agriculture

Of the many natural enemies of the vine, one is the most destruc­tive. It is a parasitical insect, the root-burrowing plant louse, phyl­loxera vasatrix. Many varieties of grape vines are fatally susceptible to its attack. Although phylloxera apparent­ly has always lived in the eastern United States, native American vines like Concord, Catawba, and Delaware have… read more »