1. PESTICIDES
CHAPTER 2.2 ( Case Study )

2. THINGS TO DO:
Read Chapter 2.2
Page 52-57
Fill in the worksheet

3. ANSWERS TO WORKSHEET QUESTION 1 – Define the following:
A) Pest – is an organism that people consider harmful or inconvenient
Examples:
Weeds, insects, fungi, and rodents
B) Pesticide – chemicals designed to kill pests
Examples: Raid , DDT

4. Controls unwanted populations Pollution
QUESTION 2 – Complete the table on the advantages and disadvantages of pesticide use:
Advantages
Disadvantages
Controls unwanted populations
Pollution
Increases Food Yields
Bioamplification
Prevent diseases
Ecosystem Decline (alternates)

5. QUESTION 3 – What is the main difference between first generation and second generation pesticides?
1st Generation – natural chemicals
2nd Generation – made in Laboratory

6. QUESTION 4 – Complete the table on the types of pesticides:
Type of Pesticide
Target
Persistence
Insecticide
Insects
2-15 years
Herbicide
Weeds
Days to Weeks
Fungicide
Fungi/Moulds
Few Days
Bactericide
Bacteria

7. QUESTION 5 – Clearly explain BIOAMPLIFICATION
Is the increasing concentration of a toxin, in the fatty tissue, as organisms consume each other.

8. QUESTION 5 B) – Provide an example of how Bioamplification occurs
Page 54, Figure 4 provides a good example
1 part per Grasshopper part per Shrew parts per Owl

9. QUESTION 5 C) – What can be done to prevent Bioamplification?
Make pesticides that do not stay in the fat tissue
Make pesticides that can be extracted from your body thru urination.

10. QUESTION 6 – Reflect and Answer Parts L-P on pages 56-57
L) Spruce budworms have become resistant to the pesticides available. If all of the pests are not wiped out in the first wave, the survivors can multiply in number.
M) Concentrations of pesticide sufficiently high to kill all the spruce budworms would also kill many other species, beneficial as well as harmful, insects as well as other organisms.

11. N) The loggers and lumber and paper-mill workers have benefited from the New Brunswick spraying program.
O) The loggers, lumber and paper-mill workers, and First Nations peoples depending on the forests for a livelihood, might have lost out as a result of the decision not to spray on Cape Breton Island.

12. P) Not spraying on Cape breton Island has allowed the ecosystem to adjust and naturally recover from the spruce budworm infestation.