In Greek mythology the sorceress Medea, enraged at being supplanted by a rival for the affections of her husband Jason, presented the new bride with a robe possessing magic properties. The wearer of the robe immediately suffered a violent death. This death-by-indirection now finds its counterpart in what are known as “systemic insecticides.” These are chemicals with extraordinary properties which are used to convert plants or animals into a sort of Medea’s robe by making them actually poisonous. This is done with the purpose of killing insects that may come in contact with them, especially by
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