302 Report of the Entomologists of the 



to make a second application against the larva? when they first 

 appear on the leaves. In -this case nse the Paris green at the 

 usual strength, 1 pound to 150 gallons. If Bordeaux mixture is 

 to be applied the Paris green or other arsenical may be mixed 

 Math it in the same proportion as with water. 



In combating this insect it should be remembered that prompt 

 and thorough work is absolutely necessary to ensure success. The 

 spray should be fine enough and so directed as to cover as many 

 of the buds as possible and when applied to the leaves both upper 

 and under surfaces should be wet. 



IMPORTANCE OF UNITED EFFORT. 



The grape vine flea beetle is one of the species which migrates 

 readily from one field to another. A neglected vineyard may 

 serve as a breeding place for large numbers of the beetles which 

 will in time infest other vineyards in the vicinity. This was well 

 illustrated last season in several Keuka Lake vineyards which 

 came under the writer's observation. Some of the vineyardists 

 who were in the habit of carefully spraying their vines had much 

 of their good work undone by the large numbers of beetles which 

 came from neglected vineyards nearby where food had become 

 scarce. From this it is evident that if this insect is to be checked 

 in communities where they have become abundant, every vine- 

 yard should be carefully watched and the vines promptly sprayed 

 when the invaders appear. 



