Figure 6. Mean percentage increases or decreases in developmental time for predatory larvae treated with topical sprays of four pyrethroid insecticides applied at various concentrations. Unshaded bars indicate values not significantly different from controls in one-way ANOVA (P > 0.05). The respective material concentrations for C. rufilabris, C. coeruleus, C. sanguinea, H. axyridis and O. v-nigrum were as follows: bifenthrin - FR/10, FR/1000, FR/1000, FR/1000 and FR/100; cyfluthrin - FR/10, FR/1000, FR/100, FR/100 and FR/100; fenpropathrin - FR/10, FR/100, FR/100, FR/1000 and FR/100; zeta-cypermethrin - FR/10, FR/1000, FR/1000, FR/1000 and FR/100. FR = field rate (see Table 1 for ppm). .