  The suppression of heavy quarkonia e.g. $J/\psi$, $\Upsilon$ etc. is
considered as a suitable probe to identify the nature of the matter created in
heavy ion collisions. Recently we have presented a modified colour screening
model for $J/\psi$ suppression in the quark gluon plasma (QGP) using
quasiparticle model as the equation of state. In this paper, we extend our
model to calculate the anomalous suppression of various states of $\Upsilon$
arising due to QGP medium alone. We obtain the suppression patterns of
different bottomonia states with respect to centrality at various available
collision energies and compare them with the available experimental data.
