Nephus ryuguus (Kamiya), a common ladybird beetle feeding on mealybugs in China, was found becoming a dominant predator of pine mealybug Oracella acuta (Lobdell) in forest in recent years.

• 圆斑弯叶毛瓢虫Nephus ryuguus (Kamiya)是我国常见的食蚧瓢虫，为近年在林间出现的湿地松粉蚧Oracella acuta (Lobdell) 优势天敌种类，对湿地松粉蚧有一定的控制作用。