There were no significant difference in germination percentage, germination energy, vigor index, seedling dry weight, root length and seedling height after coating with 1:10 and 1:20 RB from the control coated with base coating agent. The vigor index, seedling dry weight and shoot height when coating with 1:30 RB were all significantly higher than those of non-coated control (Table 1). There were no significant differences in seedling protective enzymes, MDA and chlorophyll content among all treatments (Table 2).