US Dpt of Agri. ento. (Ref 4.1)

For nearly 90 years, efforts have been made to combat insect pests and diseases affecting plants and animals. If left unchecked, these pests could destroy American plant life and livestock.

For how many years has the war on insect pests been waged?

What has been waging an intensive war on insect pests?

What could happen if insect pests are unchecked?

What could be devoured by unchecked insect pests?

What could be wiped out by unchecked insect pests?