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Farmers trying to chase locusts away from their crops. Desert locusts have swarmed into Kenya from Somalia and Ethiopia, destroying farmland and crops.<br />
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According to the UN's Food and Agricultural Organisation (FAO) the current locust invasion, when an entire region is affected, is known as an 'upsurge'. However, if it gets worse and cannot be contained, over a year or more, it would become what is known as a 'plague' of locusts.