Mark from Plainfield, Il writes
For Milky Spore Powder to work, live grubs have to ingest it. For long term treatments, we would recommend using Milky Spore Powder. This is a slower acting product, but it will last about 15-20 years in the soil after one application. It is a one time application put down in spots in measuring teaspoon amounts every four feet apart creating a checkerboard pattern of spots throughout your yard. Each spot contains 100 million spores. Right now the grubs are not actively feeding and going deeper into the soil.
Answer last updated on: 10/26/2015