...of something besides one's own germs.
I bought 50 million beneficial nematodes. 50 Million. Wow. Just so you know, 50 million nematodes can fit into a small yellow mailing envelope, with plenty of room left over for a sheet of instructions.
Tonight I sprayed 25 million of the buggers in my garden and yard. (Joe: "Hey, before you go spraying those outside, I want to greet each one personally.") Why? To eat the larvae of cutworms, maggots, japanese beetles, weevils, and other such pests. Not because they've been especially damaging to my tomatoes or other vegetables (they haven't, actually, at least not yet), but because if the larvae are gone, then the moles will go away and hunt for food elsewhere. And if the moles are gone, then my vegetables will be so much happier, and if my vegetables are happy, then I will have a bountiful crop to cook wonderful food with.
Now I just have to do something about those rabbits. Hasenpfeffer, anyone?