7 C.F.R. § 201.61
Fluorescence percentages in ryegrasses.
Cite as 7 C.F.R. § 201.61 (2026)
Tolerances for 400-seed fluorescence tests shall be those set forth in the following table plus one-half the regular pure-seed tolerance determined in accordance with § 201.60. When only 200 seeds of a component in a mixture are tested, an additional 2 percent shall be added to the fluorescence tolerance.
Fluorescence Tolerance, Based on Test Fluorescence (TFL)
100
99
1.0
98
1.6
97
2.0
96
2.3
95
2.6
94
2.9
93
3.2
92
3.4
91
3.6
90
3.8
89
4.0
88
4.1
87
4.3
86
4.5
85
4.7
84
4.8
83
4.9
82
5.0
81
5.2
80
5.3
79
5.4
78
5.5
77
5.6
76
5.7
75
5.8
74
5.8
73
5.9
72
6.0
71
6.1
70
6.2
69
6.2
68
6.3
67
6.3
66
6.4
65
6.5
64
6.5
63
6.5
62
6.6
61
6.6
60
6.7
59
6.7
58
6.8
57
6.8
56
6.8
55
6.8
54
6.9
53
6.9
52
6.9
51
6.9
50
6.9
49
6.9
48
6.9
47
6.9
46
6.9
45
6.9
44
6.9
43
6.9
42
6.9
41
6.9
40
6.9
39
6.8
38
6.8
37
6.8
36
6.8
35
6.7
34
6.7
33
6.7
32
6.6
31
6.6
30
6.5
29
6.5
28
6.4
27
6.4
26
6.3
25
6.2
24
6.2
23
6.1
22
6.0
21
5.9
20
5.8
19
5.7
18
5.6
17
5.5
16
5.4
15
5.3
14
5.2
13
5.0
12
4.9
11
4.7
10
4.6
9
4.4
8
4.2
7
4.0
6
3.7
5
3.5
4
3.2
3
2.8
2
2.4
1
1.8
0
1.0
[32 FR 12781, Sept. 6, 1967, as amended at 59 FR 64516, Dec. 14, 1994; 85 FR 40583, July 7, 2020]
- Cross-references to the CFR
- 201.60.