pennsylvanica : All three species of Blister beetles are injurious in the 

 adult stage. They are about half an inch long, with long- legs, and soft, 

 flexible wing covers. The Old-Fashioned form is striped yellow and black. 

 The Black and Gray forms look much alike, except for color. 



In the larval stage these insects are beneficial, living upon the eggs 

 of locusts. 



/ 



Blistering Beetles. 



Remedies : Spray with arsenical poisons. On account of their bene- 

 ficial nature, it is not advisable to spray unless they are very abundant. 



Beet-Leaf Miner (Pegomya vicina) : The larvae mine inside the leaf. 

 At first the mines are small, but later, large blotches appear on the upper 

 side of the leaf. The green tissue of the leaf is devoured, and the function 

 of the leaf is destroyed. 



Remedies : Gathering and destroying infected leaves ; crushing the 

 maggot inside the leaf. 



Woolly-Bear (Spilosoma virginica) : Large caterpillars, about one 

 and one-fourth inches in length. The color varies from pale yellow to 



mmm^^>^&^^^ 



cc 



Common Yellow Beak. — (SpUosoma virginica) Fab. :~a, caterpillar; h, pupa; c, adult. 



After Riley. 



straw color. The adult is a snowy white moth, marked with a few black 

 dots. The larvae feeds on the leaves of the beet. 



Remedies : Hand picking ; Paris green in Bordeaux. 



