I need help with the timing of when to apply nematodes to attack grub worm larvae. I read elsewhere that July and August is the ideal time to apply for the Gulf Coast region of Texas. But, is the life cycle of these beetles such that I could still apply nematodes in early November...I still see larvae. I'm guessing that Milky spore can be applied anytime and I want to put out both, but I don't want to waste the $20 on the nematodes if I am too late.

I have the only organic lawn on the block and this visable damage to my lawn is quite embarrassing. Why did they pick me?!?

Well I am late to answer but not too late to save you the money. Any time after August is too late to apply. Why? Because the grubs have stopped feeding. You can still kill them but at that point, why bother? The time to apply is the first day you see June bugs swarming your porch lights. When you apply, start your normal (1 inch) irrigation. Stop after about a quarter of the water has been applied, apply the nematodes, then finish watering. Nematodes only move on a film of water, so spraying into dryish soil is a waste.

Grubs rarely attack the same lawn two years in a row. Wait until you see the June bugs.

Thanks, David. Your timing is still pretty darn good because I was going to go out there tomorrow and apply the half of a jar I have left in my refrigerator...which brings up the question: "How long can you store nematodes?

They last about 2 weeks when refrigerated. You may as well apply them. There is some benefit to applying now, just not grub control. Now is the time to control fleas, ticks, and thrips. BN is the only way to control thrips and ticks and NOW is the only time of year.