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Table 3. Dose-mortality bioassays of codling moth adults using neonicotinyl insecticides and azinphosmethyl, 2002-2004.
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
Codling moth adults (residual exposure)
Acetamiprid 70WP
2002
175
44
1.5 (0.2)
4.0 (2.2-6.6)
94.1
52.4
Thiacloprid 480SC
2002
175
57
1.5 (0.2)
19.8 (10.2-37.1)
80.3
25.9
Clothianidin 50WP
2004
300
57
2.8 (0.6)
10.2 (6.3-13.4)
98.0
22.5
Azinphosmethyl 50WP
2002
100
1121
1.9 (0.3)
7.2 (3.8-13.1)
100.0
93.4
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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