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BBCH-scale (bean)




The BBCH-scale (bean) identifies the phenological development stages of the bean plant. It is a plant species version of the BBCH-scale.

A downloadable version [1] of the BBCH Scales, including illustrations, is available from the BBA [2] (Federal Biological Research Centre for Agriculture and Forestry)

Phenological growth stages and BBCH-identification keys of bean
Code Description
Principal growth stage 0: Germination
00 Dry seed
01 Beginning of seed imbibition
03 Seed imbibition complete
05 Radicle emerged from seed
07 Hypocotyl with cotyledons breaking through seed coat
08 Hypocotyl reaches the soil surface; hypocotyl arch visible
09 Emergence: hypocotyl with cotyledons break through soil surface (“cracking stage”)
Principal growth stage 1: Leaf development
10 Cotyledons completely unfolded
12 2 full leaves (first leaf pair unfolded)
13 3rd true leaf (first trifoliate leaf) unfolded
1 . Stages continuous till . . .
19 9 or more leaves (2 full leaves, 7 or more trifoliate) unfolded
Principal growth stage 2: Formation of side shoots
21 First side shoot visible
22 2nd side shoot visible
23 3rd side shoot visible
2 . Stages continuous till . . .
29 9 or more side shoots visible
Principal growth stage 5: Inflorescence emergence
51 First flower buds visible
55 First flower buds enlarged
59 First petals visible, flowers still closed
Principal growth stage 6: Flowering
60 First flowers open (sporadically within the population)
61 Beginning of flowering: 10% of flowers open1

Beginning of flowering2

62 20% of flowers open1
63 30% of flowers open1
64 40% of flowers open1
65 Full flowering: 50% of flowers open1

Main flowering period2

67 Flowering finishing: majority of petals fallen or dry1
69 End of flowering: first pods visible1
Principal growth stage 7: Development of fruit
71 10% of pods have reached typical length1

Beginning of pot development2

72 20% of pods have reached typical length1
73 30% of pods have reached typical length1
74 40% of pods have reached typical length1
75 50% of pods have reached typical length,

beans beginning to fill out1 Main pod development period2

76 60% of pods have reached typical length1
77 70% of pods have reached typical length, pods still break cleanly1
78 80% of pods have reached typical length1
79 Pods: individual beans easily visible1
Principal growth stage 8: Ripening of fruit and seed
81 10% of pods ripe (beans hard)1

Seeds beginning to mature2

82 20% of pods ripe (beans hard)1
83 30% of pods ripe (beans hard)1
84 40% of pods ripe (beans hard)1
85 50% of pods ripe (beans hard)1

Main period of ripening2

86 60% of pods ripe (beans hard)1
87 70% of pods ripe (beans hard)1
88 80% of pods ripe (beans hard)1
89 Fully ripe: pods ripe (beans hard)1
Principal growth stage 9: Senescence
97 Plants dead
99 Harvested product

1 For varieties with limited flowering period
2 For varieties in which the flowering period is not limited

References

Feller, C.; H. Bleiholder, L. Buhr, H. Hack, M. Hess, R. Klose, U. Meier, R. Stauss, T. van den Boom, E. Weber (1995). "Phänologische Entwicklungsstadien von Gemüsepflanzen: II. Fruchtgemüse und Hülsenfrüchte. Nachrichtenbl. Deut.". Pflanzenschutzd. 47: 217-232.

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "BBCH-scale_(bean)". A list of authors is available in Wikipedia.
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