BBCH-scale (cucurbit)

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In biology, the BBCH-scale for cucurbits describes the phenological development of cucurbits, such as cucumber, melon, pumpkin, marrow, squash, calabash and watermelon, using the BBCH-scale.

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

Growth stage Code Description
2 digits 3 digits
0: Germination 00 000 Dry seed
01 001 Beginning of seed imbibition
03 003 Seed imbibition complete
05 005 Radicle emerged from seed
07 007 Hypocotyl with cotyledons breaking through seed coat
09 009 Emergence: cotyledons break through soil surface
1: Leaf development 10 100 Cotyledons completely unfolded
11 101 First true leaf on main stem fully unfolded
12 102 2nd true leaf on main stem unfolded
13 103 3rd true leaf on main stem unfolded
1 . 10 . Stages continuous till . . .
19 109 9 or more leaves on main stem unfolded (2digit)

9th leaf unfolded on main stem (3digit)

110 10th leaf on main stem unfolded
11 . Stages continuous till . . .
119 19th leaf on main stem unfolded
2: Formation of side shoots 21 201 First primary side shoot visible
22 202 2nd primary side shoot visible
2 . 20 . Stages continuous till . . .
29 209 9 or more primary side shoots visible
221 First secondary side shoot visible
22 . Stages continuous till . . .
229 9th secondary side shoot visible
231 First tertiary side shoot visible
5: Inflorescence emergence 51 501 First flower initial with elongated ovary visible on main stem
52 502 2nd flower initial with elongated ovary visible on main stem
53 503 3rd flower initial with elongated ovary visible on main stem
5 . 50 . Stages continuous till . . .
59 509 9 or more flower initials with elongated ovary already visible on main stem
510 10 or more flower initials with elongated ovary already visible on main stem
51 . Stages continuous till . . .
519 19 ore more flower initials with elongated ovary already visible on main stem
521 First flower initial visible on a secondary side shoot
531 First flower initial visible on a tertiary side shoot
6: Flowering 61 601 First flower open on main stem
62 602 2nd flower open on main stem
63 603 3rd flower open on main stem
6 . 60 . Stages continuous till . . .
69 609 9th flower open on main stem or 9 flowers on main stem already open
610 10th flower open on main stem or 10 flowers on main stem already open
61 . Stages continuous till . . .
619 19th flower open on man stem ore more than 19 flowers on main stem already open
621 First flower on secondary side shoot open
631 First flower on tertiary side shoot open
7: Development of fruit 71 701 First fruit on main stem has reached typical size and form
72 702 2nd fruit on main stem has reached typical size and form
73 703 3rd fruit on main stem has reached typical size and form
7 . 70 . Stages continuous till . . .
79 709 9 or more fruits on main stem has reached typical size and form
721 First fruit on a secondary side shoot has reached typical size and form
731 First fruit on a tertiary side shoot has reached typical size and form
8: Ripening of fruit and seed 81 801 10% of fruits show typical fully ripe colour
82 802 20% of fruits show typical fully ripe colour
83 803 30% of fruits show typical fully ripe colour
84 804 40% of fruits show typical fully ripe colour
85 805 50% of fruits show typical fully ripe colour
86 806 60% of fruits show typical fully ripe colour
87 807 70% of fruits show typical fully ripe colour
88 808 80% of fruits show typical fully ripe colour
89 809 Fully ripe: fruits have typical fully ripe colour
9: Senescence 97 907 Plants dead
99 909 Harvested product (seeds)

References[edit]

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.