Growth Stages in Cereals |
The descriptions of the growth stages of the Zadoks
decimal code for cereals.
| 0 |
Germination |
5 |
Inflorescence (ear/panicle) emergence |
| 00 |
Dry seed |
50 |
-- |
| 01 |
Start of imbibition (water absorption) |
51 |
First spikelet of inflorescence just visible |
| 02 |
-- |
52 |
-- |
| 03 |
Imbibition complete |
53 |
1/4 of inflorescence emerged |
| 04 |
-- |
54 |
-- |
| 05 |
Radicle (root) emerged from caryopsis (seed) |
55 |
1/2 of inflorescence emerged |
| 06 |
-- |
56 |
-- |
| 07 |
Coleoptile |
57 |
3/4 of inflorescence emerged |
| 08 |
-- |
58 |
-- |
| 09 |
Leaf just at coleoptile tip |
59 |
Emergence of inflorescence |
| 1 |
Seedling growth |
6 |
Anthesis (flowering) |
| 10 |
First leaf through coleoptile |
60 |
-- |
| 11 |
First leaf unfolded |
61 |
Beginning of anthesis |
| 12 |
2 leaves unfolded |
62 |
-- |
| 13 |
3 leaves unfolded |
63 |
-- |
| 14 |
4 leaves unfolded |
64 |
-- |
| 15 |
5 leaves unfolded |
65 |
Anthesis half-way |
| 16 |
6 leaves unfolded |
66 |
-- |
| 17 |
7 leaves unfolded |
67 |
-- |
| 18 |
8 leaves unfolded |
68 |
-- |
| 19 |
9 or more leaves unfolded |
69 |
Anthesis complete |
| 2 |
Tillering |
7 |
Milk development |
| 20 |
Main shoot only |
70 |
-- |
| 21 |
Main shoot and 1 tiller |
71 |
Caryopsis (kernel) water ripe |
| 22 |
Main shoot and 2 tillers |
72 |
-- |
| 23 |
Main shoot and 3 tillers |
73 |
Early milk |
| 24 |
Main shoot and 4 tillers |
74 |
-- |
| 25 |
Main shoot and 5 tillers |
75 |
Medium milk |
| 26 |
Main shoot and 6 tillers |
76 |
-- |
| 27 |
Main shoot and 7 tillers |
77 |
Late milk |
| 28 |
Main shoot and 8 tillers |
78 |
-- |
| 29 |
Main shoot and 9 or more tillers |
79 |
-- |
| 3 |
Stem elongation |
8 |
Dough development |
| 30 |
Pseudostem (leaf sheath) erection |
80 |
-- |
| 31 |
First node detectable |
81 |
-- |
| 32 |
2nd node detectable |
82 |
-- |
| 33 |
3rd node detectable |
83 |
Early dough |
| 34 |
4th node detectable |
84 |
-- |
| 35 |
5th node detectable |
85 |
Soft dough |
| 36 |
6th node detectable |
86 |
|
| 37 |
Flag leaf just visible |
87 |
Hard dough |
| 38 |
-- |
88 |
-- |
| 39 |
Flag leaf ligule just visible |
89 |
-- |
| 4 |
Booting |
9 |
Ripening |
| 40 |
-- |
90 |
-- |
| 41 |
Flag leaf sheath extending |
91 |
Caryopsis hard (difficult to divide) |
| 42 |
-- |
92 |
Caryopsis hard (not dented by thumbnail) |
| 43 |
Boots just visibly swollen |
93 |
Caryopsis loosening in daytime |
| 44 |
-- |
94 |
Over-ripe, straw dead and collapsing |
| 45 |
Boots swollen |
95 |
Seed dormant |
| 46 |
-- |
96 |
Viable seed giving 50% germination |
| 47 |
Flag leaf sheath opening |
97 |
Seed not dormant |
| 48 |
-- |
98 |
Secondary dormancy induced |
| 49 |
First awns visible |
99 |
Secondary dormancy lost |
| Growth Stages |
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