Using a funnel, and measuring spoon, measure 8-10 tbsp of diatomaceous earth and put it in a 1-gallon sprayer. Screw on the lid or nozzle and give it a shake. Step 2: After you have identified the area of your home that needs DE and if it is both dry and warm, you can begin applying your DE mixture. Spray once or twice and move on.

Be careful to measure the diatomaceous earth with a small scoop or spoon in order to reduce airborne dust particles. Shake the mixture to combine, don your spraying mask and mist the plants with a thin, evenly-distributed layer on both the top and undersides of leaves - aim for wet, but not dripping, foliage.

To make a DE slurry, follow this ratio: ½ cup DE (8 tablespoons) for 2 cups of water You can apply the slurry with a spray bottle or a pressure washer. Once you mix the DE in the water, the DE will settle to the bottom, so you need to shake it up frequently as you spray.