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6 marksSustainable Agricultural Practices

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

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.

Suggest THREE reasons why this method of pest control was recommended.

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)(iv)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?[3 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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