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| Hes·sian fly (plural Hes·sian flies) |
noun |
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| Definition: |
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small fly destructive to crops: a small fly of the gallfly family that lays its eggs on grain plants, where the larvae bore into the stems and weaken them. It causes severe damage to crops, especially wheat, barley, and rye. Latin name Mayetiola destructor.
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| [Because inadvertently brought to N America by Hessian troops] |
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