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Table 3. LC50 and LCR values for G1 of field-collected populations of C. rosaceana in comparison to a susceptible laboratory population, 2000–01
mg AI/liter
C. rosaceana LC50 95% FL LCR 95% CL2
Insecticide Year Colony n Slope ± SE LC50 lower - upper LCR1 lower - upper Significance
Azinphosmethyl 2001 LAB 300 3.9±0.9 6.7 4.3 - 8.6 ---- ---- ----
2001 BO 300 2.3±0.4 70.6 38.4 - 106.0 10.5 6.5 - 16.9 *3
2001 MF2 300 2.5±0.6 167.8 98.8 - 266.1 25.0 2.8 - 220.2 *
2001 MF3 300 2.7±0.5 179.7 127.2 - 255.3 26.8 17.8 - 39.9 *
2001 BR 300 2.2±0.4 34.7 18.6 - 51.0 5.2 3.0 - 8.7 *
2001 MA2 300 2.9±0.5 129.9 88.1 - 178.3 19.4 12.8 - 28.9 *
2001 AR 300 2.8±0.6 41.3 21.3 - 57.7 6.2 3.8 - 9.8 *
Methoxyfenozide 2001 LAB 300 2.3±0.4 2.0 1.2 - 2.7 ---- ----
2001 MF2 300 2.2±0.6 16.0 9.1 - 31.0 8.2 4.7 - 14.2 *
2001 BR 300 2.7±0.7 9.7 4.6 - 15.4 5.0 2.9 - 8.5 *
2001 MA2 300 1.6±0.3 11.4 6.1 - 3.0 5.8 3.2 - 10.5 *
2001 AR 300 1.4±0.2 10.9 5.7 - 30.3 5.6 3.0 - 10.4 *
Spinosad 2001 LAB 300 4.8±1.0 0.5 0.35 - 0.6 ---- ----
2001 BO 300 2.4±0.6 0.5 0.017 - 0.8 1.0 0.6 - 1.8 ns
2001 TF2 210 2.6±0.5 0.2 0.13 - 0.3 0.4 0.2 - 0.6 *
2001 MF2 300 2.5±0.4 0.5 0.34 - 0.7 1.0 0.6 - 1.5 ns
2001 MF3 300 2.4±0.4 0.6 0.41 - 0.8 1.2 0.8 - 1.9 ns
2001 BR 300 3.0±0.7 0.3 0.17 - 0.4 0.6 0.4 - 0.9 *
2001 MA2 300 4.6±1.1 0.5 0.33 - 0.7 1.1 0.7 - 1.6 ns
2001 MA3 150 2.7±0.7 0.3 0.12 - 0.4 0.5 0.3 - 0.9 *
2001 AR 300 2.3±0.4 0.4 0.22 - 0.5 0.7 0.4 - 1.1 ns
Indoxacarb 2000 LAB 300 1.8±0.2 1.2 0.7 - 1.7 ---- ----
2000 TF2 300 1.4±0.2 1.4 0.08 - 2.3 1.2 0.7 - 2.1 ns
2000 AR 300 0.4±0.2 51614 ---- 4,440 1.1 - 1.8 x 107 *

1LCR, Lethal Concentration Ratio: LC50X / LC50LAB
2Confidence limits of the LCR calculated according to Robertson and Preisler (1992)
3Significantly different from respective LAB (α = 0.05), limits of LCR do not include 1.0
4Unable to cause >22% mortality at limits of indoxacarb solubility
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