Fact sheet Hessian fly and Barley stem gall midge What are these pests? What do they look like? These closely related flies are extremely difficult to

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• Protostome
• Galls
• Agriculture
• Hessian fly
• Mayetiola hordei
• Nematocera
• Pollinators
• Mayetiola
• Mosquito
• Agricultural pest insects
• Cecidomyiidae
• Phyla