BBCH-scale (cucurbit)

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 cucurbits are:

Growth stageCodeDescription
2 digits3 digits
0: Germination 00000Dry seed
01001Beginning of seed imbibition
03003Seed imbibition complete
05005Radicle emerged from seed
07007Hypocotyl with cotyledons breaking through seed coat
09009Emergence: cotyledons break through soil surface
1: Leaf development 10100Cotyledons completely unfolded
11101First true leaf on main stem fully unfolded
121022nd true leaf on main stem unfolded
131033rd true leaf on main stem unfolded
1 .10 .Stages continuous till ...
191099 or more leaves on main stem unfolded (2digit)

9th leaf unfolded on main stem (3digit)

11010th leaf on main stem unfolded
11 .Stages continuous till ...
11919th leaf on main stem unfolded
2: Formation of side shoots 21201First primary side shoot visible
222022nd primary side shoot visible
2 .20 .Stages continuous till ...
292099 or more primary side shoots visible
221First secondary side shoot visible
22 .Stages continuous till ...
2299th secondary side shoot visible
231First tertiary side shoot visible
5: Inflorescence emergence 51501First flower initial with elongated ovary visible on main stem
525022nd flower initial with elongated ovary visible on main stem
535033rd flower initial with elongated ovary visible on main stem
5 .50 .Stages continuous till ...
595099 or more flower initials with elongated ovary already visible on main stem
51010 or more flower initials with elongated ovary already visible on main stem
51 .Stages continuous till ...
51919 ore more flower initials with elongated ovary already visible on main stem
521First flower initial visible on a secondary side shoot
531First flower initial visible on a tertiary side shoot
6: Flowering 61601First flower open on main stem
626022nd flower open on main stem
636033rd flower open on main stem
6 .60 .Stages continuous till ...
696099th flower open on main stem or 9 flowers on main stem already open
61010th flower open on main stem or 10 flowers on main stem already open
61 .Stages continuous till ...
61919th flower open on man stem ore more than 19 flowers on main stem already open
621First flower on secondary side shoot open
631First flower on tertiary side shoot open
7: Development of fruit 71701First fruit on main stem has reached typical size and form
727022nd fruit on main stem has reached typical size and form
737033rd fruit on main stem has reached typical size and form
7 .70 .Stages continuous till ...
797099 or more fruits on main stem has reached typical size and form
721First fruit on a secondary side shoot has reached typical size and form
731First fruit on a tertiary side shoot has reached typical size and form
8: Ripening of fruit and seed 8180110% of fruits show typical fully ripe colour
8280220% of fruits show typical fully ripe colour
8380330% of fruits show typical fully ripe colour
8480440% of fruits show typical fully ripe colour
8580550% of fruits show typical fully ripe colour
8680660% of fruits show typical fully ripe colour
8780770% of fruits show typical fully ripe colour
8880880% of fruits show typical fully ripe colour
89809Fully ripe: fruits have typical fully ripe colour
9: Senescence 97907Plants dead
99909Harvested product (seeds)

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.
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