Silent Spring

acres agents Agriculture aldrin animals applied areas arsenic become biological control birds body cancer carcinogens cause cells cent Chem chemicals chlordane chlorinated hydrocarbons chromosome cides contained crops damage dead death destruction developed dieldrin Drug Administration Dutch elm disease effect eggs endrin Entomol entomologists environment enzyme experiments exposure fact farmers feeding field fire fire ant fish Florida Food and Drug forests gypsy moth hazard heptachlor herbicides Hueper human important insect control insecticides Japanese beetle Jour killed laboratory lake land large numbers larvae lethal lindane liver living malathion malignant million Miramichi mosquitoes nature nests normal organic phosphates oxidation parasites parathion pest pesticides plants poison pollution population pounds predators problem Proc produce Public Health radiation reported residues resistance river roadsides robins salmon screw-worm secticides soil species spraying sterile streams tests tion tissues toxaphene toxic treated trees U.S. Dept United vegetation Wildlife young