SAMPLE QUESTION

TASKTASK

Write a report

Make a choice

Compare the 2 methods

Give reasons for choice of one over the other

Add any relevant information

Methods Advantages Disadvantages

Insecticides Save great quantities of food from pests and diseases before harvest or during storage.

Increase crop yield.

Kills useful insects.

Adverse effects on wildlife for many years to come.

Biological control

Using natural predators to control pests.

Host resistance is not a problem.

Expensive to find biological control agents.

Can never eradicate a pest completely.

Choice Made :

INSECTICIDES

Advantage :Save great quantities of food from pests and diseases before harvest or during storage.

Advantage :Increase crop yield.

• harvest and storage - the critical period that determines a farmer’s income

• reliability of insecticides ensures that the quantities of food that is harvested and stored is maintained at the most maximum.

• a variety of insecticides to choose from on the market, such as DDT, malation and furadan able to make a choice as to the most effective at the most affordable

• also increase their profit margin.

Choice Made :

INSECTICIDES

Disadvantage :Kills useful insects.

Disadvantage :Adverse effects on wildlife for many years to come.

• useful insects that help pollination and pest control, such as butterflies, bees and ladybugs.

• can be resolved by spraying the insecticides after pollination has occurred and when plants are in bud.

• can easily be reduced by using the insecticides which are lowest in the toxicity range

Choice Made :

INSECTICIDES

Advantage :Save great quantities of food from pests and diseases before harvest or during storage.

Advantage :Increase crop yield.

Disadvantage :Kills useful insects.

Disadvantage :Adverse effects on wildlife for many years to come.

Methods Advantages Disadvantages

Insecticides Save great quantities of food from pests and diseases before harvest or during storage.

Increase crop yield.

Kills useful insects.

Adverse effects on wildlife for many years to come.

Biological control

Using natural predators to control pests.

Host resistance is not a problem.

Expensive to find biological control agents.

Can never eradicate a pest completely.

Compare & give reasons over other:

Biological Control

Advantage :Using natural predators to control pests.

Advantage :Host resistance is not a problem.

• ladybugs will be used to control aphids

• short-term resolve to the problem because artificial introduction of natural predators to an area will cause an imbalance in the food chain

• in the end the predators themselves will end up being the pests, due to the lack of food.

• pests will never become resistant to their predator

• pests become resistant to insecticide after a period of time.

• easily resolved if the insecticides used are changed before pests become resistant to them.

Compare & give reasons over other:

Biological Control

Disadvantage :Expensive to find control agents

Disadvantage :Can never eradicate a pest completely

• Research needs to be done on whether the weather conditions and surrounding environment are suitable for the control agents to thrive

• Research costs money

• in the long run, the pests and predators will achieve a balance in numbers

• the cycle of destruction begins

A

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of an excellent answer

A

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of an almost excellent answer

A

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of a poor answer

Another

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of a poor answer