The 15-year-old from Saraburi shot a final 71 for a total four under-par-212 to win the eighth and final leg of the Thai LPGA event after dominating the fourth to the seventh legs in Hua Hin (Royal Club) in May, the 5th in Rayong in June, the sixth in Hua Hin (Black Mountain Golf Club) in July and the previous stop earlier this month in Khon Kaen.
"I'm happy to make it five in a row. But I wasn't happy with the final round as I missed too many short putts," said Arpichaya who won the winner's prize money of Bt142,000.
Dussavi, 20, signed of with a 27 on 213 and earned Bt96,285.
Top 35 money leaders from all eight legs will be eligible to compete in the Bt4 million Thailand LPGA Masters due at the Panya Indra Golf Club in Bangkok between September 19-21.