HOP INSECTS III 



Hop merchants * (Polygonia intcrrogationis) 

 (Polygoma comma) 

 Order — Lepidoptera 



The so-called hop merchants are simply the shin- 

 ing chrysalids of these two butterflies. The cater- 

 pillars of each are covered with branching spines 

 and live upon the foliage of the plants. Both but- 

 terflies have two generations but the first genera- 

 tion of each is spent upon food plants other than 

 the hop. The second generation of each is spent 

 on the hop, the butterflies hibernating through the 

 winter. Both butterflies show a dimorphism, the 

 fall or winter forms differing from the summer 

 forms. 



Control — Use the powdered arsenate of lead, as 

 for the snout-moth. 



The hop redbug ^ (Paracalocon's hazvleyi) 

 Order — Hemiptera 



The insect winters as eggs in the bark or attached 

 to the wood of hop poles ; the eggs hatch through- 

 out most of June and the red nymphs deform and 

 stunt the vines and produce holes in the leaves : the 

 nymphs attain their growth in about thirty days 

 the adults appearing in August; there is one gen- 

 eration a year. 



Control — Spray with nicotine sulphate, ^ pint 

 to loo gallons of water with 4 pounds of soap 

 added. 



OTHER INSECTS INJURIOUS TO HOPS 



Red Spider (Tefranyclius fclarius). 

 Hop flea-beetle (Psylliodes punctnJata). 



4 Howard— U. S. Bu. Ent, Bull. 7. 



= Hawley— Cornell Univ. Expt. Stat., INIemoir 15, p. 182. 



