You may have sprayed garlic juice, tobacco juice, combonations thereof on your tomatoes to stave off aphids and the like...you may have sprayed any number of "organic solutions" on your precious crops. But, there is a naturally occuring compound that will not only protect your plants from unwanted insects, but for livestock as well. It's called Diatomaceous earth (DE, diatomite, diahydro) and it is a clever approach to pests. Yes I know, one plant's pest is some benign bat's snack...however, serious small-scale growers (say, tomatoes, green beans, squash, etc.) pull their hair out to keep insects nibbling on other things.
Diatomaceous earth is one good answer. It's simply a porous, chalky, white sedimentary rock composed of fossilized diatoms-- hard shelled algea. The compound absorbs the waxy outer layer of an insect's body; they die from dehydration.
DE can be used in livestock and humans, but the efficacy is low since there is no shortage of liquid in the digestive tracts of either. So, if you've run out of eco-friendly insecticide ideas, give this one a try. It doesn't smell and your plants won't mutate into super-tobacco.
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