  We study the effects of squark generation mixing on squark and gluino
production and decays at LHC in the Minimal Supersymmetric Standard Model
(MSSM) with focus on the mixing between second and third generation squarks.
Taking into account the constraints from B-physics experiments we show that
various regions in parameter space exist where decays of squarks and/or gluinos
into quark flavour violating (QFV) final states can have large branching
ratios. Here we consider both fermionic and bosonic decays of squarks. Rates of
the corresponding QFV signals, e.g. pp -> t t bar{c} bar{c} missing-E_T X, can
be significant at LHC(14 TeV). We find that the inclusion of flavour mixing
effects can be important for the search of squarks and gluinos and the
determination of the underlying model parameters of the MSSM at LHC.
