Digestive Enzyme Activity in the Gut of the Adult Apple Maggot, Rhagoletis pomonella1,2

Abstract
The presence of α-glucosidase-like activity was shown in the gut of the adult apple maggot (Diptera: Tephritidae). Activity in the midgut was slightly higher than in the foregut and hydrolysis occurred faster at 37° than at 22°C. Hydrolysis of a number of α-glucoside sugars suggested the presence of α-glucosidase rather than invertase. Tests for proteases were negative.