138 THE HOP. 



conflucnta. Say, were received from Puyallup, Wash., 

 in August, with the statement that they were very 

 numerous upon the blossoms or cones, and were injur- 

 ing their quahty to some extent. Further reports of 

 damage of the same nature have not since been 

 received, but it is an insect which hop growers of the 

 northwest should know and should guard against. In 

 the east, the most abundant of the leaf hoppers found 

 in the hop yards is TypJdocyba rosac, numbers of which 

 were found in the yards at Richfield Springs, N. Y., in 

 June, 1887, causing more or less damage to the foliage. 

 Another species, more closely related to the one found 

 in the state of Washington, was collected in numbers 

 on the hop vines at Waterville, N. Y., in July, 1883, by 

 Dr. Smith. It is a handsome species of the genus Typh- 

 locyba, and is of a yellowish-green color. Dr. Smith 

 found that yards badly affected with lice had none of 

 these hoppers, while in yards in which the lice were 

 absent, the hoppers were more numerous. 



Nearly all of these leaf hoppers over-winter in the 

 adult condition, under leaves and rubbish at the surface 

 of the ground. A hop yard, therefore, wdiich is thor- 

 oughly cleaned up in the autumn, and all leaves and 

 rubbish burned, will generally be free from this insect. 

 Where they are very abundant in the summer time, 

 there are two remedies which may be adopted. The 

 great activity of these insects under ordinary circum- 

 stances makes spraying ineffective, but during the early 

 morning or late in the evening — especially on a cool, 

 moist day — they are more torpid and can then be struck 

 by a spray of kerosene emulsion. A method which has 

 been adopted in New York vineyards and also to some 

 extent in California vineyards, is to make a light shield 

 of a lath frame, with cloth stretched over it, and this, 

 when saturated with kerosene or painted with tar, is 

 carried through the field to the leeward of the vines, 

 the vines being stirred on the other side. The hoppers 



