Agrilus mali

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Agrilus mali - (a) adult, (b) infested apple tree, (c) larval galleries in wood, (d) larva, (e) emerging young adults (click on image to enlarge it)
Author(s): Tohir A. Bozorov et al.
Source: Ecology and Evolution (2019), 9, p. 1166

Agrilus mali Matsumura, 1924 - (apple buprestid)

This wood-boring beetle is a pest of apple trees in north-eastern Asia. Its native distribution includes Japan, Korea, north-eastern China and far-eastern Russia. First recorded in 1993, it is invasive in parts of north-western China, where it has been causing serious damage to Malus sieversii forests and is also spreading to neighbouring Kazakhstan (Bozorov et al., 2019 and Volkovitsh et al., 2020). A. mali has quarantine status in other apple-growing regions.

The adult beetle is 7-10 mm long, metallic brown with a greenish tinge underneath. Adults emerge from the trunks of infested trees in the summer and females lay eggs on the bark of stems and branches. The emerging larvae bore into the wood and develop in the xylem.