'Todes aren't just for lawns anymore...
Stem borers in squash (inject them into the vine), black vine weevil (the best!)
And beetle grubs and mole crickets too.
Here's how to screw it up...
Call on a Thursday so the package gets held in an airport all weekend. Leave it on your counter for a day or two to get really warm. Dump it into chlorinated water that is either freezing or boiling, and then immediately apply it at high noon on the hottest day of the year, and don't water them in. They will die and fry and then the person who did all these things will tell you the nematodes didn't work for them
So do the opposite of everyting I told you there. Order early to ensure quick delivery, right in to the fridge but use them as quickly as possible. Mix with lukewarm water and apply at dusk or dawn, watering in preferably (they are very UV sensitive).
I was getting torn up by skunks (the sure fire sign of a bad infestation; everyone says "I have moles, so I must have grubs but all it means is you have worms. Skunks like grubs and can smell them like a pig smells truffles). I did a mixed treatment expensive, but certain 'tode have certain profiles. HB are hunter seekers that roam the soil, but SC are ambushers of the root zone. Sort of an anvil and hammer attack...
Have seen some this year in the beds, but with an organic lawn with root depth over a foot (can't do that with chemicals), they really aren't much of an issue anymore. But nematodes will whack them if they do act up...
HG