Abstract: The experiment was conducted to study the efficacy of bait (Protein hydrolysate and molasses) and dust formulation of carbaryl, with various concentrations against fruit flies infesting muskmelon under semi arid and water stress area of Dera Ismail Khan (D.I. Khan). Intermittent spray of protein hydrolysate caused least fruit infestation (12%) as compared to molasses (15%). Carbaryl dust (Sevin-10 D) mixed with soil dust at 1.5:15 and 3.0:15 were found statistically at par with bait sprays but significantly deteriorated the efficacy when applied at 1.0:15.