Homework Help Forum: 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.

  
  

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