Smithsonian Report. 1937. — Stront; 



Plate 12 



Corn Leaf Aphid 



carrier of 

 Sugarcane Mosaic. 



European Bark Beetle 



carrier of 



Dutch Elm Disease. 



Three Spotted Leafhopper 



carrier of 



Peach Yellows. 



Beet Leafhopper 



carrier of 



Sugarbeet Curly Top. 



Insect carriers of Plant Diseases. 



