Kevin Toner's first half winner stretched St Patrick's Athletic unbeaten run to four games as they dominated this SSE Airtricity League Premier Division clash at the UCD Bowl.
A tenth straight league defeat, in which they've managed just one goal, means UCD drop to the foot of the table.
With key men Gary O'Neill and Neil Farrugia, having moved to Shamrock Rovers during the week, UCD boss Collie O'Neill gave a first team debut to under-19s midfielder Aaron McGrath while naming just four players on the bench.
St Patrick's boss Harry Kenny rewarded Jake Walker for his winner against Finn Harps last time out with his first league start of the season.
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