The event in Italy was Bescond's 91st individual World Cup outing and she was clearly tired of waiting to climb the podium as she quickly joined the leading pack.
And a late surge on the skies saw Bescond outsprint German Andrea Henkel to the line to win her first World Cup event in 20:32.2 minutes, with one penalty.
Henkel was runner-up, 6.7 seconds back, while Belarusian Darya Domracheva completed the podium in third, 10.1 further back.
Bescond's first victory sees her climb to 21st in the overall World Cup standings, still some way off troubling the leader Gabriela Soukalova from the Czech Republic as she is 190 points further ahead on 426.
Domracheva is second overall on 415 while Norway's Tora Berger is third two points further back after fnishing sixth in Antholz.