Silent Spring

Chapter 15

1. Summary-basis of Chapter 15:

The balance of nature was threatened by the pesticides, and only natural predators and prey in the environment can fight infestation. Arial spraying had just made populations increase for the certain regions sprayed with DDT. DDT not only reduced pests, it reduced predators that fed on these pests so multiple problems had risen. Bugs that had carried diseases flourished from the pesticides, causing yet another problem. These disease carrying bugs flourished because the pesticides had targeted agricultural bugs, causing the predators of those bugs to then decrease in population as well; the bugs carrying diseases then had no predators to reduce the number of them.


- "The insect world is nature’s most astonishing phenomenon."

-"But the broader problem, which we shall look at now, is the fact that our chemical attack is weakening the defenses."

-"Upsets in the balance of insect populations caused by pesticides."

In the chapter, Carson gave many examples of what occured in the environment, or what had occured before DDT had disrupted everything.


3. What we found Suprising:

-Even though many had said the pesticides would help all situations, they had just made matters worse; when people would spray the pesticides, the bugs would know and try to relocate, avoiding the harmful chemicals.

-Why did the pesticides increase the bugs that had carried diseases? If the pesticides where meant to stop the viral illnesses caused by bugs, why did she conclude by saying DDT had only influenced the number of bugs with diseases.