Technical Abstract: The brown sugar flotation and hot water methods are accepted procedures for detecting larval western cherry fruit fly, Rhagoletis indifferens Curran, in sweet cherry [Prunus avium (L.) L.] and could be included in a systems approach for showing the absence of larvae in fruit. The methods require crushing cherries and then submerging them in brown sugar solution or hot water to extract the larvae. Larvae are visually detected when they float to the surface of the brown sugar solution or sink in the hot water. The objective here was to test the efficacy of these two methods. Both methods detected at least one larva in all 288 moderately to heavily infested cherry samples. The brown sugar flotation and hot water methods detected 89.6–94.7% and 83.0–85.9% of total larvae, respectively, from cherry samples on each of three dates. Significantly higher percentages of 1st instars were detected using the brown sugar than hot water method on two dates, of 3rd instars on one date, and of total larvae on two dates. Percent detection of 3rd instars was higher than of 1st instars using both methods. For both methods, greater percentages of split whole cherries with seeds and non-split cherries had larvae than split whole cherries with no seeds and halved cherries. The brown sugar method may be more efficacious than the hot water method and could be integrated into a systems approach for R. indifferens, although more thorough crushing of cherries may result in even higher detection rates.