Fassotte, C. 2003 De kommaschildluis (Lepidosaphes ulmi L.) duikt opnieuw op in de geïntegreerde fruitteelt.) [The oystershell scale (Lepidosaphes ulmi L.) reappears in integrated fruit cultivation.]. Fruitteelt Nieuws 16(10): 24-29.

Notes: The life cycle, natural enemies, control methods, and monitoring of insect populations in pome fruit orchards in Belgium are described.