Oilseed Rape Growth

Oilseed Rape

Growth Stages Decimal Description
GS 0: Germination 00 Dry seed
  01 Beginning of seed imbibition
  02  
  03 Seed imbibition complete
  04  
  05 Radicle emerged from seed
  06  
  07 Hypocotyl with cotyledons emerged from seed
  08 Hypocotyl with cotyledons growing towards soil surface
  09 Emergence: cotyledons emerge through soil surface
  10 Cotyledons completely unfolded
  11 First leaf unfolded
GS 1: Leaf development    
  12 2 leaves unfolded
  13 3 leave unfolded
  14 4 leaves unfolded
  15 5 leaves unfolded
  16 6 leaves unfolded
  17 7 leaves unfolded
  18 8 leaves unfolded
  19 9 or more leaves unfolded
GS 2: Formation of side shoots:    
  20 No side shoots
  21 Beginning of side shoot development: first side shoot detectable
  22 2 side shoots detectable
  23 3 side shoots detectable
  24 4 side shoots detectable
  25 5 side shoots detectable
  26 6 side shoots detectable
  27 7 side shoots detectable
  28 8 side shoots detectable
  29 End of side shoot development. 9 or more side shoots detectable
GS 3: Stem elongation    
  30 Beginning of stem elongation: no internodes (‘rosette’)
  31 1 visibly extended internode
  32 2 visibly extended internode
  33 3 visibly extended internode
  34 4 visibly extended internode
  35 5 visibly extended internode
  36 6 visibly extended internode
  37 7 visibly extended internode
  38 8 visibly extended internode
  39 9 or more visibly extended internodes
GS 5: Stem elongation    
  50 Flower buds present, still enclosed by leaves
  51 Flower buds visible from above (‘green bud’)
  52 Flower buds free, level with the youngest leaves
  53 Flower buds raised above the youngest leaves
  54 Individual flower buds (main inflorescence) visible but still closed
  55  
  56  
  57 Individual flower buds (secondary inflorescence) visible but still closed
  58  
  59 First petals visible, flower buds still closed (‘yellow bud’)
GS 6: Flowering    
  60 First flowers open
  61 10% of flowers on main raceme open, main raceme elongating
  62 20% of flowers on main raceme open
  63 30% of flowers on main raceme open
  64 40% of flowers on main raceme open
  65 Full flowering: 50% of flowers on main raceme open, older petals falling
  66  
  67 Flowering declining: majority of petals fallen
  68  
  69 End of flowering
GS 7: Development of fruit    
  70  
  71 10% of pods have reached final size
  72  
  73 30% of pods have reached final size
  74  
  75 50% of pods have reached final size
  76  
  77 70% of pods have reached final size
  78  
  79 Nearly all pods have reached final size
GS 8: Ripening    
  80 Beginning of ripening: seed green, filling pod cavity
  81 10% of pods ripe, seeds black and hard
  82 20% of pods ripe, seeds black and hard
  83 30% of pods ripe, seeds black and hard
  84 40% of pods ripe, seeds black and hard
  85 50% of pods ripe, seeds black and hard
  86 60% of pods ripe, seeds black and hard
  87 70% of pods ripe, seeds black and hard
  88 88% of pods ripe, seeds black and hard
  89 Fully ripe: nearly all pods ripe, seeds black and hard
GS 9: Senescence    
  97 Plant dead and dry
  99 Harvested product

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