  We calculate the dissociation rates of quarkonium ground states by tunnelling
and direct thermal activation to the continuum. For hadronic matter at
temperatures $T \leq 0.2$ GeV, neither of these mechanisms leads to a
sufficiently large dissociation to explain the experimentally observed
suppression of charmonium. Dissociation by sequential excitation to excited
energy levels, although OZI-forbidden, requires further analysis.
