Fig. 2From: Biological parameters of two syrphid fly species Ischiodon scutellaris (Fabricius) and Episyrphus balteatus (DeGeer) and their predatory potential on wheat aphid Schizaphis graminum (Rondani) at different temperaturesComparative fitness of larval instars (a) and adult flies (b) of I. scutellaris and E. balteatus, expressed in terms of developmental times of each stage. The bars are means ± SEM, and the different lowercase letters above each bar demonstrate significant differences within the data, while an asterisk above a pair of the bars presents a significant difference between two predator species (P < 0.05)Back to article page