  The charge changing weak production of Delta in nucleons and nuclei is
studied. The reactions e^{-} p -> Delta^{0} \nu_{e} and e^{+} p -> Delta^{++}
\bar{\nu}_{e} are considered as a possible source of information about the weak
N-Delta transition form factors. The low q^2 BNL data on neutrino production of
Delta are used to extract the axial vector N-Delta coupling, taking into
account the deuteron structure and the Delta width. Finally, pion production
induced by neutrinos in ^{16}O in the Delta region, relevant to atmospheric
neutrino experiments, is investigated.
