White grubs in lawn

Asked June 11, 2018, 10:30 PM EDT

We used to have a beautiful lawn, but we had quite a bit of lawn damage two years ago and had parts of our lawn reseeded. It didn’t grow well, and last year it was determined, when some of our turf was lifted up, that we have a serious grub problem. We had quite a bit of the lawn replaced with sod, but still have some of the original lawn. We put down milky spore late last summer. We just put done another application and plan to do two more this year, one mid summer and one the end of July or beginning of August. We know we have to continue this for a couple of years. It’s hard to be patient. What is your opinion about using milky spore vs. GrubEx to treat the white grubs in our lawn?

Baltimore County Maryland

3 Responses

We recommend using Grub-Ex if you have a problem with grubs. Milky spore has not been found to be very effective in our area.

We wonder though if you truly do have a problem though, or if something else could be going on. Turf-type tall fescue is the recommended lawn grass in Maryland, and it rarely has great problems with grubs. In fact, the only way to know if you have a grub problem is to dig up a square foot area and count.
In a tall fescue lawn, you wouldn't be concerned unless you found about a dozen within the square foot.
Here is our page on grubs: http://extension.umd.edu/hgic/grubs-lawns


Yes, we dug up a square foot in more than one place, and each was crawling with grubs...many more than a dozen. Not a pretty sight.

Sounds like you should apply the Grubex then. You can apply it from May-September. So the time is right.