Table 1. Sensitivity of eight QoI fungicide-resistant mutants of Peronophythora litchii to four QoI fungicides.
| Isolate | Origina | RFb | |||||
|---|---|---|---|---|---|---|---|
| Parent | Mutant | Azoxystrobin | SYP-2815 | ZJ0712 | SYP-1620 | Enestroburin | |
| 11–4 | M11–4 | Azoxystrobin in media | >9000 | >500 | >500 | >200 | >100 |
| 38 | S38 | SYP-2815 in media | >4000 | >2000 | >500 | >500 | >100 |
| 0913-2 | SU1 | UV radiation | 489 | 294 | >600 | >191 | >100 |
| 0913-2 | SU2 | UV radiation | 225 | 184 | 190 | >191 | >100 |
| 0908 | B0908 | ZJ0712 in media | >2500 | >500 | >1000 | >500 | >100 |
| BUP | BU | UV radiation | >5000 | >500 | >1000 | >500 | >100 |
| 11–4 | A11–4 | SYP-1620 in media | 14.32 | 29.16 | 3.02 | >1000 | >100 |
| 0902 | A0902 | SYP-1620 in media | 15.56 | 58.15 | 9.84 | >500 | >100 |
aMutants were obtained by exposure of field isolates (parents) to fungicide in media or to UV light.
bRF, Resistance factor, a ratio of EC50 for a fungicide-resistant mutant relative to EC50 for the parental isolate.