Journal of Tea Science Research. 2015, Vol. 5, No. 9, 1-7
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Table 1 Meteorological data for wet season at Gudalur
Table 2 Residues of bifenthrin in black tea at wet (W) and dry (D) seasons
Day
Control
Residues of bifenthrin (mg kg
-1
)*
@ 1000 ml
@ 2000 ml
W
D
W
D
0
ND
36.67
18.50
67.38
34.38
1
ND
6.74
17.20
11.38
33.11
3
ND
1.87
10.86
4.02
20.61
5
ND
1.04
6.27
3.13
9.96
7
ND
0.64
4.76
2.92
7.62
10
ND
0.47
2.07
1.32
5.61
14
ND
0.33
0.69
0.68
1.63
ND – non detectable; * dry weight basis
Day from
Spraying
Temp
o
C
RH %
Rainfall
(mm/day)
Sunshine
(h/day)
Min.
Max.
At 0830 h
At 1430 h
-3
18.6
28.0
88
75
6.8
3.1
-2
20.1
26.5
91
80
1.2
0.28
-1
19.6
26.0
84
74
NIL
3.5
0
*
16.2
26.7
86
66
15.00
2.55
1
19.5
27.6
84
76
46.00
3.3
2
16.5
27.2
81
90
17.00
2.2
3
20.5
26.5
87
74
23.00
3.55
4
18.5
27.4
86
70
NIL
8.05
5
17.1
28.5
72
62
36.00
4.10
6
15.5
28.4
77
48
29.00
6.10
7
17.1
29.0
60
42
11.00
2.35
8
15.6
30.0
67
48
NIL
9.3
9
15.6
30.0
60
50
17.00
4.4
10
14.1
28.5
53
64
55.00
3.6
11
18.5
30.2
79
84
NIL
5.0
12
19.3
28.7
78
90
10.00
4.45
13
17.1
28.0
84
70
47.00
3.3
14
17.1
27.5
76
75
7.60
3.35
