Mean fresh weight biomass in Kg (Standard Error) of new growth measure 20 weeks after treatment by shearing shrubs to their pretreatment size and weighing the freshly cut leaves and twigs.
| Species | Nontreated Control Kg (S.E.) of Biomass | 1000 ppm PBZ Kg (S.E.) of Biomass | 4000 ppm PBZ Kg (S.E.) of Biomass |
|---|---|---|---|
| Abelia × grandiflora | 1.39 (.17) a* | 0.93 (.09) b | 0.68 (.09) b |
| Ligustrum japonicum | 4.13 (.35) a | 3.13 (.17) b | 2.62 (.12) b |
| Ligustrum sinense | 1.07 (.14) | 1.04 (.08) | 0.93 (.14) |
| Loropetalum chinensis | 2.16 (.08) a | 1.54 (.08) b | 1.46 (.08) b |
↵*Means followed by the same letter are not significantly different as determined by ANOVA test and Student-Newman-Keuls separation of mean, α = 0.05.