Posted: 02/09/2013 at 23:12
It is a liquid which you dilute. There is information about neonicotinoids like these at the Soil Association site:
These chemicals are taken up by the plants and can end up in the nectar and pollen. While I'm yet to be convinced about the effects on bees (and us of course, if we use these chemicals on fruit & veg which the instructions say not to do), I would sooner play safe than sorry. The nematodes are safe for use on food crops and cost only a tiny bit more than the Provado.