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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



the injury caused by it, and ever since that time it has occupied a 

 very important place in the literature of grape insects in this country. 

 Harris's account of the insect remained the standard for a long- 

 while, and no very thorough work was done on the life history of 

 the insect until it was undertaken by Slingerland in 1901. x 



In California it has been reported as a pest of the vine since 1875. 

 The accounts of insects in the "Pacific Rural Press" furnish a 

 fairly good index on the occurrence of injurious species in this 

 State, and the first account there given is in the issue of April 12, 

 1879. Notices regarding this insect have appeared frequently in 



Fig. 2. Young grape leaves in advanced stage of hopper injury. These leaves had 

 completely dried up and fallen to the ground in the early spring. Photographed 

 April 20, 1907. 



the press of the State, as well as other publications, since that time. 

 Brief notices of its occurrence have been printed in the State Horti- 

 cultural Commission reports, and a bulletin on the insect was issued 

 from this station in 1897. 2 



Destructiveness. With the exception of the phylloxera, the vine 

 hopper is undoubtedly the most destructive insect pest of the vine 

 in the State. It is more uniformly present than any other insect 



1 Slingerland, Cornell Exp. Sta. Bull. 215. 



2 Woodworth, Cal. Agr. Exp. Sta. Bull. 116. 



