Barcelona B ended a run of two-straight defeats as they hammered Real Murcia 4-0 in their Segunda Division clash.
The home side took the lead in the 12th minute when Munir El Haddadi latched onto a through-ball and slotted an effort past Casto.
Barcelona doubled their lead minutes later when Jean Marie Dongou collected a pass from Denis Suarez and found the net with a low effort.
Wellington Silva almost got a goal back for the visitors as he tried an effort from distance which beat Jordi Masip but went wide of the post.
The hosts got their third goal when Edu Bedia was brought down in the area by Mauro Dos Santos. Bedia himself stepped up to take the spot kick and fired it past Canto, giving the keeper no chance.
After the break, Barcelona made it four in spectacular fashion as Adama Traore beat the challenge of Alex Martinez and then fired a powerful effort past Casto.
The visitors pushed to get a consolation goal late in the game and Francisco Molinero came closest, but his effort was deflected narrowly over Masip's bar.