B.11 Controlling Weeds and Pests

Question 1

What are herbicides?

Answer 1

Chemicals that kill plants (ex. weed killer)

Question 2

What are pesticides?

Answer 2

Substances that kill or repel insects.

Question 3

What is biological control?

Answer 3

A natural predator is used to control a pest.

Question 4

What are some examples of biological conrtol?

Answer 4

Killing mostquitoes with bats.

Question 5

What are some drawbacks of herbicides?

Answer 5

-Kills off a consumers food or disrupts the balance of the food web.
-Can reduce soil quality
-Can pollute rivers, streams, and lakes
-Weeds may become resistant to it

Question 6

What are some drawbacks of pesticides?

Answer 6

-Can kill pollinators
-Insects may become resistant to it
-Small amounts are on our food when we buy it

Question 7

What are some drawbacks of biological control?

Answer 7

-Doesn’t get rid of all pests
-Changes the balance of the ecosystem
-Takes a while to work