PESTS OF THE HOP CROP. 



143 



"Spraying should be commenced as soon as the lice make 

 their appearance and should be continued as often as neces- 

 sary, until the hops begin to burr, after which the spraying 

 will do but little good, as the lice get inside the hop, where 

 the spray cannot touch them. The number of times it is 



FIG. 73. NEEDLE-NOSED HOP BUG (Colocoris fulvomaculatus). 



b, Proboscis, greatly enlarged. 



necessary to spray a hop yard depends upon the location, 

 the density of the foliage of the vines and the weather dur- 

 ing the months of June and July, as hop lice breed and in- 

 crease very rapidly in damp, rainy weather and very slowly 

 in hot, dry weather." 



