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Table 2 Resistance stability and pathogenicity of the ZJ0712-resistant Podosphaera xanthii isolates

From: Evaluation of the risk of development of resistance to QoI fungicide ZJ0712 in Podosphaera xanthii under greenhouse conditions

Isolate EC50 (μg/mL)/RFa Lesion area (mm2)
1st generation 10th generation FSCb
BH17 0.01/– 0.01/– 97.67 ± 8.76 ac
NR1 2.08/208 1.64/164 0.79 85.50 ± 9.99 a
NR2 1.87/187 1.79/179 0.96 93.00 ± 11.29 a
NR3 2.93/293 2.18/218 0.74 102.00 ± 6.96 a
NR4 2.94/294 2.27/227 0.77 96.00 ± 12.43 a
NR5 2.49/249 2.09/209 0.84 93.33 ± 18.26 a
NR6 2.71/271 2.35/235 0.87 95.48 ± 7.83 a
NR7 2.24/224 1.96/196 0.88 90.67 ± 10.27 a
  1. aRF, resistance factor, ratio of EC50 of fungicide-resistant isolates relative to 0.01 μg/mL (the sensitivity baseline of P. xanthii to ZJ0712, Wang et al. 2007)
  2. bFSC, factor of sensitivity change; the ratio of the RF value at the tenth generation to that at the first generation
  3. cValues followed by the same letter within a column do not differ significantly (P < 0.05)