Table 1.
Cypermethrin washoff of applied mass (means and 95% confidence intervals) and summary of statistical significance (Tukey's test) for Cynoff EC formulation
| Building material | Cynoff EC insecticide washoff (% of applied mass) | Tukey's groupinga |
|---|---|---|
| Clean vinyl siding | 14.1 (7.7–25.8) | A |
| Clean unpainted wood | 1.6 (0.85–2.86) | B |
| Clean aluminum siding | 1.0 (0.57–1.9) | B,C |
| Dirty painted wood | 0.30 (0.16–0.55) | C,D |
| Clean unpainted concrete | 0.14 (0.07–0.25) | D,E |
| Clean painted wood | 0.10 (0.06–0.19) | D,E |
| Clean asphalt | 0.06 (0.03–0.12) | D,E |
| Clean painted concrete | 0.06 (0.03–0.12) | D,E |
| Clean painted stucco | 0.04 (0.02–0.07) | E |
| Clean unpainted stucco | <0.01 (0.00–0.01) | F |
a
Tukey's multiple comparison test evaluates pairwise differences between materials. Materials sharing the same letter have mean percentage ofwashoffs of applied mass that are not significantly different. For example, clean painted stucco for the EC is an “E,” which means there is no difference between it and other “E” designations such as clean painted concrete; however, clean vinyl siding is an “A,” which means there is a significant difference between it and clean painted stucco.
EC = emulsifiable concentrate.