  We study massive particle radiation from cosmic string kinks, and its
observability in extremely high energy neutrinos. In particular, we consider
the emission of moduli --- weakly coupled scalar particles predicted in
supersymmetric theories --- from the kinks of cosmic string loops. Since kinks
move at the speed of light on strings, moduli are emitted with large Lorentz
factors, and eventually decay into many pions and neutrinos via hadronic
cascades. The produced neutrino flux has energy $E \gtrsim 10^{11} \rm{GeV}$,
and is affected by oscillations and absorption (resonant and non-resonant). It
is observable at upcoming neutrino telescopes such as JEM-EUSO, and the radio
telescopes LOFAR and SKA, for a range of values of the string tension, and of
the mass and coupling constant of the moduli.
