BBCH-scale (pome fruit)
Appearance
In biology, the BBCH-scale for pome fruit describes the phenological development of fruits such as apples and pears using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of pome fruit 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 | Beginning of leaf bud swelling: buds visibly swollen, bud scales elongated, with light coloured patches | |
03 | End of leaf bud swelling: bud scales light coloured with some parts densely covered by hairs | |
07 | Beginning of bud break: first green leaf tips just visible | |
09 | Green leaf tips about 5 mm above bud scales | |
1: Leaf development | 10 | Mouse-ear stage: Green leaf tips 10 mm above the bud scales; first leaves separating |
11 | First leaves unfolded (others still unfolding) | |
15 | More leaves unfolded, not yet at 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 swelling: bud scales elongated, with light coloured patches |
52 | End of bud swelling: light coloured bud scales visible with parts densely covered by hairs | |
53 | Bud burst: green leaf tips enclosing flowers visible | |
54 | Mouse-ear stage: green leaf tips 10 mm above bud scales; first leaves separating | |
55 | Flower buds visible (still closed) | |
56 | Green bud stage: single flowers separating (still closed) | |
57 | Pink bud stage: flower petals elongating; sepals slightly open; petals just visible | |
59 | Most flowers with petals forming a hollow ball | |
6: Flowering | 60 | First flowers open |
61 | Beginning of flowering: about 10% of flowers open | |
62 | About 20% of flowers open | |
63 | About 30% of flowers open | |
64 | About 40% 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 | Fruit size up to 10 mm; fruit fall after flowering |
72 | Fruit size up to 20 mm | |
73 | Second fruit fall | |
74 | Fruit diameter up to 40 mm; fruit erect (T-stage: underside of fruit and stalk forming a T) | |
75 | Fruit about half final size | |
76 | Fruit about 60% final size | |
77 | Fruit about 70% final size | |
78 | Fruit about 80% final size | |
79 | Fruit about 90% final size | |
8: Maturity of fruit and seed | 81 | Beginning of ripening: first appearance of cultivar-specific colour |
85 | Advanced ripening: increase in intensity of cultivar-specific colour | |
87 | Fruit ripe for picking | |
89 | Fruit ripe for consumption: fruit have typical taste and firmness | |
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 | |
97 | All leaves fallen | |
99 | Harvested product |
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.