Evidence: well sourced. Imported from the supplied 65-Case Master Edition, dated September 19, 2026. Source links and classifications are retained as an attributed case account; import is not an independent source review.
Case at a glance
- Case number
- 062
- Date / range
- Ongoing crop-disease threat
- Sector
- Genetic resources, agriculture, and biodiversity
- Genetic asset
- Cavendish cultivars and planting material
- Security principle
- Genetic Monoculture Risk
Event summary
The globally important Cavendish banana trade depends heavily on clonally propagated, genetically similar plants, allowing Fusarium wilt Tropical Race 4 to exploit a broadly shared susceptibility.
Source: fao.org — Cavendish Bananas And Tropical Race 4 source 1.
Source: fao.org — Cavendish Bananas And Tropical Race 4 source 2.
The case in context
Cavendish production illustrates the tradeoff between a standardized crop and shared susceptibility. Clonal similarity can support consistent production while making a disease threat relevant across a broad network of growers.
The case does not predict the disappearance of every banana. Other varieties, locations, and production systems need separate consideration. The resilience question is how breeding, conservation, clean material, and surveillance can reduce dependence on a narrow set of options when biological change cannot be handled through a quick operational patch.
Acquisition and processing
commercial preference → clonal uniformity → shared susceptibility → soil-borne pathogen spread → regional quarantine/loss → breeding and diversification response
The sequence of events
- commercial preference
- clonal uniformity
- shared susceptibility
- soil-borne pathogen spread
- regional quarantine/loss
- breeding and diversification response
What became inferable or exposed
Cavendish cultivars and planting material
The globally important Cavendish banana trade depends heavily on clonally propagated, genetically similar plants, allowing Fusarium wilt Tropical Race 4 to exploit a broadly shared susceptibility.
Affected parties and consent
- Direct parties
- Growers and food-system participants affected by disease risk
- Indirect parties
- Connected institutions, communities, or resource users; no affected-person total is assigned.
- Direct count
- Unknown / not assigned
- Indirect count
- Unknown / not assigned
- Consent status
- Access, stewardship, breeding, and benefit-sharing arrangements depend on the collection and setting. These are not necessarily individual privacy questions.
Security dimensions
Confidentiality
The confidentiality question concerns cavendish cultivars and planting material. Exposure and further inference must be distinguished from the fact of collection or availability.
Integrity
The integrity question is whether the described material, permissions, processing, or interpretation can be relied upon. Genetic Monoculture Risk identifies the particular boundary examined here.
Availability
Access and continuity are assessed for the described event; potential effects are not presented as confirmed outages or losses.
Provenance
The relevant chain follows cavendish cultivars and planting material through the stages shown below. Missing public detail is not proof that internal records did not exist.
Consent, persistence, and relational exposure
Consent
Access, stewardship, breeding, and benefit-sharing arrangements depend on the collection and setting. These are not necessarily individual privacy questions.
Persistence
Later reuse depends on the actual asset and links to other records; no future misuse is asserted.
Relational exposure
Connected institutions, communities, or resource users; no affected-person total is assigned.
Case-specific assessment
availability critical; genetic-resource diversity and resilience critical; provenance high; confidentiality low.
GeneticSecurity.org analysis
Genetic Exposure Radius
No single level is assigned where the supplied dossier gives a range, conditional outcome, or broad institutional consequence. The affected parties and proposed assessment are shown separately.
Confidence: not assigned. Classification: GeneticSecurity.org analysis.
Genetic Persistence Risk
Persistence depends on the specific biological material or information retained. A potential effect is not treated as an observed genomic disclosure.
Confidence: not assigned. Classification: GeneticSecurity.org analysis.
Genetic Provenance Integrity
A numeric provenance level is not inferred from the existence of a source or court record. It requires evidence of the relevant custody and processing controls.
Confidence: not assigned. Classification: GeneticSecurity.org analysis.
Proposed classification and its limits
Suggested GER: GER-5. Genetic-resource persistence: high because susceptible production systems cannot be “patched” quickly. Suggested GPI: GPI-4 for breeding materials.
These are proposed classifications from the supplied case dossier. Conditional scores describe an assumed exposure; they are not evidence that it occurred. A single numeric value is left unassigned when the asset or outcome is not sufficiently bounded.
What this case does not prove
Cavendish bananas are not the only bananas, and TR4 does not imply immediate global disappearance.
Mitigations and lessons
- Portfolio diversity
- Resistant cultivars
- Wild-relative conservation
- Clean planting material
- Surveillance
- Quarantine
- Soil hygiene
- Distributed breeding programs
Primary sources
- PRIMARY SOURCE fao.org — Cavendish Bananas And Tropical Race 4 source 1
- PRIMARY SOURCE fao.org — Cavendish Bananas And Tropical Race 4 source 2
Secondary sources
No additional source listed. See the evidence notes for limitations.
Policy and standards
Genetic Security Policy and StandardsReview and correction history
Source edition: September 19, 2026. Imported case account; no substantive corrections recorded.
Correction policy and logCite this case
GS-CASE-062. Cavendish vs. TR4: The Security Cost of a Clone Army. GeneticSecurity.org. https://geneticsecurity.org/cases/062-cavendish-banana-tr4-genetic-uniformity/