I am a homeowner that has about 40,000 sq. ft of lawn. While putting in flowers in the ground, I noticed lots and lots of grubs. Last year, my lawn did have a few brown spots - probably from grubs. This year already, I have some spots that are getting brown. I live in Ohio and we've had lots of rain the last 2 months. My question: Whats the best grub control for the money? Scotts Grubex is $19 a bag and only covers 5,000 sq ft. Any generic brands that work well for much less money? Or, is there an insect control fertilizer that also kills grubs?