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Why are locusts harmful?

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The locust swarm of lore is one life phase of a type of short-horned grasshopper. It's a phase that can become a plague under the right conditions. (You might recall the one mentioned in the Book of Exodus.) The swarms can cover hundreds of square miles and consist of many billions of locusts. read more

When they swarm during migration and mating they eat every green thing in their path. Locust swarms can destroy thousands of acres of food crops, strip trees, destroy flowers and ornamental plants. read more

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