No. 18 Arkansas rode a hot second half from Zvonimi Ivisic to overcome a pesky Troy team 65-49 in a nonconference home win on Wednesday night in Fayetteville, Ark.Ivisic, who scored 19 points and blocked five shots, provided a second-half spark off the bench as he shot 5 of 6 from 3-point range and scored 16 points after intermission. Adou Thiero also had 19 points and added seven rebounds while Boogie Fland added 12 points.Jackson Fields led Troy with 13 points while Myles Rigsby added 12.Using its 2-3 zone, Troy (2-1) thwarted the Razorbacks’ offensive flow. In the first half, Arkansas (2-1) shot an air ball on its first possession for a shot-clock violation, missed two dunks, shot 29 percent from the field and made just 2 of 11 shots from 3-point range.Even with 12 first-half turnovers, Troy was able to hold a 27-26 halftime lead. The Razorbacks caught fire from the field in the second half, shooting 64 percent from the field and 67 percent from 3-point range.