Mushrooms (Table 25). Uses exist in Belgium (3 kg ai/ha, 14-day PHI) and Italy (1 x 4.8-6 kg ai/ha, 45-day PHI). In a trial with 4 replicates on cultivated mushrooms in The Netherlands the residues were all <0.05 mg/kg 25 days after applying 2 x 4.9 mg/kg.
In Germany, wild mushrooms may be treated unintentionally by the use of teflubenzuron in forests against larvae of tenthredinidae spp. and free-eating caterpillars at 0.023 kg ai/ha. The worst case was simulated by the application of approximately twice this rate (0.045 kg ai/ha) in 3 trials in Germany. The residues on days 0, 1 and 2 were all <0.05 mg/kg in two trials and 0.07, 0.07 and 0.05 mg/kg respectively in the third.
Table 25. Residues of teflubenzuron in mushrooms from supervised trials. Whole mushrooms analysed.
|
Country, year |
Application |
PHI, days |
Residues, mg/kg |
Report No. |
|||
|
kg ai/hl |
kg ai/ha |
No. |
|||||
|
Wild mushrooms |
|||||||
|
Germany, 1984
|
0.004
|
0.045
|
1
|
0 |
0.07 |
C 84090401
|
|
|
1 |
0.07 |
||||||
|
2 |
0.05 |
||||||
|
7 |
<0.05 |
||||||
|
14 |
<0.05 |
||||||
|
Germany, 1984
|
0.004
|
0.045
|
1 |
0 |
<0.05 |
C 84090402
|
|
|
1 |
<0.05 |
||||||
|
2 |
<0.05 |
||||||
|
7 |
<0.05 |
||||||
|
14 |
<0.05 |
||||||
|
Germany, 1985
|
0.045
|
0.045
|
1 |
0 |
<0.05 |
C 851603
|
|
|
1 |
<0.05 |
||||||
|
2 |
<0.05 |
||||||
|
7 |
<0.05 |
||||||
|
14 |
<0.05 |
||||||
|
Cultivated mushrooms |
|||||||
|
Netherlands, 1987
|
0.16
|
4.9
|
2
|
25 |
<0.05 |
87-139
|
|
|
25 |
<0.05 |
||||||
|
25 |
<0.05 |
||||||
|
25 |
<0.05 |
||||||
Chinese cabbage (Table 26). Teflubenzuron is currently registered only in The Netherlands. It is recommended for field use at a rate of 0.06 kg ai/ha 2-4 times a season with a PHI of 14 days.
Two trials were carried out in The Netherlands. After applying 1 x 0.06 or 0.09 kg ai/ha the residues were 0.22 and 0.31 mg/kg at day 14.
Further trials were conducted in Malaysia (4 x 0.045 kg ai/ha) and the Philippines (9 x 0.045 kg ai/ha). The residues were 0.16, 0.93 and 2.8 mg/kg 7 days after treatment. No GAP was available for Asian countries with which to evaluate the results.
Table 26. Residues of teflubenzuron in Chinese cabbage from supervised trials.
|
Country, year |
Application |
PHI, days |
Residues, mg/kg |
Report No. |
||
|
kg ai/hl |
kg ai/ha |
No. |
||||
|
Netherlands, 1986
|
0.006 |
0.06 |
1 |
1 |
2 |
86.158A
|
|
|
|
|
14 |
0.22 |
||
|
|
|
|
21 |
0.06 |
||
|
Netherlands, 1986
|
0.009 |
0.09 |
1 |
1 |
3.2 |
86.158B
|
|
|
|
|
14 |
0.31 |
||
|
|
|
|
21 |
0.1 |
||
|
Malaysia, 1985 |
0.004 |
0.045 |
4 |
7 |
0.93 |
MYS85I01002 |
|
Malaysia, 1985 |
0.007 |
0.045 |
4 |
7 |
2.3 |
MYS85I01001 |
|
Philippines, 1985
|
0.005 |
0.045 |
9 |
0 |
1.6 |
PHI85I00301
|
|
|
|
|
3 |
0.65 |
||
|
|
|
|
5 |
0.34 |
||
|
|
|
|
7 |
0,16 |
||
Peas. immature seeds (Table 27). No information on GAP was available for peas. One trial was conducted in France. The residues were 0.19 mg/kg in green peas with pods and <0.05 mg/kg in the peas 21 days after 2 applications of 0.045 kg ai/hl (0.23 kg ai/ha).
Table 27. Residues of teflubenzuron in peas from supervised trials in France, 1983.
|
Application |
PHI, days |
Sample |
Residues, mg/kg |
Report No. |
||
|
kg ai/hl |
kg ai/ha |
No. |
||||
|
0.045 |
0.22 |
2 |
21 |
peas with pod |
0.19 |
18353.34.01 |
|
21 |
seeds |
<0.05 |
||||
