ENVS 1126 Chapter : Chapter 13 Notes
Document Summary
The need for pest control: pest: any organism that is noxious, destructive or troublesome. Pathogens, wild animals, insects, mold, etc: agricultural pests: feed on crops or animals. Insects, fungi, viruses, worms, rats, mice, birds. Weeds compete with crops, forests: disease vector: an agent that carries a parasite from one host to another, ex. mosquitoes/malaria, forest pests kill trees and wood products, biofouling organisms settle in aquatic environments. Interfere with shipping, clog pipes, ex: barnacles: stored product, fabric and paper pests, ex: weevils. The pesticide expense: pests cause billion/yr in lost u. s. agriculture, in 2007, the u. s. paid . 5 billion for: 1. 1 billion pounds of herbicides and pesticides: in 2007, billion was spent on 5. 21 billion pounds of pesticides worldwide, pesticide use has increased worldwide, chemical treatment of pests: eradicates or decreases pest numbers. Chemical pesticides: pesticides are categorized by the organisms they kill. Insecticides (insects), rodenticides (rats, mice), fungicides (fungi), herbicides (plants)
