EM stands for essential micro-organisms. It is sprayed at the caravan park, horse stables, farmyard, and is thrown into drains, toilets, basins and water bowls. It neutralizes bad smells and get rid of unwanted bacteria. It also makes the outer layer of a fly's pupae (made out of keratin) harder, so it takes the fly longer to brake it open, then the fly's wings hardens before it is straight, so the fly can't fly then. So EM is a biological control of pests. This means it is not harmful to the environment and has no negative effects. We spray EM on a weekly basis.
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