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Group Exercise No. 3.5 – Pest Risk Assessment, Peer Review

Peer review is a valuable process for ensuring scientific validity, consistency and transparency in the PRA process. This process is often first done internally in order to ensure that all parties within the NPPO are in agreement with the PRA before it is released to external groups.

In this exercise, each group will present its Pest Risk Assessment to the other group for peer review. Participants will assume the role of experts within the same NPPO. Each group will be called upon to present its pest risk assessment for review and, in turn, to review the pest risk assessment presented by the alternate group.
Take 10 minutes to organize your presentation; be prepared to explain and justify the conclusions you have reached so far in your assessment and present your findings to the other group. Be prepared to listen to their comments, incorporate new information and make changes based on new information they present.
Be prepared, also, to listen to the presentation of the other group’s pest risk assessment and provide constructive suggestions for its improvement.

Group Exercise No. 3.6 – Pest Risk Management

For those pests presenting unacceptable risks, the conclusions of the pest risk assessment are used to support decisions on the strength and nature of measures to be used to reduce those risks to an acceptable level. Pest risk management, therefore, is the process of evaluating and selecting risk management options to reduce the risk of the pest(s) identified in the pest risk assessment.

Mitigation measures may be applied at different stages between origin of the pathway and its final destination. A scenario diagram detailing the sequence of events between the pest’s first association with the pathway and its establishment in the PRA area helps to identify key areas where mitigation measures may be applied effectively.
Outline the sequence of events that must take place for Scirtothrips aurantii to be introduced to India following importation of cut flowers from Africa. Identify points along this timeline at which mitigation measures could be applied. More boxes can be added to the diagram below if required.

ISPM No. 11 and the Participant Manual provide suggestions for the types of management options that may be available at different points in the continuum between a pest’s origin and its destination in the PRA Area. In the table below, list the types of measures that would be available under the categories listed in ISPM No. 11 and for each example note potential costs, benefits or limitations there may be in their applicability, feasibility or efficacy in the case in question. More rows may be added if required.

For each option, consider the following questions:

  • What are the possible responses to this pest?

  • Are measures available?

  • What impacts, positive and negative, might be expected if these measures are applied?

  • What are the costs of each option?

  • Is the option operationally feasible?

  • Will it work?

  • Is feasibility dependant on outside influences?

Point of Intervention

Management Options

Costs, Benefits or Limitations to Consider

The conclusion of the pest risk management stage will be either that no measures are identified which are appropriate to address the identified pest risk, or that one or more management options (or series of options) is appropriate to lower the pest risk to an acceptable level.

Based on your information from the table above, identify two equivalent measures (or series of measures) which are appropriate to mitigate the pest risk identified in this scenario. These measures will form the basis of future phytosanitary regulations or requirements.

Option A

Option B

Option C





Points for Discussion:

  • What criteria did you consider in evaluating each option or in selecting preferred options?

  • What principles of the IPPC should be remembered during the pest risk management stage?

  • What are the most challenging aspects of the pest risk management stage?

  • What are some things that an NPPO could do to make this stage of the PRA easier?

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