Nematodes

50 million of the microscopic blighters arrived by post today and are now safely ensconced in my fridge, waiting for when I've got time to mix them with water and spread them onto my lawn. I've got a leatherjacket infestation - that's the grub that grows into daddy-long-legses - which are eating my grass.

50 million! In one box!

Mind you, you can't see them, they look like sawdust, so I've actually no guarantee that they aren't sawdust!