Vigna unguiculata
Enable an agent to recognise Vigna unguiculata, assess the condition and suitability of its plants or propagating material, and select cultivation, conservation or harvest actions appropriate to the identified population.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise Vigna unguiculata, assess the condition and suitability of its plants or propagating material, and select cultivation, conservation or harvest actions appropriate to the identified population.
Vigna unguiculata, commonly called cowpea, is a leguminous species in the family Fabaceae, cultivated chiefly in warm regions for its edible seeds, pods and leaves and for fodder.
It can be Identify or provisionally classify plants using documented diagnostic evidence.; Compare accessions or cultivars for a stated growing environment and intended harvested organ.; Schedule observations and cultivation actions from developmental stage and measured conditions.; Investigate poor growth by separating water stress, nutrition, nodulation and biotic damage.; Assess readiness for tender-pod, leaf, grain or seed harvest using purpose-specific criteria.; Evaluate and preserve seed lots while retaining identity, provenance and viability evidence..
Distinguishing features
Check a combination of vegetative, floral, pod and seed characters against a regional botanical key; trifoliate leaves or bean-shaped seeds alone do not establish species identity.
Treat a dark mark around the seed hilum as a descriptive character rather than a required identification test: the name black-eyed pea must not define the whole species.
Separate very long, vegetable-use pods from species-level identity; determine whether the material is a yardlong-bean cultivated group within Vigna unguiculata rather than a different species.
Distinguish an identified plant or accession from a commodity labelled cowpea, whose species, cultivar and viability may lack supporting evidence.
When distinguishing cowpea from other Vigna crops or Phaseolus beans, record the diagnostic characters actually observed and leave identification unresolved if reproductive material is missing.
Scope
+ Species identification and separation from other Vigna species and superficially similar legumes
+ Cultivar, cultivated-group and wild-population identity within the registered species
+ Plant architecture, development, flowering, pods and seed characteristics
+ Environmental response, root nodulation and crop health
+ Propagation, harvest readiness and conservation of reproductive material
- Other Vigna species and general legume biology as independent subjects
- Recipes, processed cowpea foods and dietary recommendations
- Farm businesses, land tenure and agricultural supply chains
- Fertiliser, pesticide and irrigation equipment specifications
- Rhizobial strains, pests and pathogens as independently modelled organisms
Characteristics
- Identification confidence
- unassessed | provisional | supported by diagnostic evidence | disputed Controls whether species-specific decisions are justified.
- Within-species identity
- Named cultivar, cultivated group, accession or wild population, with naming authority and evidence Pod use, growth habit and adaptation cannot be inferred reliably from the species name alone.
- Growth habit
- erect | spreading | trailing | climbing | unresolved; record support conditions Informs spacing, support, sampling and harvest access.
- Developmental stage
- seed | germinating | vegetative | flowering | pod filling | mature | senescent Makes health observations and proposed interventions interpretable.
- Flowering response
- Days from sowing to a stated flowering threshold, with temperature and day-length context Supports assessment of local adaptation and expected harvest timing.
- Pod phenotype
- Pod length in cm and seeds per pod, with maturity stage and sample size Helps characterise the material and distinguish vegetable-pod and grain harvest objectives.
- Seed phenotype
- Seed-coat colour, pattern, hilum marking, shape and surface texture Supports accession comparison and detection of mixed seed lots without making colour a species test.
- Root nodulation
- unexamined | absent in sample | present | effectiveness assessed separately Separates observed nodules from an unsupported claim about nitrogen fixation.
- Water and temperature exposure
- Temperature in °C; rainfall or irrigation in mm over a stated interval; soil-water measure with method Allows stress responses to be interpreted by developmental stage and genotype.
- Health burden
- Affected plants or organs in %, with symptoms, sampling basis and diagnostic confidence Supports proportionate responses to injury, pests or disease.
- Seed-lot germination
- % normal seedlings under a stated test method and date Determines whether stored material is suitable for propagation.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 26 questions.
Cowpea identity and diversity Establish what material belongs to Vigna unguiculata and which within-species distinctions affect its interpretation.
Common names and conspicuous pod or seed forms can obscure the boundary between species, cultivated groups and individual accessions.
Species diagnosis
Connect identification to observable botanical evidence.
Diagnostic character combination
Record the characters and reference used to identify the material, including evidence that excludes nearby alternatives.
- Which observed leaf, stipule, flower, pod and seed characters support identification as Vigna unguiculata under the chosen botanical key? definition
- Which locally plausible Vigna or Phaseolus alternatives remain unexcluded, and what additional material would distinguish them? boundary
Cultivated and wild identity
Represent diversity within the species without creating duplicate species models.
Accession and group attribution
Keep cultivar, cultivated-group and wild-population claims attached to their evidence and naming system.
- What cultivar, cultivated group or wild-population designation accompanies this material, and who supplied that identification? provenance
- Does a label such as black-eyed pea or yardlong bean identify a documented group, a seed appearance or only a market name here? boundary
Growth and reproductive development Describe the plant's architecture and progression toward the intended harvest or reproductive outcome.
Cowpea material differs in growth habit and reproductive timing, so species identity alone cannot determine support needs or harvest dates.
Architecture and vegetative growth
Relate plant form to management and observation.
Habit and canopy expression
Record expressed growth habit under known spacing, support and growing conditions.
- Is this material erect, spreading, trailing or climbing under the observed conditions, and how was that classification made? measurement
- What support or spacing adjustment is justified by its observed habit and intended pod, grain, leaf or forage use? action
Flowering and pod development
Track reproductive stages with environmental and cultivar context.
