  Primordial black holes (PBHs) have motivated many studies since it was shown
that they should evaporate and produce all kinds of particles. Recent
experimental measurements of cosmic rays with great accuracy, theoretical
investigations on the possible formation mechanisms and detailed evaporation
processes have revived the interest in such astrophysical objects. This article
aims at using the latest developments on antiproton propagation models together
with new data from BESS, CAPRICE and AMS experiments to constrain the local
amount of PBH dark matter. Depending on the diffusion halo parameters and on
the details of emission mechanism, we derive an average upper limit of the
order of rho < 1.7E-33 g cm^-3.
