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Twenty thousand (20,000) is the number of ladybugs that it takes to eat about 1 million aphids. The insects in question (Coccinellidae family) may eat 50 to 60 aphids a day in the mature stage. They will need to total 20,000 to eat a million aphids in one day but only 2,000 to eat 1 million in a year since researchers estimate the yearly total at 5,000.

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9y ago

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