Pariya, who started the final round four shots behind Lam in second place, fired a three-under-par 69 for a two-shot victory over his Singaporean opponent.

Lam carded a disappointing 75 on the Masters Course at Laguna National Golf and Country Club, while Nakul Vichitryuthasastr from Thailand and Filipino Juvic Pagunsan were a shot further back in joint third place.

'I really didn't think I had much chance of winning at the start of the day. Even after nine holes I was a couple shots back but then things came together.

'It's a special feeling to win my first professional title especially as my parents are here this week,' said Pariya, who ended with a four-round aggregate of 11-under-par 277.

The 24-year-old from Bangkok, who only turned professional in March, made birdies on 13, 14 and 16 to claim a cheque for US$8,126 (S$12.164).

'This win gives me a lot of confidence. I will play the final two events on the Mercedes-Benz Tour this year and head to the Asian Tour Qualifying School,' said Pariya, who will also play in the 18-hole qualifier tomorrow for next week's Barclays Singapore Open.

Lam, who won the season-opening Mercedes-Benz Masters Indonesia in May, was not too disappointed with the result.

'I had a couple of bad breaks and made a couple of bad decisions. I came into the week with no expectations and wanted to warm up for the Barclays Singapore Open,' he said.

Pagunsan was in the joint lead on 11 under for the tournament playing the 180-yard par-three 17th. He was four under for his round, but hit his tee shot into the water and walked away with a triple-bogey six.

Singapore's top golfer Mardan Mamat finished in joint 11th place after his third 72 on the trot to close the tournament on three under par.

Leading final round scores (par 72): 277 - Pariya Junhasavasdikul (THA) 68-67-73-69 279 - Lam Chih Bing (SIN) 67-70-67-75 280 - Nakul Vichitryuthasastr (THA) 69-74-67-70, Juvic Pagunsan (PHI) 69-73-67-71 281 - M. Sasidaran (MAS) 66-74-68-73 282 - Jay Bayron (PHI) 73-69-71-69, Danny Chia (MAS) 70-74-69-69 283 - Maan Nasim (INA) 75-70-70-68, Michael Bibat (PHI) 70-70-68-75 284 - Pravee Visalkit (THA) 72-69-71-72

--AFP