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3 marksSustainable Agricultural Practices

CAPE Environmental Science Unit 2 · 2010 · Paper 2 · Question 1(a)(iv)

A farmer in Trinidad consulted an agricultural extension officer about pest problems and was advised to use biological pest control. Figure 1 shows the changes in pest population and biological control agent over 12 months.

Why would the agriculture officer advise the farmer to try always to maintain the biological control agent at the level C shown in Figure 1?

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 1(a)(i)Describe the trend shown in Figure 1.[4 marks]
  2. 1(a)(ii)State THREE pieces of information that are vital when employing this method of pest control.[3 marks]
  3. 1(a)(iii)Suggest THREE reasons why this method of pest control was recommended.[6 marks]
  4. 1(b)The farmer on a nearby farm decided to continue to employ chemical control methods. Why do you think that the farmer made this decision in spite of his…[4 marks]

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