BBCH-scale (pea)
In biology, the BBCH-scale for peas describes the phenological development of peas using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of peas are:
| class="wikitable" style="clear"
!Growth stage!!Code!!Description | |
| rowspan="7" style="vertical-align:top"|0: Germination
|00 | Dry seed |
| 01 | Beginning of seed imbibition |
| 03 | Seed imbibition complete |
| 05 | Radicle emerged from seed |
| 07 | Shoot breaking through seed coat |
| 08 | Shoot growing towards soil surface; hypocotyl arch visible |
| 09 | Emergence: shoot breaks through soil surface (“cracking stage”) |
| rowspan="6" style="vertical-align:top"|1: Leaf development
|10 | Pair of scale leaves visible |
| 11 | First true leaf (with stipules) unfolded or first tendril developed |
| 12 | 2 leaves (with stipules) unfolded or 2 tendrils developed |
| 13 | 3 leaves (with stipules) unfolded or 3 tendrils developed |
| 1 . | Stages continuous till ... |
| 19 | 9 or more leaves (with stipules) unfolded or 9 or more tendrils developed |
| rowspan="6" style="vertical-align:top"|3: Stem elongation (Main shoot)
|30 | Beginning of stem elongation |
| 31 | 1 visibly extended internode1 |
| 32 | 2 visibly extended internodes1 |
| 33 | 3 visibly extended internodes1 |
| 3 . | Stages continuous till ... |
| 39 | 9 or more visibly extended internodes1 |
| rowspan="3" style="vertical-align:top"|5: Inflorescence emergence
|51 | First flower buds visible outside leaves |
| 55 | First separated flower buds visible outside leaves but still closed |
| 59 | First petals visible, flowers still closed |
| rowspan="8" style="vertical-align:top"|6: Flowering
|60 | First flowers open (sporadically within the population) |
| 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 |
| 69 | End of flowering |
| rowspan="8" style="vertical-align:top"|7: Development of fruit
|71 | 10% of pods have reached typical length; juice exudes if pressed |
| 72 | 20% of pods have reached typical length; juice exudes if pressed |
| 73 | 30% of pods have reached typical length; juice exudes if pressed.Tenderometer value: 80 TE |
| 74 | 40% of pods have reached typical length; juice exudes if pressed.Tenderometer value: 95 TE |
| 75 | 50% of pods have reached typical length; juice exudes if pressed.Tenderometer value: 105 TE |
| 76 | 60% of pods have reached typical length; juice exudes if pressed.Tenderometer value: 115 TE |
| 77 | 70% of pods have reached typical length. Tenderometer value: 130 TE |
| 79 | Pods have reached typical size (green ripe); peas fully formed |
| rowspan="9" style="vertical-align:top"|8: Ripening of fruit and seed
|81 | 10% of pods ripe, seeds final colour, dry and hard |
| 82 | 20% of pods ripe, seeds final colour, dry and hard |
| 83 | 30% of pods ripe, seeds final colour, dry and hard |
| 84 | 40% of pods ripe, seeds final colour, dry and hard |
| 85 | 50% of pods ripe, seeds final colour, dry and hard |
| 86 | 60% of pods ripe, seeds final colour, dry and hard |
| 87 | 70% of pods ripe, seeds final colour, dry and hard |
| 88 | 80% of pods ripe, seeds final colour, dry and hard |
| 89 | Fully ripe: all pods dry and brown. Seeds dry and hard (dry ripe) |
| rowspan="2" style="vertical-align:top"|9: Senescence
|97 | Plants dead and dry |
| 99 | Harvested product |
1 The first internode extends from the scale leaf node to the first true leaf node
References
- {{cite journal
| last = Feller
| first = C.
|author2=H. Bleiholder |author3=L. Buhr |author4=H. Hack |author5=M. Hess |author6=R. Klose |author7=U. Meier |author8=R. Stauss |author9=T. van den Boom |author10=E. Weber
| title = Phänologische Entwicklungsstadien von Gemüsepflanzen: II. Fruchtgemüse und Hülsenfrüchte. Nachrichtenbl. Deut.
| journal = Pflanzenschutzd.
| volume = 47
| pages = 217–232
| date =
}}
- {{cite journal
| last = Weber
| first = E.
|author2=H. Bleiholder
| title = Erläuterungen zu den BBCH-Dezimal-Codes für die Entwicklungsstadien von Mais, Raps, Faba-Bohne, Sonnenblume und Erbse - mit Abbildungen.
| journal = Gesunde Pflanzen
| volume = 42
| pages = 308–321
| year = 1990
}}