In biology, the BBCH-scale for peanut describes the phenological development of peanuts using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of peanuts are:
Growth stageCodeDescription0: Germination00 Dry seed01 Beginning of seed imbibition03 Seed imbibition complete05 Radicle emerged from seed07 Hypocotyl with cotyledons breaking through seed coat08 Hypocotyl reaches the soil surface; hypocotyl arch visible09 Emergence: hypocotyl with cotyledons arising above soil surface (“cracking stage”)1: Leaf development (main shoot)10 Cotyledons completely unfolded111 First true leaf (pinnate) unfolded112 2nd true leaf (pinnate) unfolded113 3rd true leaf (pinnate) unfolded11 . Stages continuous till ...19 9 or more true leaves unfolded.1 No side shoots visible22: Formation of side shoots321 1st side shoot visible22 2nd side shoot visible23 3rd side shoot visible2 . Stages continuous till ...29 9 or more side shoots visible3: Main stem elongation (Crop cover)31 Beginning of crop cover: 10% of plants meets between rows32 20% of plants meets between rows33 30% of plants meets between rows34 40% of plants meets between rows35 50% of plants meets between rows36 60% of plants meets between rows37 70% of plants meets between rows38 80% of plants meets between rows39 Crop cover complete: 90% of plants meets between rows5: Inflorescence emergence51 First inflorescence buds visible55 First individual flower buds visible59 First flower petals visible. Flower buds still closed6: Flowering61 Beginning of flowering62 First carpophore pegs visible63 Continuation of flowering64 First carpophore pegs visibly elongated65 Full flowering66 First carpophore pegs penetrating the soil67 Flowering declining468 Tip of first carpophore pegs growing horizontally in the soil69 End of flowering47: Development of fruits and seeds71 Beginning of pod development: tip of first carpophore pegs swollen (at least twice the original diameter)73 Continuation of pod development: beginning of pod filling: first pods have attained final size and are ripening75 Main phase of pod development: continuation of pod filling77 Advanced pod filling79 Fresh seeds fill the cavity of the pods which have attained their final size8: Ripening of fruits and seeds581 Beginning of ripening: about 10% of pods developed to final size are ripe82 About 20% of pods developed to final size are ripe83 Continuation of ripening: about 30% of pods developed to final size are ripe84 About 40% of pods developed to final size are ripe85 Main phase of ripening: about 50% of pods developed to final size are ripe86 About 60% of pods developed to final size are ripe87 Advanced ripening: about 70% of pods developed to final size are ripe88 About 80% of pods developed to final size are ripe89 Full maturity: nearly all pods developed to final size are ripe9: Senescence91 About 10% of above ground parts of plant dry92 About 40% of above ground parts of plant dry93 About 30% of above ground parts of plant dry94 About 40% of above ground parts of plant dry95 About 50% of above ground parts of plant dry96 About 60% of above ground parts of plant dry97 Above ground parts of plant dead99 Harvested product
1 Leaves are counted from the cotyledon node (= node 0) 2 Side shoot development may occur earlier; in this case continue with principal growth stage 2 4 Only for varieties with a determinate flowering period 5 Criteria of maturity: Pericarp hard, with distinct texture, can be split open easily;
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