A black plant louse that lives on oaks and dogwoods.

寄居在橡树和椋木上的黑色木虱。

This burrowing plant louse devastated European vineyards between1860and1880and its descendants are now ravaging Californian grape vines.

这种虫害在1860年到1880年间毁灭了欧洲葡萄园，而它们的后代现在也给加州的葡萄秧造成损害。