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BBCH-scale (beet)




The BBCH-scale (beet) identifies the phenological development stages of the beet 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 beet

Code Description
Principal growth stage 0: Germination
00 Dry seed
01 Beginning of imbibition: seeds begins to take up water
03 Seed imbibition complete (pellet cracked)
05 Radicle emerged from seed (pellet)
07 Shoot emerged from seed (pellet)
09 Emergence: shoot emerges through soil surface
Principal growth stage 1: Leaf development (youth stage)
10 First leaf visible (pinhead-size): cotyledons horizontally unfolded
11 First pair of leaves visible, not yet unfolded (pea-size)
12 2 leaves (first pair of leaves) unfolded
14 4 leaves (2nd pair of leaves) unfolded
15 5 leaves unfolded
1 . Stages continuous till . . .
19 9 and more leaves unfolded
Principal growth stage 3: Rosette growth (crop cover)
31 Beginning of crop cover: leaves cover 10% of ground
32 Leaves cover 20% of ground
33 Leaves cover 30% of ground
34 Leaves cover 40% of ground
35 Leaves cover 50% of ground
36 Leaves cover 60% of ground
37 Leaves cover 70% of ground
38 Leaves cover 80% of ground
39 Crop cover complete: leaves cover 90% of ground
49 Beet root has reached harvestable size
Principal growth stage 5: Inflorescence emergence (2nd year of growth)
51 Beginning of elongation of main stem
52 Main stem 20 cm long
53 Side shoot buds visible on main stem
54 Side shoots clearly visible on main stem
55 First individual flower buds on side shoots visible
59 First bracts visible; flower buds still closed
Principal growth stage 6: Flowering
60 First flowers open
61 Beginning of flowering: 10% of flowers open
62 20% of flowers open
63 30% of flowers open
64 40% of flowers open
65 Full flowering: 50% of flowers open
67 Flowering declining: 70% of flowers open or dry
69 End of flowering: all flowers dry, fruit set visible
Principal growth stage 7: Development of fruit
71 Beginning of seed development: seeds visible in infructescence
75 Pericarp green; fruit still mouldable; perisperm milky; colour of seed coat: beige
Principal growth stage 8: Ripening
81 Beginning of ripening: pericarp green-brown, seed coat light brown
85 Pericarp light brown, seed coat reddish brown
87 Pericarp hard, seed coat dark brown
89 Fully ripe: seed coat final colour (specific to variety and species), perisperm hard
Principal growth stage 9: Senescence
91 Beginning of leaf discolouration
93 Most leaves yellowish
95 50% of leaves brownish
97 Leaves dead
99 Harvested product (seeds)

References

Meier, U.; L. Bachmann, H. Buhtz, H. Hack, R. Klose, B. Marlander, E. Weber (1993). "Phänologische Entwick-lungsstadien der Beta-Rüben (Beta vulgaris L. ssp.). Codierung und Beschreibung nach der erweiterten BBCH-Skala (mit Abbildungen).". Nachrichtenbl. Deut. Pflanzenschutzd. 45: 37-41.

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