Ladd made good on 6-of-8 from the floor including two 3-pointers and was one rebound shy of a double-double for the Cougars (9-4). Brock Motum also scored 17 points to go with seven rebounds, while DaVonte Lacy contributed 16 points in the win.
For the Bengals (1-10), Chris Hansen scored a team-high 12 points but was the only Idaho State player in double-figures.
The Cougars made good on 4-of-9 from shots beyond the arc while limiting their opponents to a mere 6-of-20 from the floor, en route to a 34-14 advantage at the half.
Washington State continued it's impressive shooting, going 11-of-22 from the floor while making 15-of-20 from behind the free-throw line in the second half.
Washington State dominated on the boards, 43-16, and second chance points, 20-0.