430 Forty- SIXTH Report on the State Museum. 



cultural Experiment Station. Its life-history has been worked out, and 

 the remedies available for its destruction are given. Of the various 

 remedies experimented with, the most efficient was found to be kero- 

 sene emulsion sprayed upon the insect while in its larval stage before 

 acquiring wings. A single spraying with the standard emulsion 

 reduced with twenty-five parts of water (less than three per cent of 

 kerosene) killed, as estimated, from 75 to 90 per cent of the larvae. 

 The early spring, just after the leaves had expanded, proved to be 

 the best time for sprajdng. In the experiments made, the unexpected 

 result was obtained that the fully exposed eggs of the Psylla were 

 not to be killed by spraying with undiluted kerosene, or even when 

 they were immersed in the liquid. 



Insects Injurious to the Blackherry. — In Bulletin N. of the New 

 Jersey Agricultural Experiment Station, November 30, 18i91, Dr. J B. 

 Smith, entomologist, has given popular descrij^tions, accompanied with 

 illustrations, of the more destructive blackberry insects, with sugges- 

 tions regarding the remedies to be used against them. 



Insects Injurious to Young Fruit Trees. — The entomologist of the 

 Oregon Agricultural Exj^eriment Station, in Bulletin No. 18, for March, 

 1892, has given popular accounts of, with suggestions as to remedies for, a 

 large number of the insect enemies of young fruit trees. 



The Grapevine leaf Hopper. — Mr. Townsend, the entomologist of 

 the New Mexico Agricultural Experiment Station in writing of 

 this insect Typhlocyha vitis (Harris), often referred to as " the 

 thrips," states: For some time after the hatching of the eggs, the 

 minute young are to be found mostly on the lower, older leaves. 

 Kerosene emulsion has been conclusivel}^ proven as the only practical 

 remedy for them. It should be diluted with fifteen times its volume 

 of cold water and applied as soon as the young hoppers appear^ 

 thoroughly reaching with the spray the underside of all the leaves, 

 especially the lower ones. If deferred until they have acquired wings, 

 it would be too late to attempt to destroy them in this manner. Vine- 

 yards sprayed only once the past season with the emulsion as above 

 directed, showed thereafter not enough hoppers to do any injury for 

 the remainder of the season, the same vines having been very plenti- 

 fully infested before the application. (Bulletin No. 5, March, 1892, 

 Ne\v Mexico Agr. Exp. Station.) 



It is strange, when this insect can be so easily destroyed, that there 

 should appear every year in the VineyarcUst and other papers, so many 

 complaints of severe injuries sustained from it. 



The Strawberry Weevil. — Mr. M. H. Beckwith, of the Delaware 

 Agricultural Experiment Station, in Bulletin No. 18, for September, 



