Eriophyes tiliae
Pest description and damage A very tiny eriophyid mite; causes elongated, pimple-like, red to greenish galls on leaves. Damage is seldom serious.
Management-biological
Predatory mites are important biological control agents.
Management-chemical control
See Table 3 in:
Chemical Control of Landscape Pests
For more information
See "Gallmakers" in: