Adelaide full-forward Scott Welsh booted eight goals as the Crows consolidated their AFL top four with a 70-point thrashing of a stumbling Richmond at Telstra Dome.

The Crows won every quarter, with Ian Perrie providing a great support act to Welsh with five majors as Adelaide won 20.12 (132) to 9.8 (62).

It was the eighth straight win for Adelaide over the Tigers, the club's greatest winning streak against any team, in a head-to-head dominance that has now stretched over five seasons.

And for the Tigers, who were woefully uncompetitive for most of the match, it was their fourth straight loss.

It continues a disastrous recent tradition of June fadeouts for Richmond.

It also casts a huge dark shadow on what had been a bright 7-2 start under new coach Terry Wallace, with the club now entering the bye week on a shaky 7-6 win-loss record and coming off probably its worst performance of the season.

Adelaide was in control all over the ground.

The Crows' midfielders gave their forwards great service, with Scott Thompson superb, Brett Burton, Mark Ricciuto and Simon Goodwin winning plenty of possessions and Tyson Edwards providing some stunning delivery into attack.

Adelaide's defenders also provided plenty of run, particularly youngster Nathan Bock, who continued his sensational form at centre halfback this season.

Bock not only acted as a roadblock in defence, but was one of the Crows' most creative players with his hard running up the ground, with Ben Hart and Nathan Bassett also doing plenty of attacking from the backlines.

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