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Table 1. Dose-mortality bioassays of neonate larvae of various lepidopteran species using neonicotinyl and standard insecticides, 1999-2003.
|
| Insecticide |
Year |
No.
individuals |
MFR
mg AI/liter |
Slope (SE)a |
LC 50 |
Toxicity Index |
Estimated mortality (%) at proportion
of maximum field rate |
Estimated value |
mg AI/liter (95% CI) |
1 ´ MFR |
0.1 ´ MFR |
| Pandemis pyrusana larvae |
| Acetamiprid 70WP |
2001 |
400 |
45 |
1.4 (0.4) |
410.5 (245.7-1627.4) |
7.56 |
0.23 |
| Thiacloprid 480SC |
2001 |
400 |
75 |
3.0 (0.9) |
58.6 (23.9-81.0) |
62.37 |
0.36 |
| Clothianidin 50WP |
2003 |
350 |
56 |
2.9 (0.7) |
186.0 (127.7-251.8) |
7.07 |
0.00 |
| Spinosad 2SC |
2001 |
400 |
46 |
3.0 (0.8) |
0.4 (0.2-0.6) |
99.98 |
96.76 |
| Obliquebanded leafroller larvae |
| Acetamiprid 70WP |
2001 |
400 |
45 |
1.8 (0.4) |
107.6 (67.2-154.6) |
22.84 |
0.55 |
| Thiacloprid 480SC |
2001 |
400 |
75 |
4.1 (0.7) |
56.6 (43.0-70.2) |
69.77 |
0.02 |
| Clothianidin 50WP |
2003 |
350 |
56 |
2.1 (0.4) |
75.0 (45.1-109.1) |
42.12 |
1.08 |
| Spinosad 2SC |
2001 |
400 |
46 |
4.8 (1.0) |
0.5 (0.3-0.6) |
100.00 |
100.00 |
| Lacanobia subjuncta larvae |
| Acetamiprid 70WP |
2000 |
400 |
45 |
3.0 (0.6) |
71.3 (46.8-100.3) |
26.10 |
0.0136 |
| Thiacloprid 480SC |
2000 |
400 |
75 |
3.9 (1.1) |
110.3 (62.5-149.5) |
28.53 |
0.0004 |
| Spinosad 2SC |
2000 |
400 |
46 |
2.4 (0.6) |
1.6 (0.9-2.5) |
99.97 |
85.5568 |
| Codling moth larvae (no. entries) |
| Acetamiprid 70WP |
1999 |
600 |
45 |
2.0 (0.4) |
3.1 (1.4-5.1) |
99.0 |
62.42 |
| Thiacloprid 480SC |
1999 |
600 |
75 |
1.2 (0.2) |
3.5 (0.7-8.7) |
94.3 |
64.81 |
| Clothianidin 50WP |
2003 |
700 |
56 |
1.2 (0.2) |
2.4 (0.2-6.7) |
95.1 |
67.65 |
| Azinphosmethyl 50WP |
1999 |
600 |
449 |
2.4 (0.5) |
6.9 (3.0-10.1) |
100.0 |
97.64 |
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a A 't' ratio test on the slope parameter of each probit line was conducted and in each case was greater then 1.96 indicating a linear fit for the data.
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