BBCH-scale (currants)
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:
| class="wikitable" style="clear"
!Growth stage!!Code!!Description | |
| rowspan="5" style="vertical-align:top"|0: Sprouting/Bud development
|00 | Dormancy: leaf buds and the thicker inflorescence buds closed and covered by dark brown scales |
| 01From terminal bud. | 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 |
| rowspan="4" style="vertical-align:top"|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 |
| rowspan="5" style="vertical-align:top"|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 |
| rowspan="7" style="vertical-align:top"|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 |
| rowspan="5" style="vertical-align:top"|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 |
| rowspan="9" style="vertical-align:top"|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 |
| rowspan="4" style="vertical-align:top"|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) |
| rowspan="6" style="vertical-align:top"|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
{{reflist}}
References
- {{cite journal
| last = Meier
| first = U.
|author2=H. Graf |author3=M. Hess |author4=W. Kennel |author5=R. Klose |author6=D. Mappes |author7=D. Seipp |author8=R. Stauss |author9=J. Streif |author10=T. van den Boom
| title = 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.).
| journal = Nachrichtenbl. Deut. Pflanzenschutzd.
| volume = 46
| pages = 141–153
| date = 1994
}}