Grubs are a bit tough to solve. The cheap solutions is to use grub-ex or another insecticide. But it is a short lived solution because more grubs (from the neighbors yard) soon move in(after the poison breaks down or is washed away). The other concern with insecticides is having kids or pets in the yard. (Yes, I know the US govt tells us that they are safe, but I am a bit of a skeptic)
I also have children and finally decided to use "Milky Spore"
here is a link http://www.yardlover.com/milky-spore-grub-control
Milky spore is a bacteria which attacks (infects) the grubs. IT will NOT infect humans or pets. The beauty is that it last several seasons. The worse the problem at first, the better it works because the bacteria (milky spore) reproduce by killing off the grubs. After the grubs are killed the bacteria revert to spores (like the ones you bought) to wait for more grubs.
The main draw back is that it wasn't quite as fast to apply and that is doesn't work quite as fast. But it does work.
I bought mine at Lowes in the garden section. (I am also a biology teacher by trade)
Good luck
I also have children and finally decided to use "Milky Spore"
here is a link http://www.yardlover.com/milky-spore-grub-control
Milky spore is a bacteria which attacks (infects) the grubs. IT will NOT infect humans or pets. The beauty is that it last several seasons. The worse the problem at first, the better it works because the bacteria (milky spore) reproduce by killing off the grubs. After the grubs are killed the bacteria revert to spores (like the ones you bought) to wait for more grubs.
The main draw back is that it wasn't quite as fast to apply and that is doesn't work quite as fast. But it does work.
I bought mine at Lowes in the garden section. (I am also a biology teacher by trade)
Good luck