Table 1.
Log-concentration probit-mortality regression data for indoxacarb and metaflumizone tested against a susceptible strain and ten field populations of P. xylostella.
| Population/Strain | Location of collection† | Time of collection | Indoxacarb
|
Metaflumizone
|
||||
|---|---|---|---|---|---|---|---|---|
| Slope (±SE) | LC50 (95%FL‡) (mg/L) | RR § | Slope (± SE) | LC50 (95%FL‡) (mg/L) | RR§ | |||
| Susceptible laboratory strain | ||||||||
| Roth | 1.8 ± 0.2 | 0.10 (0.08–0.13) | 2.5 ± 0.3 | 2.17 (1.48–3.07) | ||||
| Field-collected populations | ||||||||
| BY12 | Baiyun, GD | Nov. 2012 | 1.1 ± 0.2 | 74.96 (50.07–122.3) | 750 | 0.9 ± 0.2 | 152.8 (90.72–385.2) | 70 |
| ZH12 | Zhuhai, GD | Nov. 2012 | 0.9 ± 0.1 | 9.53 (5.97–15.16) | 95 | 1.1 ± 0.1 | 16.89 (11.32–25.13) | 8 |
| BY13 | Baiyun, GD | Nov. 2013 | 2.1 ± 0.6 | 25.40 (13.62–36.28) | 250 | 0.8 ± 0.2 | 22.56 (7.57–52.77) | 10 |
| ZC13 | Zengcheng, GD | Nov. 2013 | 0.6 ± 0.1 | 5.57 (1.73–12.33) | 56 | 1.0 ± 0.1 | 8.28 (4.33–13.66) | 4 |
| HZ13 | Huizhou, GD | Nov. 2013 | 1.0 ± 0.2 | 4.81 (2.49–8.17) | 48 | 1.0 ± 0.2 | 5.96 (3.35–9.85) | 3 |
| SY14 | Sanya, HN | Jan. 2014 | 1.0 ± 0.3 | 85.00 (42.66–177.8) | 850 | 1.0 ± 0.1 | 13.04 (4.98–27.52) | 6 |
| HF14 | Hefei, AH | May 2014 | 2.9 ± 0.4 | 12.81(9.626–17.62) | 128 | 3.7±0.5 | 5.555 (4.335–7.337) | 3 |
| BY14 | Baiyun, GD | Nov. 2014 | 1.2 ± 0.2 | 87.03 (44.80–226.3) | 870 | 1.3±0.2 | 106.8 (37.99–854.2) | 49 |
| HZ14 | Huizhou, GD | Nov. 2014 | 1.7 ± 0.2 | 35.31(21.85–60.91) | 350 | 1.7±0.2 | 12.01 (7.479–19.43) | 5 |
| ZC14 | Zengcheng, GD | Nov. 2014 | 1.5 ± 0.2 | 3.366 (1.897–5.602) | 34 | 1.8±0.3 | 1.918 (1.104–3.073) | 1 |
| SZ14 ¶ | Shenzhen, GD | Nov. 2014 | ||||||
†
GD: Guangdong province. HN: Hainan province. AH: Anhui province of China.
‡
95% Fiducial limits.
§
RR (resistance ratio) = LC50 of field populations/LC50 of Roth.
¶
Bioassay data was not available because not enough larvae were produced when reared in the laboratory.