no INSECTS OF FXONOMIC IMPORTANCE 



rope wherever the hop grows. It is often exceed- 

 ing-ly destructive. 



The eggs are laid in the East in the fall on dif- 

 ferent varieties of plums; in the West the aphids 

 are said to pass the winter on hop roots; the eggs 

 hatch in the spring, and the winged forms of the 

 third generation go from the plums to the hops, 

 where they live until fall. They multiply rapidly 

 and sometimes cover the leaves and stunt the vines. 

 At picking time a winged generation flies back to 

 the plums and gives birth to the true females which 

 lay the eggs. 



Control — Spray with nicotine sulphate, J4 pii^^t 

 to lOO gallons of water, with 8 pounds of whale- 

 oil soap. 



Hop-vine snout-moth ^ {Hypcna humiili) 

 Order — Lepidoptera 



The larv?e of this moth are sometimes exceed- 

 ingly destructive to the vines which they soon de- 

 foliate when abundant. It seems to have no other 

 food plant than the hop and follows this plant in its 

 distribution. 



The larv?e are semi-loopers for they lack some of 

 the prolegs; the pale green eggs are laid on the 

 undersides of the leaves ; the larvae eat the leaves 

 voraciously; the larvcC pupate in the ground, in 

 crevices in the poles and in leaves; there are two 

 generations a year, the last brood of moths hiber- 

 nating in protected places. 



Control — Spray vines with arsenate of lead, 5 

 pounds to 100 gallons, or dust vines with powdered 

 arsenate of lead, 4 pounds to the acre. It can be 

 mixed with sulphur which is used for the mildew. 



2 Hawley — Cornell Univ. Expt. Stat., Memoir 15, p. 190. 



