Controlling Pests

Dr. Forrester introduces the fascinating world of insects, highlighting their unique features like exoskeletons and survival skills. Cockroaches, for instance, can live without a head for weeks. While some insects like bees and dung beetles are beneficial, others like locusts and grubs can devastate crops. Farmers use pesticides and alternative methods to manage these pests, but must be cautious of side effects like those from DDT. Effective crop management strategies include using resistant crops and natural predators. Despite their challenges, insects play a crucial role in agriculture.

What is a unique feature of insects that differentiates them from humans?

• They have no eyes.

• They have an endoskeleton.

• They have two legs.

• They have an exoskeleton.

Which insect is known for its ability to survive without its head for a week?

• Grasshopper

• Cockroach

• Bee

• Butterfly

How do dung beetles contribute to the environment?

• They decompose dead animals.

• They produce honey.

• They pollinate flowers.

• They feed on feces.

What is a potential negative effect of using pesticides like DDT?

• They cause bird eggs to become fragile.

• They make insects grow larger.

• They improve soil quality.

• They increase crop yield.

Which method can farmers use to naturally control harmful insects?

• Planting more trees

• Increasing water supply

• Introducing beneficial insects

• Using chemical fertilizers