31. Freight traffic consisted of outbound lumber and forest products as well as diatomaceous earth ( filtering ). 32. Mix diatomaceous earth and pyrethrin in a 9-to-1 ratio, respectively, and dust it directly onto the mounds. 33. Spray the foliage with neem, and to get them in the soil, apply beneficial nematodes or diatomaceous earth . 34. Mr . Headley uses slug poison, but organic gardeners might try mixing diatomaceous earth all through the leaves. 35. Bonsai enthusiasts use it as a soil additive, or pot a bonsai tree in 100 % diatomaceous earth . 36. In most areas cartridge filters are less expensive than diatomaceous earth filters but cost more than sand filters. 37. Dynamite, a safe to handle blend of nitroglycerin and diatomaceous earth was patented in 1867 by Alfred Nobel. 38. Another organic answer is a mixture of diatomaceous earth and pyrethrin, said Howard Garrett, a Metroplex organics expert. 39. A garlic-pepper spray with diatomaceous earth ( DE ) added for an extra boost could provide some control. 40. _Filters : The three most common filters are sand, the most popular and cheapest; diatomaceous earth ; and cartridge.