Reproductive timing and retention
Distinguish flowering onset, pod establishment and maturation rather than assigning one fixed species-wide crop duration.
- How many days elapsed to flowering and pod maturity under the recorded sowing date, temperature and day length? measurement
- What proportion of observed flowers developed retained pods, and what evidence could explain losses? measurement
Environment, nodulation and health Assess whether the growing environment and biological interactions support the observed cowpea material.
General claims about drought adaptation or legume nitrogen fixation cannot establish the condition of a particular plant or crop.
Abiotic exposure
Interpret environmental stress by genotype, timing and measured exposure.
Stage-specific stress assessment
Link signs of stress to water, temperature and soil observations without assuming a universal tolerance threshold.
- What water deficit, waterlogging or temperature exposure occurred during establishment, flowering or pod filling? measurement
- Which locally supported intervention fits the observed stress, developmental stage and available water or drainage conditions? action
Root symbiosis and biotic injury
Separate beneficial root associations from nutritional limitations and pest or disease damage.
Nodulation and nitrogen status
Record nodulation observations separately from evidence of effective nitrogen fixation or adequate plant nitrogen.
- What root sampling shows nodule presence and condition, and what additional evidence assesses fixation effectiveness? measurement
- What local evidence supports inoculation or nutrient intervention for this seed material, soil and cropping history? action
Biotic damage diagnosis
Document damage to cowpea leaves, flowers, pods or roots with an explicit distinction between symptoms and a confirmed cause.
- Which organs are affected, at what incidence and severity, and what organism or diagnostic evidence accompanies the symptoms? measurement
- What further diagnosis or locally applicable management guidance is needed before choosing a control action? action
Harvest and seed continuity Connect intended use to harvest stage and preserve the identity and reproductive quality of retained seed.
Tender-pod harvest, dry-grain harvest and seed conservation require different maturity criteria and handling decisions.
Organ-specific harvest
Assess readiness for the particular organ and purpose selected.
Harvest purpose and readiness
Specify whether the target is leaves, tender pods, grain, forage or propagating seed and assess the corresponding condition.
- Which organ and use are intended, and what cultivar-specific maturity or quality criteria define readiness? definition
- Should harvest proceed, be repeated selectively or be delayed given pod development, seed maturity and plant condition? action
Seed storage and regeneration
Maintain usable and traceable reproductive material across storage and planting cycles.
Seed-lot integrity and viability
Assess identity, mixing, moisture, insect damage and germination before retention or propagation.
- What are the lot's provenance, measured moisture, germination result and evidence of storage-insect damage? measurement
- What drying, storage or regeneration action is supported by the lot's intended use and measured condition? action
- How will regeneration retain accession identity and manage unintended mixing or crossing under local conditions? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The entry is interpreted at species level, including cultivated forms and wild relatives.
- Formal ranks and names used for cultivated groups, especially yardlong bean, should be checked against the chosen taxonomic authority.
- Growth habit, maturity, yield and seed composition vary substantially by cultivar and environment; no universal measurement ranges are asserted.
- Which of these check these first hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Black-eyed pea cultivars
- Crowder pea cultivars
- Cream pea cultivars
- Yardlong bean cultivars
- Fodder and dual-purpose cultivars
- Which of these kinds and varieties hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Botanical nomenclature - Vigna unguiculata (L.) Walp. - Scientific name with author citation; cowpea is the usual English common name.
- Which of these identifiers and schemes hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Dry seeds cooked as pulses or processed into flour and foods.
- Immature pods and young leaves eaten as vegetables.
- Foliage and crop residues used as livestock feed.
- Cover cropping and green manure.
- Intercropping and crop rotation, with biological nitrogen fixation through compatible root-nodule bacteria.
- Which of these real-world use hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Cowpea weevils and other bruchid beetles can severely damage stored seeds.
- Aphids, flower thrips, pod borers and pod-sucking bugs can reduce yield.
- Viral diseases, including cowpea aphid-borne mosaic, can impair growth and production.
- Parasitic weeds such as Striga gesnerioides can cause serious losses in susceptible cultivars.
- Waterlogging and poorly drained soil can impair roots and encourage disease.
- Which of these failure modes and hazards hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- In West Africa, cowpea is widely grown for dry grain and livestock fodder, often alongside cereals.
- In South and Southeast Asia, yardlong bean forms are commonly grown for immature pods.
- In the southern United States, cowpea is also called southern pea or field pea, with black-eyed, crowder and cream types distinguished.
- Which of these regional variation hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Black-eyed pea - A cultivated type within Vigna unguiculata, typically distinguished by a dark marking around the seed hilum; it is not a separate species.
- Yardlong bean - A cultivated group within Vigna unguiculata selected for very long pods eaten immature.
- Vigna radiata - Mung bean is a separate species in the same genus.
- Phaseolus vulgaris - Common bean belongs to a different genus, despite overlapping culinary uses.
- Pisum sativum - Garden pea belongs to a different genus and is generally a cool-season crop.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Vigna unguiculata this model covers, and on what evidence? provenance
What the second pass must settle
- Which taxonomic authority and infraspecific treatment should govern wild forms, cultivated groups and synonyms within this registry entry?
- Which regional botanical keys provide reliable diagnostic combinations for separating this species from the Vigna and Phaseolus taxa likely to be encountered?
- What cultivar-specific evidence establishes photoperiod response, crop duration and stress sensitivity in the intended growing region?
- Which local evidence supports rhizobial compatibility, inoculation decisions and diagnosis of the principal cowpea pests and diseases?
- Which validated harvest, seed-moisture, storage and regeneration criteria apply to each intended use and accession?