Potato Growth Stage

POTATOES

Growth stage Code Description
  2 digit 3 digit  
0: Sprouting/Germination
  00 000 Innate of enforced dormancy, Dry seed tuber not sprouted
  01 001 Beginning of sprouting: Beginning of sprouts visible (<1mm) seed
imbibition
  02 002 Sprouts upright (<2mm)
  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: stems break through soil surface; cotyledons break through
soil surface
  021-0291    
1: Leaf development
  10 100 From tuber: first leaves begin to extend
      From seed: cotyledons completely unfolded
  11 101 First leaf of main stem unfolded (>4cm)
  12 102 Second leaf of main stem unfolded (>4cm)
  13 103 Third leaf main stem unfolded (>4cm)
  1 10 Stages continuous still
  19 109 Nine or more leaves of main stem unfolded (>4cm)(2 digit);
  9   2 leaves of main stem unfolded (>4cm)(3 digit)
    110 Tenth leaf of main stem unfolded (>4cm)
  11   Stages continuous still
    119 Nineteenth leaf of main stem unfolded (>4cm)
    121 First leaf of second order branch above first inflorescence unfolded
(>4cm)
    122 Second leaf of second order branch above first inflorescence unfolded
(>4cm)
  12   Stages continuous still
    131 First leaf of of third order branch above second inflorescence unfolded
(>4cm)
    132 Second leaf of third order branch above second inflorescence unfolded
(>4cm)
  13   Stages continuous still
  1NX   Xth leaf of nth order branch above (n-1)th inflorescence unfolded
(>4cm)
2: Formation of basal side shoots below and above soil surface (main stem)
  21 201 First basal side shoot visible (>5cm)
  22 202 Second basal side shoot visible (>5cm)
  23 203 Third basal side shoot visible (>5cm)
  2 20 Stages continuous still
  29 209 Nine or more basal side shoots visible (>5cm)
3: Main stem elongation (crop cover)
  31 301 Beginning of crop cover: 10% of plants meet between rows
  32 302 20% of plants meet between rows
  33 303 30% of plants meet between rows
  34 304 40% of plants meet between rows
  35 30 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
4: Tuber information
  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 detatch 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
5: Inflorescence (cyme) emergence
  51 501 First individual buds (1-2mm) of first inflorescence visible (main stem)
  55 505 Buds of first extended to 5mm
  59 509 First flower petals of first inflorescence visible
    521 Individual buds of second inflorescence visible (second order branch)
    525 Buds of second inflorescence extended to 5mm open (main stem)
    529 First flower petals of second inflorescence visible above sepals
    531 Individual buds of third inflorescence visible (third order branch)
    535 Buds of second inflorescence extended to 5mm
    539 First flower petals of second inflorescence visible 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
6: Flowering (continuation)
    621 Beginning of flowering: 10% of flowers in the second inflorescence open
(second order branch)
    625 Full flowering: 50% of flowers in the second inflorescence open
    629 End of flowering in the 2nd inflorescence
    631 Beginning of flowering: 10% of flowers in the second inflorescence open
(third order branch)
    635 Full flowering: 50% of the flowers in the third inflorescence open
    639 End of flowering in the third inflorescence
  6N.   Nth inflorescence flowering
  6N9.   End of flowering
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 still
    721 10% of berries in the second 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)
8:Ripening of fruit and seed
  81 801 Berries in the first fructification still green, seed light-coloured
(main stream)
  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 second fructification still green, seed light-coloured
(second order branch)
  8N.   Ripening of fruit and seed in nth fructification
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

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