BBCH-scale (currants)

From Wikipedia, the free encyclopedia
Jump to: navigation, search

In biology, the BBCH-scale for currants describes the phenological development of currants, such as blackcurrants and redcurrants, using the BBCH-scale.

The phenological growth stages and BBCH-identification keys of currants are:

Growth stage Code Description
0: Sprouting/Bud development 00 Dormancy: leaf buds and the thicker inflorescence buds closed and covered by dark brown scales
01[1] Beginning of bud swelling: bud scales elongated
03 End of bud swelling: edges of bud scales light coloured
07 Beginning of bud burst: first green or red leaf tips just visible
09 Leaf tips extended beyond scales
1: Leaf development 10 Leaf tips above the bud scales: first leaves separating
11 First leaves unfolded (others still unfolding)
15 More leaves unfolded, not yet full size
19 First leaves fully expanded
3: Shoot development1 31 Beginning of shoot growth: axes of developing shoots visible
32 Shoots about 20% of final length
33 Shoots about 30% of final length
3 . Stages continuous till . . .
39 Shoots about 90% of final length
5: Inflorescence emergence 51 Inflorescence buds and leaf buds swelling: buds closed, light brown scales visible
53 Bud burst: scales separated light green but sections visible
54 Green or red leaf tips above bud scales
55 First flower buds (compact raceme) visible beside unfolded leaves
56 Beginning of raceme elongation
57 First flower bud separated on elongating raceme
59 Grape stage: all flower buds separated
6: Flowering 60 First flowers open
61 Beginning of flowering: about 10% of flowers open
65 Full flowering: at least 50% of flowers open, first petals falling
67 Flowers fading: majority of petals fallen
69 End of flowering: all petals fallen
7: Development of fruit 71 Beginning of fruit growth: first fruits visible at raceme base
72 20% of fruits formed
73 30% of fruits formed
74 40% of fruits formed
75 50% of fruits formed
76 60% of fruits formed
77 70% of fruits formed
78 80% of fruits formed
79 90% of fruits formed
8: Maturity of fruit and seed 81 Beginning of ripening: change to cultivar-specific fruit color
85 Advanced ripening: first berries at base of racemes have cultivar-specific color
87 Fruit ripe for picking: most berries ripe
89 Berries at base of racemes tending to drop (beginning of fruit abscission)
9: Senescence, beginning of dormancy 91 Shoot growth completed; terminal bud developed; foliage still fully green
92 Leaves begin to discolour
93 Beginning of leaf fall
95 50% of leaves discoloured or fallen
97 All leaves fallen
99 Harvested product


Notes[edit]

  1. ^ From terminal bud.

References[edit]

Meier, U.; H. Graf; M. Hess; W. Kennel; R. Klose; D. Mappes; D. Seipp; R. Stauss; J. Streif; T. van den Boom (1994). "Phänologische Entwick-lungsstadien des Kernobstes (Malus domestica Borkh. und Pyrus communis L.), des Steinobstes (Prunus-Arten), der Johannisbeere (Ribes-Arten) und der Erdbeere (Fragaria x ananassa Duch.).". Nachrichtenbl. Deut. Pflanzenschutzd. 46: 141–153.