James Eddie grabbed the bonus-point try for Glasgow

Having trailed to the winless Parma club 20-17 at half-time, the Warriors scored three unanswered tries after the break to secure victory.

Zebre enjoyed the better of a crazy first period, twice leading through tries from Dries van Schalkwyk and Tito Tebaldi, cancelled out by Byron McGuigan and Alex Dunbar in a quickfire opening 12 minutes.

Zebre were first to strike when, after just four minutes, Zebre number 8, van Schalkwyk intercepted a pass from Nikola Matawalu to race home from 70 metres.

The Warriors were quick to strike back with Byron McGuigan running from deep on the left before stepping inside some weak tackles to touch down under the posts. Scott Wight made no mistake from the conversion.

Zebre were back in front just a couple of minutes later when Wight's clearance kick was charged down and Tebaldi was the quickest to react for the try.

But again, Glasgow came back with Alex Dunbar stepping inside three men for the try after great work from Matawalu. Wight's conversion levelled the game at 14 each.

Scott Wright's penalty gave Glasgow the lead but Daniel Halangahu kicked two before the interval to swing it Zebre's way.

But it was all Glasgow in the second half.

Both teams went down to 14-men - Graeme Morrison to a yellow card two minutes into the second half while Filippo Ferrarini followed him moments later.

Glasgow enjoyed a period of sustained pressure on the Zebre line but the visiting were pack held up over the line after a quick tap and go from Matawalu.

The Warriors weren't to be denied, however, with McGuigan claiming his second of the afternoon after latching onto a long pass from Ryan Wilson.

Finn Russell, who had just replaced Wight missed the conversion with Halangahu following suit after Zebre were awarded a penalty in Glasgow's 22 in the 58th minute.

And the Warriors made Halangahu pay on the hour as Matawalu carved out another opportunity before feeding James Eddie on the wing for the visitor's fourth try and the bonus point.

Man-of-the-match Matawalu was at it again as Glasgow picked up a superb fifth try late on combining with Sean Kennedy and Tim Swinson to set up Peter Murchie with Russell slotting his second conversion.

We’re delighted,” said coach Gregor Townsend in the Scotsman. “We saw all the teams below us winning last night, and we dropped down to sixth. Now we’re back up to second, but we’ll have to play a lot better if we are to stay there.”

On that crazy opening 10 minutes, Gregor said: “I’ve seen a lot of rugby but and a lot of bizarre starts, but that was definitely out of the 
ordinary.

“It sometimes happens like that on Sunday afternoon after a weekend of watching the Six Nations.

“We suffered an interception and a charge-down. It certainly wasn’t what we were expecting, but I was really pleased that the guys stuck to their tasks. We defended much better after that.”