Eighth Report of the state Entomologist 207 



zation, will of courae, assist materially in the ability of tin- plants to 

 re3ist the attack nude up on th.9tnby this pernicio as insect. ( Country 

 Gentleman, for January 8, L891.) 



The Hop-vine Aphis and Rkmkpiks. 



At the request of the editor of the New England Homestead for an 

 article upon the best methods known lor controlling the hop-vine aphis, 

 the following- notice was communicated, and was published in the issue 

 for May 2, 1801. It was copied in a number of other papers in the 

 hop districts of the State: 



The one great uncertainty in the successful cultivation of the hop 

 crop is its liability to attack and destruction by the hop-vine aphis — 

 sometimes known as "the fly" or "the green fly." Although this 

 insect is not entirely absent from our hop yards in any year, yet its 

 multiplication and the excessive injury that it frequently inflicts is 

 dependent upon atmospheric and meteorological conditions. Unfor- 

 tunately these can not be predicted, and, therefore, the hop-grower 

 usually defers action that would serve to prevent aphis multiplication 

 until the attack has been made in force — can not be wholly arrested, 

 and can only be mitigated at a great expense. 



Hop-vine Aphis in Europe and America. 



The hop-vine aphis, Phorodon humidi (Schrank), is an European 

 pest, which was first observed in the United States in 1862. For a 

 long time it has been allowed to work its ravages in this country, in 

 years of its abundance, without effort made against it. Quite different 

 has been the course pursued in England, where no hop-grower attempts 

 to grow a crop without his regular " hop- washings.'' 



Its Life-history Discovered. 



Four years ago (in 1887), the life-history of the insect was, for 

 the first time, worked out, in the hop yards of New York, by the ento- 

 mological division of the IT. S. Department of Agriculture. With this 

 knowledge at our command, it is safe to say that, with proper care 

 and without great expense, our hop crops can be saved from aphis 

 destruction. 



