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Left to right: A fully grown Agrilus biguttatus larvae; An adult Agrilus biguttatus beetle; Agrilus biguttatus larval feeding results in a network of galleries beneath the bark; A D-shaped exit hole is created when adult beetles emerge from the bark - its characteristic form is flat on one side and otherwise curved, shaped like a capital letter “D”

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Left to right: A fully grown Agrilus biguttatus larvae; An adult Agrilus biguttatus beetle; Agrilus biguttatus larval feeding results in a network of galleries beneath the bark; A D-shaped exit hole is created when adult beetles emerge from the bark - its characteristic form is flat on one side and otherwise curved, shaped like a capital letter “D”


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Credit line: Forestry Commission

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