20 



THE APPLE LEAF IKiPI'l'.K 



represented, however, and from this time on nntil the end of the 

 season no definite observations were obtained in regard to the number 

 of broods. 



On July 16th young Eiiipoasca were found feeding on quack grass, 

 Agropyron rcpcns at Albert Lea, and also on the same grass at Fari- 

 bault August 30th. Young hoppers were found very late in the season. 

 On September 3r(l new!}- hatched nymphs were found on apple stock 

 on yearling as well as three and four year stock in a nursery at Fari- 

 bault, and they were found at a still later date (Sept. 19) at Albert 

 Lea. 



Figr. s. Alfalfa, on right, normar: on left ln.iiired by E. iikiIi. 



Field Observations in 1908: May 6th. Albert Lea: Xo young 

 hoppers on leaves of apple. 



A prominent nursery man made the following comment during 

 this visit at Albert Lea: The leaf hopper retards the growth of 

 nursery stock, and, if it were not for the hoppers, apple trees could 

 be marketed at three years instead of four. The trade requires a tree 

 between five and six feet high. 



May 28th : St. Anthony Park : Found in all stages upon apple. 



June 1st, Owatonna: Empoasca present in all stages in apple 

 orchard and on apple stock in nursery. But few adults. 



