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Introduction to Pest Risk Assessment
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Presentation Overview Purpose of Pest Risk Analysis (PRA) Principles of Pest Risk Analysis Components of Pest Risk Analysis
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Purpose of Pest Risk Analysis To estimate the likelihood of successful invasion by plant pests -Entry -Establishment -Spread -Consequences / Impact To justify phytosanitary measures on traded plant products
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Principles of Risk Analysis Sound science Structured and transparent Consistent and repeatable Guidelines: Guidelines for Pest Risk Analysis (ISPM 2) Pest Risk Analysis for Quarantine Pests (ISPM 11) Draft Guidelines for Pest Risk Analysis (Biosecurity Australia website)
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Components of Risk Analysis
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1. Initiation of a PRA A PRA may be initiated as a result of: - Identification of a pathway that presents a pest hazard - Identification of a pest that may require phytosanitary measures - Review or revision of existing phytosanitary policies or priorities PRA’s are most often initiated following a request for market access
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2. Risk Assessment Pest Risk Assessment can be divided into 3 steps: Step 1 – Pest categorisation Step 2 – Probability of entry, establishment and spread of the pest Step 3 – Assessment of potential economic consequences
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2. Risk Assessment Step 1 – Pest categorisation Identify quarantine pests Categorise pests (do they occur on the pathway?) Prepare data sheets
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Pest Categorisation Quarantine pests are retained for further assessment
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Prepare Data Sheets {Quarantine Pest Name} Species: Synonyms: Common name(s): Hosts: Plant part(s) affected: Distribution: Biology (life cycle): Epidemiology: Control: References:
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2. Risk Assessment Step 2 –Probability of entry, establishment and spread of the pest Assess the likelihood of entry of a pest Assess likelihood of establishment of a pest after entry Assess spread potential of the pest
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2. Risk Assessment (Cont’d) Assess entry potential –Likelihood that a quarantine pest will arrive in an importing country through the various pathways –Be distributed in a viable state to the endangered area –Dependant on production methods in the exporting country and importing country quarantine procedures –- orchard –- packing house –- transport –- on-arrival inspection
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Pathway for the Importation of Fresh Fruit
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2. Risk Assessment (Cont’d) Assess establishment potential - Host availability, abundance, distribution - Climatic suitability - Potential for pest to adapt - Reproductive strategy of the pest - Method of pest survival - Previous history of establishment - Abundance & range in country of origin - Cultural practices & control measures
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2. Risk Assessment (Cont’d) Assess spread potential –Suitability of the environment for natural spread –Presence of natural barriers –The potential for movement with commodities or conveyances –Intended use of the commodity –Potential pest vectors & natural enemies in the PRA area
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2. Risk Assessment (Cont’d) Step 3 – Assessment of Economic Consequences Impacts on productivity: – Yield losses – Increased control costs – Post-harvest disinfestation Impacts on trade / market access: – Domestic – International Impacts on the environment Impacts on human health
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Estimating the Overall Risk Posed by a Quarantine Pest For each pest, combine the likelihood of: - entry/establishment/ spread, and - consequence of entry/establishment/ spread: “Extreme” “High” “Moderate” “Extreme” “High” “Moderate” “Low” “Very low” “Low” “Very low”
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Estimating the Overall Risk Posed by a Quarantine Pest
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What if a pest poses an unacceptable risk? Risk Management measures may be required to reduce the risk to an acceptable level
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Exercise 2 – Compiling a Bid for Market Access Groups to compile a list of information required to conduct a PRA 40 minutes for group exercise 20 minutes for reporting and workshop discussion
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