The suppression of turbulence by the EXB shear is studied in systems w
ith quasisymmetry using the nonlinear analysis of eddy decorrelation p
reviously utilized in finite aspect ratio tokamak plasmas [Phys. Plasm
as 2, 1648 (1995)]. The analytically derived EXB shearing rate which c
ontains the relevant geometric dependence can be used for quantitative
assessment of the fluctuation suppression in stellarators with quasis
ymmetry. (C) 1997 American institute of Physics. [S1070-664X(97)02910-
8].