Soya beans (Table 28). Teflubenzuron is registered for use on soya beans in Brazil (0.0075-0.023 kg ai/ha) and Paraguay (2-3 treatments of 0.0075 kg ai/ha) with a PHI of 30 days in both countries.
Six trials were carried out in Brazil, four of them according to GAP. The residues were all <0.05 mg/kg in the beans, and 0.17 and 0.29 mg/kg in two samples of hulls.
One study involving replicated trials with various application rates was carried out in the USA. Except in one trial, residues in the dried beans were below the LOD of 0.05 mg/kg after 1 or 2 treatments at 0.022-0.34 kg ai/ha 28-43 days after application. In the exceptional trial residues in the dried beans were 0.05, 0.07, 0.16, 0.28 and 0.34 mg/kg from 2 x 0.034 kg ai/ha.
Table 28. Residues of teflubenzuron in soya beans from supervised trials.
|
Country, year |
Application |
PHI, days |
Sample |
Residues, mg/kg |
Report No. |
||
|
kg ai/hl |
kg ai/ha |
No. |
|||||
|
Brazil, 1989
|
0.006 |
0.015 |
2 |
21 |
seed |
<0.01 |
SHGR.90.017A
|
|
|
|
|
30 |
|
<0.01 |
||
|
0.012 |
0.030 |
2 |
21 |
seed |
<0.01 |
||
|
|
|
|
30 |
|
<0.01 |
||
|
Brazil, 1989
|
0.006 |
0.015 |
2 |
21 |
seed |
<0.01 |
SHGR.90.017B
|
|
|
|
|
30 |
|
<0.01 |
||
|
0.012 |
0.030 |
2 |
21 |
seed |
<0.01 |
||
|
|
|
|
30 |
|
<0.01 |
||
|
Brazil, 1985 |
0.012 |
0.030 |
1 |
53 |
hull |
0.17 |
BRA85I00801 |
|
|
|
|
53 |
seed |
<0.05 |
||
|
Brazil, 1985 |
0.036 |
0.090 |
1 |
53 |
hull |
0.29 |
BRA85I00901 |
|
|
|
|
53 |
seed |
<0.05 |
||
|
USA, 1987
|
0.012 |
0.022 |
1 |
47 |
seed |
<0.05 |
HAS A025.001
|
|
0.012 |
0.022 |
1 |
47 |
|
<0.05 |
||
|
0.12 |
0.22 |
1 |
47 |
|
<0.05 |
||
|
0.12 |
0.22 |
1 |
47 |
|
<0.05 |
||
|
0.015 |
0.022 |
1 |
30 |
seed |
<0.05 |
||
|
0.015 |
0.022 |
1 |
30 |
|
<0.05 |
||
|
0.15 |
0.22 |
1 |
30 |
|
<0.05 |
||
|
0.15 |
0.22 |
1 |
30 |
|
<0.05 |
||
|
0.024 |
0.022 |
1 |
43 |
seed |
<0.05 |
||
|
0.024 |
0.022 |
1 |
43 |
|
<0.05 |
||
|
0.24 |
0.22 |
1 |
43 |
|
<0.05 |
||
|
0.24 |
0.22 |
1 |
43 |
|
<0.05 |
||
|
0.015 |
0.022 |
1 |
42 |
seed |
<0.05 |
||
|
0.015 |
0.022 |
1 |
42 |
|
<0.05 |
||
|
0.15 |
0.22 |
1 |
42 |
|
<0.05 |
||
|
0.15 |
0.22 |
1 |
42 |
|
<0.05 |
||
|
0.12 |
0.34 |
1 |
28 |
seed |
<0.05 |
||
|
0.12 |
0.34 |
1 |
28 |
|
<0.05 |
||
|
0.015 |
0.034 |
2 |
30 |
seed |
0.34 |
||
|
0.015 |
0.034 |
2 |
30 |
|
0.28 |
||
|
0.015 |
0.034 |
2 |
30 |
|
0.07 |
||
|
0.015 |
0.034 |
2 |
30 |
|
0.16 |
||
|
0.015 |
0.034 |
2 |
35 |
|
<0.05 |
||
|
0.018 |
0.034 |
2 |
30 |
seed |
<0.05 |
||
|
0.018 |
0.034 |
2 |
30 |
|
<0.05 |
||
