Surveillance systems

There are two types of surveillance systems General surveillance and Specific survey.

A.     General surveillance:

It is a process whereby information on particular pests that are of concern for an area is gathered from many sources, wherever it is available, and provided for use by the national plant protection organization (NPPO).

B.     Specific surveillance

These are official surveys and should follow a plan that is approved by the National Plant Protection Organisation(NPPO).

1. Detection surveillance: surveillance conducted in an area to determine if pests are
2. Delimiting surveillance: surveillance conducted to establish the boundaries of an area considered to be infested by or free from a pest.

3. Monitoring surveillance: Ongoing surveillance to verify the characteristics of a pest

Specific surveys should follow a specific plan

• Identification of the target pests
• Identification of scope ( geographical area, production system, season)
• Identification of timing (dates, frequency, duration), In the case of commodity pests lists, the target commodity
• Indication of the statistical basis (level of confidence, no. of samples, selection and number of sites, frequency of sampling, assumptions)
• Description of survey methodology and quality management including an explanation of: