Chapter 6 Self-test questions

. The International Plant Protection Convention (IPPC) states that surveillance is:

An official procedure conducted over a defined period of time to determine the characteristics of a pest population.

An official procedure conducted over a defined period of time to determine which pest species are present in an area.

An official process which collects and records data on pest presence or absence by survey, monitoring or other procedures.

An official ongoing process to verify phytosanitary situations.

. How many member countries belong to the European and Mediterranean Plant Protection Organisation (EPPO)?

27

31

45

51

. A delimiting survey is designed to do what?

Establish the boundaries of an outbreak area.

Detect the presence or absence of a regulated disease.

Detect changes in a known outbreak.

Confirm the effectiveness of a treatment.

. What is the most common confidence level worked to in NPPO surveys?

90%

95%

99%

100%

. Systematic sampling requires that:

Each unit has an equal probability of being selected for sampling.

Each unit sampled is taken from a separate subdivision.

Each unit is selected at fixed intervals for sampling.

Each unit sampled is only selected at set times of the year.

. Approximately how many hectares of potatoes are grown in the UK?

540,000

80,000

260,000

120,000

. In the UK, what are the three categories of healthy, high quality seed potatoes?

Super Elite, Elite, and Certified.

Tissue culture, Field grown, and Approved.

Pre-basic, Basic, and Certified.

Pre-approved, Approved, and Certified.

. What percentage of the yield of a potato crop can be lost if it is infected by Potato Ring Rot?

10%

25%

33%

50%

. How many tubers must be tested to detect a 0.3% level of Ring Rot infection?

6000

4000

2000

1000

. At what temperature does the number of Brown Rot bacteria cells fall below detectable levels?

3°C

7°C

14°C

16°C

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