Only where you spread them. There will still be grubs in your neighbors yard unless you all use it.

picked this up from an amazon review:

I was somehow thinking they were the larvae for cicadas. Squashed two so far while digging out a new bed I'm working on, and think I saw a number of eggs, but didn't think to squish those, darnit.

I thought they were (nasty as well) cutworms…

These little bastahds are worse than cicada's. They eat the roots of grass and the garden plantings. I am normally all peace and love and stuff — but these things are getting squashed when I find them.

and when I don't — they are gonna chow down on the milky spore.

I really hope this works. I had a tough enough time last year watching my cukes wither away. seeing them in my main garden ben, well that is bug too far.

Working on the new bed, I've actually been separating out the dirt from the grass above by hand, because so many of the worms seem to be right up in around the roots, so if I just skin the bed and pitch the grass roots, dirt and all, I'm losing a lot of worms I don't need to. That's how I've been finding the ones I have so far.

I had good growth especially with the cucumbers.

Then one plant (and then another…) started dying from the grown on up.

I realized the something killed the plants from the roots. I saw a grub or two last fall, and this spring I realized that I was infested. When I saw them in the main bed, I knew, I have a problem.

Save your worms! So far I have not seen a problem with a lack of them. *thank goodness**

I wasn't sure why. And I thought I was watering enough, but what few cukes I got wound up bitter.

I've got garlic in that seems to have overwintered well, and some potatoes in raised beds, and a few onions so far. Had to put up new fencing all around the patio, as it turns out the new beagle mix is an escape artist and could get over the old, so I'm thinking of putting something decorative that climbs along the new fencing. Can't do edibles that close to the house, I'm certain they scraped paint with lead off at some point in the past, since it's an older house, so nothing edible gets planted in the ground anywhere close in to the house. Got a lot of sunflowers coming up already too. The new bed will get the tomato seeds I got from one of our fellow DUers who literally 'wrote the book' on tomatoes. Oh, and that reminds me, I've still got some ornamental black cotton to plant along the back fence to provide nesting material for birds.

I feel there is a definitely decline in the amount of Japanese beetles. It takes several years to really see the decrease, but it was worth it in my opinion.