  We consider wake-like density fluctuations produced by cosmic strings at the
quark-hadron transition in the early universe. We show that low momentum axions
which are produced through the radiation from the axionic string at an earlier
stage, may get trapped inside these wakes due to delayed hadronization in these
overdense regions. As the interfaces, bordering the wakes, collapse, the axions
pick-up momentum from the walls and finally leave the wake regions. These
axions thus can produce large scale iso-curvature fluctuations. We have
calculated the detailed profile of these axionic density fluctuations and
discuss its astrophysical consequences.
