Definition: Enemies of the vine

All predators, whether parasitic animals or diseases, that endanger the vine. The berries and inflorescences are vulnerable to insect bites, such as those from grape worms; the foliage is vulnerable to damage from caterpillars that hibernate under the bark of the stump; leafhoppers, red or yellow spiders; numerous cryptogamic diseases such as mildew, powdery mildew and grey rot, to name but the most important. Finally, there are diseases that attack the root system, such as nematodes and the dreaded phylloxera.