Homework Help: Ecology

Posted by mary22 on Wednesday, September 17, 2008 at 5:21pm.

After spraying crops with DDT for several years, farmers found that populations of insect pests reboundED. One reason was that insects had developed resistance to the insecticide. Suggest another reason, based on what you know about populations, pyramids, predators, and competitors.

HELP!

DDT= pesticide.

I'm extremely confused.

Ecology - Ms. Sue, Wednesday, September 17, 2008 at 5:32pm
Did DDT also kill off some of the insects' predators?
Ecology - mary22, Wednesday, September 17, 2008 at 5:34pm
My book doesn't specify.
But I would say yes...
- Ecology - Ms. Sue, Wednesday, September 17, 2008 at 5:38pm
  Right!
Ecology - mary22, Wednesday, September 17, 2008 at 6:21pm
Thank You.
Ecology - harrib, Tuesday, October 25, 2011 at 6:43pm
no it didnt

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