Chris Pennell's two tries helped Worcester earn a bonus-point win at Parma in the European Challenge Cup.
Danny Gray slotted over two conversions and a penalty in a comfortable victory.
In addition to skipper Pennell's scores, wingers Josh Drauniniu and Tom Arscott also crossed for tries before the interval to give the Warriors a 27-3 advantage at the break.
Warriors lock Ben Gulliver went over for the visitors' only try of the second period in northern Italy.
Crociati Parma: Rubini (capt); En Naour, Vengoa, Damiani, Alberghini; Morisi, Zucconi; Singh, Manici, Coletti, Van Vuren, Fletcher, Mandelli, Delnevo, Cicchinelli.
Replacements: Sciacca, Goegan, Tripodi, Contini, Ruffolo, Ireland, Farolini, Magri.
Sin Bin: Van Vuren (26).
Worcester: Pennell (capt); Arscott, Short, Tu'ipulotu, Drauniniu; Gray, Arr; Douglas, Fortey, Tomaszczyk; Gulliver, Gillies; Betty, Kvesic, Balding.
Replacements: Hayes, Taumoepeau, Currie, Lutui, Abbott, Frost, Goode, Benjamin.
Referee: Andrew McMenemy (Scotland).