23 



Table 5. TREND TO NEWER AGRICULTURAL PESTICIDES! COMPARISON OF SOME CANADIAN 

 SALES VALUES FOR 1947 and 1957-58 [57] 



Pesticide 



Calendar Year 

 1947 



Crop Year 

 1957-58 



Older materials! 



Lead arsenate 

 Calcium arsenate 

 Paris green 

 Liquid lime sulfur 

 Nicotine 



Newer pesticidesi 



DDT 



Benzene hexachloride 



Other chlorinated hydrocarbon insecticides 



Organic phosphorus insecticides 



Dithiocarbamate fungicides 



2,4-D derivatives 



Table 6. EFFECTS OF SINGLE APPLICATIONS OF DDT IN OIL SOLUTION ON VERTEBRATES 

 AND CRUSTACEANS 



Pounds DDT 

 Per Acre Crustaceans Fish Amphibians Reptiles Birds Mammals 



0.1 



0.25 



1.0 



2.0 



5.0 



+(+)? 



- No immediate apparent effect. 

 + Some kill. 

 ++ Moderate kill. 

 +-H- Heavy kill. 



