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BBCH-scale (potato)



The BBCH-scale (potato) identifies the phenological development stages of potato (Solanum tuberosum). It is a plant species specific version of the BBCH-scale.

Phenological growth stages and BBCH-identification keys of potato from tuber seed
Code (2-digit) Code (3-digit) Description
Principal growth stage 0: Sprouting/Germination
00 000 Innate or enforced dormancy, Dry seed tuber not sprouted
01 001 Beginning of sprouting: Beginning of sprouts visible (< 1 mm) seed imbibition
02 002 Sprouts upright (< 2 mm)
03 003 End of dormancy: sprouts 2–3 mm Seed imbibition complete
05 005 Beginning of root formation Radicle (root) emerged from seed
07 007 Beginning of stem formation Hypocotyl with cotyledons breaking
08 008 Stems growing towards soil surface, Hypocotyl with formation of scale leaves in the axils cotyledons growing of which stolons will develop later towards soil surface
09 009 Emergence: Emergence: stems break through soil surface cotyledons break through soil surface
021–0291
Principal growth stage 1: Leaf development
10 100 From tuber: first leaves begin to extend

From seed: cotyledons completely unfolded

11 101 1st leaf of main stem unfolded (> 4 cm)
12 102 2nd leaf of main stem unfolded (> 4 cm)
13 103 3rd leaf Auf main stem unfolded (> 4 cm)
1 . 10 . Stages continuous till . . .
19 109 9 or more leaves of main stem unfolded (> 4cm) (2digit);2

9 leaves of main stem unfolded (> 4 cm) (3digit)

110 10th leaf of main stem unfolded (> 4 cm)
11 . Stages continuous till . . .
119 19.leaf of main stem unfolded (> 4 cm)
121 First leaf of 2nd order branch above first inflorescence unfolded (> 4 cm)
122 2nd leaf of 2nd order branch above first inflorescence unfolded (> 4 cm)
12 . Stages continuous till . . .
131 First leaf of 3rd order branch above 2nd inflorescence unfolded (> 4 cm)
132 2nd leaf of 3rd order branch above 2nd inflorescence unfolded (> 4 cm)
13 . Stages continuous till . . .
1NX Xth leaf of nth order branch above n-1th inflorescence unfolded (> 4 cm)
Principal growth stage 2: Formation of basal side shoots below and above soil surface (main stem)
21 201 First basal side shoot visible (> 5 cm)
22 202 2nd basal side shoot visible (> 5 cm)
23 203 3rd basal side shoot visible (> 5 cm)
2 . 20 . Stages continuous till . . .
29 209 9 or more basal side shoots visible (> 5 cm)
Principal growth stage 3: Main stem elongation (crop cover)
31 301 Beginning of crop cover: 10% of plants meet between rows
32 302 20% off plants meet between rows
33 303 30% of plants meet between rows
34 304 40% of plants meet between rows
35 305 50% of plants meet between rows
36 306 60% of plants meet between rows
37 307 70% of plants meet between rows
38 308 80% of plants meet between rows
39 309 Crop cover complete: about 90% of plants meet between rows
Principal growth stage 4: Tuber formation
40 400 Tuber initiation: swelling of first stolon tips to twice the diameter of subtending stolon
41 401 10% of total final tuber mass reached
42 402 20% of total final tuber mass reached
43 403 30% of total final tuber mass reached
44 404 40% of total final tuber mass reached
45 405 50% of total final tuber mass reached
46 406 60% of total final tuber mass reached
47 407 70% of total final tuber mass reached
48 408 Maximum of total tuber mass reached, tubers detach easily from stolons, skin set not yet complete (skin easily removable with thumb)
49 409 Skin set complete: (skin at apical end of tuber not removable with thumb) 95% of tubers in this stage
Principal growth stage 5: Inflorescence (cyme) emergence
51 501 First individual buds (1–2 mm) of first inflorescence visible (main stem)
55 505 Buds of first inflorescence extended to 5 mm
59 509 First flower petals of first inflorescence visible
521 Individual buds of 2nd inflorescence visible (second order branch)
525 Buds of 2nd inflorescence extended to 5 mm open (main stem)
529 First flower petals of 2nd inflorescence visible above sepals
531 Individuell buds of 3rd inflorescence visible(3rd order branch)
535 Buds of 3rd inflorescence extended to 5 mm
539 First flower petals of 3rd inflorescence visible above sepals
5N . Nth inflorescence emerging
60 600 First open flowers in population
61 601 Beginning of flowering: 10% of flowers in the first inflorescence open (main stem)
62 602 20% of flowers in the first inflorescence open
63 603 30% of flowers in the first inflorescence open
64 604 40% of flowers in the first inflorescence open
65 605 Full flowering: 50% of flowers in the first inflorescence open
66 606 60% of flowers in the first inflorescence open
67 607 70% of flowers in the first inflorescence open
68 608 80% of flowers in the first inflorescence open
69 609 End of flowering in the first inflorescence
Principal growth stage 6: Flowering (continuation)
621 Beginning of flowering: 10% of flowers in the 2nd inflorescence open (second order branch)
625 Full flowering: 50% of flowers in the 2nd inflorescence open
629 End of flowering in the 2nd inflorescence
631 Beginning of flowering: 10% of flowers in the 3rd inflorescence open (third order branch)
635 Full flowering: 50% of flowers in the 3rd inflorescence open
639 End of flowering in the 3rd inflorescence
6N . Nth inflorescence flowering
6N9 End of flowering
Principal growth stage 7: Development of fruit
70 700 First berries visible
71 701 10% of berries in the first fructification have reached full size (main stem)
72 702 20% of berries in the first fructification have reached full size
73 703 30% of berries in the first fructification have reached full size
7 . 70 . Stages continuous till . . .
721 10% of berries in the 2nd fructification have reached full size (second order branch)
7N . Development of berries in nth fructification
7N9 Nearly all berries in the nth fructification have reached full size (or have been shed)
Principal growth stage 8: Ripening of fruit and seed
81 801 Berries in the first fructification still green, seed light-coloured (main stem)
85 805 Berries in the first fructification ochre-coloured or brownish
89 809 Berries in the first fructification shrivelled, seed dark
821 Berries in the 2nd fructification still green, seed light-coloured (second order branch)
8N . Ripening of fruit and seed in nth fructification
Principal growth stage 9: Senescence
91 901 Beginning of leaf yellowing
93 903 Most of the leaves yellowish
95 905 50% of the leaves brownish
97 907 Leaves and stem dead, stems bleached and dry
99 909 Harvested product

1 For second generation sprouts
2 Stem development stops after termination of main stem by an inflorescence. Branches arise from axils of upper leaves of the main stem, exhibiting a sympodial branching pattern

References

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "BBCH-scale_(potato)". A list of authors is available in Wikipedia.
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