Oviposition preference
When exposed to equal masses of cultivated and wild blackberries, laboratory-reared female D. suzukii laid more eggs in wild fruit (Fig. 4; 0.80 ± 0.05 SEM for wild, 0.20 ± 0.05 for cultivated; p < 0.0001, t13 = 5.72, Student t-test). The number of wild berries per replicate varied (1-9 berries/replicate, median = 5 berries) due to the variability in the weights of the cultivated berries (0.82-4.41 g/berry, median weight = 3.38 g). However, when exposed to a single berry of each type, that preference was reversed (Fig. 4; 0.14 ± 0.05 for wild, 0.86 ± 0.05 for cultivated, p < 0.0001, t12 = 4.65).