In spite of hundreds of millions of dollars spent on insecticides targeted at pest species such as mosquitoes and crop pests,we have been unable to drive any to extinction.On the other hand,bird,fish,plant,and insect species that we barely recognize have gone extinct.This has mainly been due to

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While hunting,fishing and insecticide used do play role in the extinction of species,by far the most serious threat to the loss of biodiversity is habitat loss.In areas such as a tropical rainforest the species can be lost when farmers use slash-and-burn method of agriculture and their existence is never known before they are lost.

In Spite of Hundreds of Millions of Dollars Spent on Insecticides