teaspoon of milky spore powder every 4-feet in a grid pattern in your lawn. In most areas, the best time to apply milky spore is in late summer to early fall. When To Apply Milky Spore Disease?Because grubs must ingest the milky spore bacteria, milky spore powder should be applied when the grubs are most actively feeding-and when soil temperatures are 60-70 degrees F. Another sign may be birds, including robins and crows, and raccoons hunting and digging for Japanese beetle grubs in the lawn. The turf may also have a spongy feel to it. The Japanese beetle grubs feed on grass roots, causing the grass to brown and die.Ĭommon signs of grub infestation are dead patches of grass. Because they live in the soil, most people discover grub infestations by the damage that they do. What are grubs and how do I know I have them?Japanese beetle grubs are soft-bodied, c-shaped, off-white and up to 1 inch long. Read below to learn more about what is milky spore, milky spore treatment, how to apply milky spore powder and other tips for milky spore grub control. When grubs ingest the milky spore bacteria, they die from the infection. Milky spore, also called milky spore disease, is a naturally occurring organism in the soil. Grubs of Japanese beetles can wreak havoc on turf grass-and several natural control methods are available.
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