2o8 Bulletin 157. 



in June in New York. Why ? Because it is these grubs that 

 develop into the beetles which emerge in July, go into hibernation 

 in the autumn, and come forth in the spring to devour the grape- 

 buds. Thus every one of these grubs that is killed in June 

 means one less beetle to nip 3^our crop of fruit in the bud the fol- 

 lowing spring. Hence it is exceedingly important to kill every 

 grub possible in June. Fortunately, the grubs are easily acces- 

 sible and readily succumb to the proper spray. We cannot too 

 strongly emphasize this point that grape-growers should make 

 every effort to kill the grubs of this pest in June. The grubs 

 can be fought much more easily and successfuU}^ than the beetle. 



Oftentimes it will be found necessary to spray only portions of 

 a few vines to kill most of the grubs. This can be readily done 

 with a knapsack sprayer. We believe that by thus spraying 

 their vines in June our New York grape-growers can reach this 

 pest in its most vulnerable place, and at the same time insure 

 their fruit buds from attack by the beetles in the spring. 



In brief then, the grape-vine flea-beetle can be easily controlled 

 by the thorough use of a poison spray on the bursting buds in 

 early spring, or the beetles ma}^ then be collected from the buds 

 in pans of kerosene or on sheets soaked in kerosene. Follow up 

 this treatment in the early part of June by spraying the vines 

 with Paris green to kill the grubs then feeding on the upper sur- 

 face of the leaves ; ever}^ grub killed then means one less beetle 

 to hibernate and attack the buds the next spring. Be sure and 

 kill the grubs in June. 



