114 



INSECTS AFFECTING THE GFvAPE. 



the use of American stocks and planting in sandy 

 soils ; (2) the employment of insecticides (bisulphide 

 of carbon, sulphocarbonate of potassium, and the 

 kerosene emulsion) ; and (3) submersion." 



INJURING THE LEAVES. 



The Grape-vine Flea-beetle. 



Grt iptodera ch alybea. 

 This is a small, steel-blue beetle (Fig. 52, d) that 

 is often very destructive to grape-vines. It hiber- 

 nates as an adult. As soon in spring as the buds 

 begin to swell the beetles come forth and attack them. 



The injury at 

 this time is 

 often great, 

 because the 

 immature leaf 

 and fl o w e r 

 buds are so 

 easily destroy- 

 ed. The bee- 

 tles continue 

 feeding for 

 three or four 

 weeks, during 

 the latter part 

 ofthe time de- 

 Fig. 52. Grape-vine Flea-beetle : a, leaf infested by posi ting Small 

 larvae; b, larva, magnified ; c, cocoon; d, beetle, .. 



magnified. orange-yellow 



eargs iii clusters on the under sides of the leaves. 



