Bephratelloides cubensis(Ashmead), a seed-feeding wasp, is the primary pest of annonas in Florida. The weekly infestation rates of commercially grown sugar apples (Annona squamosaL.) and atemoyas (A. squamosa×A. cherimolaMiller) byB. cubensisin southern Florida were monitored. Infestation generally increased throughout the summer in atemoyas but remained very low in sugar apples. The observed patterns are attributable to the relative fruiting phenologies of the commercial species and of the overwintering host, the bullock's heart (A. reticulataL.). We found no evidence that diapause ofB. cubensisin atemoya and sugar apple fruits is of economic importance as an overwintering mechanism in Florida.