Table 2. Regression estimates resulting from topical bioassays of adult Leptinotarsa decemlineata at the Arlington (AARS) and Hancock Agricultural Research Stations (HARS), plus agricultural fields classified as systemic-1, 2 and 3 in 2011, 2013 and 2014.
| Population | Year1 | N2 | Slope(SEM)3 | LC50 (PPM) | 95% CI | Resistance Ratio4 |
|---|---|---|---|---|---|---|
| Arlington | 2011 | 600 | 3.13(0.33) | 0.027 | (0.028–0.34) | NA |
| Hancock | 2011 | 525 | 1.47(0.11) | 0.48 | (0.4–0.6) | 17.77 |
| systemic-1 | 2011 | 425 | 1.63(0.14) | 0.72 | (0.59–0.87) | 26.66 |
| systemic-2 | 2011 | 524 | 1.9(0.27) | 0.62 | (0.41–0.94) | 22.96 |
| systemic-3 | 2011 | 500 | 2.03(0.73) | 0.73 | (0.51–1.04) | 27.03 |
| Arlington5 | 2013 | 400 | 2.23(.25) | 0.09 | (.08-.12) | NA |
| Hancock | 2013 | 300 | 0.73(.23) | 0.91 | (.49–4.30) | 10.11 |
| systemic-15 | 2013 | 350 | 0.69(.26) | 1.83 | (.21–12.36) | 18.18 |
| systemic-2 | 2013 | 350 | 1.49(.37) | 1.10 | (.58–1.61) | 11.11 |
| systemic-35 | 2013 | 350 | 2.08(.30) | 1.20 | (.94–1.57) | 12.12 |
| Arlington | 2014 | 500 | 0.55(.12) | 4.72 | (1.57–10.74) | NA |
| Hancock | 2014 | 500 | 0.80(.09) | 8.69 | (5.00–15.19) | 1.84 |
| systemic-1 | 2014 | 500 | 1.05(1.0) | 12.81 | (8.73–19.96) | 2.71 |
| systemic-2 | 2014 | 500 | 0.71(.09) | 43.67 | (23.60–109.27) | 9.25 |
| systemic-3 | 2014 | 500 | 0.66(.09) | 52.68 | (25.31–154.56) | 11.16 |
1 2011 data is reported regression estimates obtained from Huseth and Groves (4).
2 Total number of adult beetles used in biological replicates at each location and year combination.
3 Mean slope estimates of the probit linearized dose response function plus standard error
4 Resistance ratio estimates comparing test populations to the reference control population (AARS) in each year.
5 Populations of Leptinotarsa decemlineata used in transcriptome assembly