title: Consumption of sugars by Anastrepha suspensa (Diptera: Tephritidae).
abstract: We were interested in determining the feeding response of the Caribbean fruit fly, Anastrepha suspensa Loew (Diptera: Tephritidae), to various sugar concentrations to develop an improved bait for adults. We compared the consumption of 0.01-1.00 M concentrations of glucose, fructose, raffinose, and sucrose in no-choice tests for 24-h- and 6-d-old male and female flies. Sucrose was the most consumed sugar or within the most consumed group of sugars at 0.02-0.20 M concentrations. There were no differences in consumption among sugars at 0.01, 0.40, and 1.00 M. Consumption generally increased with increasing sugar concentration except that sucrose consumption peaked at 0.20 M. Twenty-four-hour females consumed less fructose than other sugars; 24-h males consumed more sucrose than fructose or raffinose, with an intermediate response to glucose. Females in the 6-d group consumed more sucrose than the other three sugars, whereas 6-d males exhibited no difference in consumption among sugars. In choice tests, flies consumed more sugar solution than water, but the difference between 0.20 M fructose and water was not significant for 24-h males or 24-h females. In choice tests between 0.20 M fructose and 0.20 M sucrose, both 24-h and 6-d females showed a preference for fructose. Males of both age classes showed no preference. These results indicate that the responses of flies to different sugars can vary by sugar, gender, and age.
authors.affiliation: University of Florida, Institute of Food and Agricultural Sciences, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL 33850, USA. hnn@ufl.edu
authors.forename: H N
authors.initials: HN
authors.lastname: Nigg
authors.forename: R A
authors.initials: RA
authors.lastname: Schumann
authors.forename: R J
authors.initials: RJ
authors.lastname: Stuart
authors.forename: E
authors.initials: E
authors.lastname: Etxeberria
authors.forename: J J
authors.initials: JJ
authors.lastname: Yang
authors.forename: S
authors.initials: S
authors.lastname: Fraser
mesh_terms: D000375:Aging; D000818:Animals; D002241:Carbohydrates / Q000502:physiology*; D004175:Diptera / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology*; D005260:Female; D005632:Fructose; D005947:Glucose; D008297:Male; D011887:Raffinose; D012727:Sex Characteristics; D013395:Sucrose
chemical_list: D002241:Carbohydrates; D005632:Fructose; D013395:Sucrose; D005947:Glucose; D011887:Raffinose