  We present studies that show how multi-parton interaction and color
reconnection affect the hadro-chemistry in proton-proton (pp) collisions with
special focus on the production of resonances using the PYTHIA8 event
generator. We find that color reconnection suppresses the relative production
of meson resonances such as $\rho_{0}$ and K*, providing an alternative
explanation for the K*/K decrease observed in proton-proton collisions as a
function of multiplicity by the ALICE collaboration. Detailed studies of the
underlying mechanism causing meson resonance suppression indicate that color
reconnection leads to shorter, less energetic strings whose fragmentation is
less likely to produce more massive hadrons for a given quark content,
therefore reducing ratios such as K*/K and $\rho_0/\pi$ in high-multiplicity pp
collisions. In addition, we have also studied the effects of allowing string
junctions to form and found that these may also contribute to resonance
suppression.
