Fig. 2

Comparing the infectiousness of Rwandan (RW) and international entomopathogenic nematodes on Anomala graueri grubs in soil-based laboratory bioassays, depending on species/strain and on applied concentrations of 100, 200, 300, 400 and 1000 infective juveniles per grub equalling 14, 28, 42, 57 and 140 IJs per square centimetre soil. Dark grey bars = heterorhabdits, light grey = steinernematids, lined = verified in field trials (Figs. 4 and 5.); 7-day-corrected morality shown, this is mortality in EPN treatments minus natural mortality in untreated controls. Three sets of 10 bioassay arenas with single grubs in soil used per each of 3 to 15 experimental replicates; letters on bars indicate difference according to multiple comparison Tukey post hoc test at p < 0.05, additionally fdr-corrected among concentration experiments; error bars = SEM