Diatomaceous earth: The sharp surfaces cut through the insect cuticle and the insect dies of dehydration. Diatomaceous earth kills slugs, snails and ants, but should be applied only to problem areas ...
The De Villiers Graaff Motorway embankment rose in front of us, its golden sands deeply fissured by water run-off. From the top, Barker, a city planner by profession, explained how the landscape to ...