Table 1. Index in pot tests.

RBC-E index	control efficacy
0	<50% at 250 ppm
1	≥50% and <95% at 250 ppm
2	≥95% at 250 ppm and <50% at 50 ppm
3	≥50% and <80% at 50 ppm
4	≥80% and <95% at 50 ppm
5	≥95% at 50 ppm and <50% at 12.5 ppm
6	≥50% and <80% at 12.5 ppm
7	≥80% and <95% at 12.5 ppm
8	≥95% at 12.5 ppm and <50% at 3.13 ppm
9	≥50% and <80% at 3.13 ppm
10	≥80% and <95% at 3.13 ppm
11	≥95% at 3.13 ppm and <50% at 0.781 ppm
12	≥50% and <80% at 0.781 ppm
13	≥80% and <95% at 0.781 ppm
14	≥95% at 0.781 ppm and <50% at 0.195 ppm