  For Toda systems with Cartan matrix either $B_2$ or $G_2$, we prove that the
local mass of blowup solutions at its blowup points converges to a finite set.
Further more this finite set can be completely determined for $B_2$ Toda
systems, while for $G_2$ systems we need one additional assumption. As an
application of the local mass classification we establish a priori estimates
for corresponding Toda systems defined on Riemann surfaces.

Analysis of PDEs