New York Agricultural Experiment Station. 361 



each of which one' or more brown hairs arise. By the middle of 

 May they have attained full size. 



Pupation. — When ready to pupate the larva; leave the vines 

 and enter the ground to a depth of 2 or 3 inches to trans- 

 form to the pupa state. The adults appear during the latter part 

 of June or early in July. 



The adults.— The adults feed all summer, finally seeking a 

 refuge in which to pass the winter and coming forth in the 

 spring in time to attack the buds as previously indicated. Proba- 

 bly some of the adults lay a few eggs during the summer for both 

 larvae and eggs were occasionally found last season as late as July 

 14. The larvae varied in size from newly hatched to nearly full 

 grown. 



methods of combating. 



Numerous remedial measures have been suggested and some of 

 them tried. They include scattering air slaked lime or unleached 

 ashes about the base of the vine to kill the larva? as they attempt 

 to enter the ground, spreading sheets of cloth saturated with 

 kerosene oil on the ground under the vines and jarring the beetles 

 upon them, and spraying the vines with kerosene emulsion or an 

 arsenical poison to kill the larvae. 



Spraying with an arsenical poison. — The prompt and thorough 

 application of an arsenical poison is probably the most effectual 

 and practical method of controlling this insect, especially in large 

 vineyards. Paris green is usually used. It is not improbable 

 that arsenite of lime would be equally effectual and cheaper. If 

 Paris green is to be applied, use 1 pound to 50 gallons of water 

 with the addition of enough freshly slaked lime to make the mix- 

 ture milky in appearance. Make the first application a short time 

 before the buds begin to swell or as soon as the beetles are found 

 on the vines. The object of this first application is to cover the 

 buds with poison so that the beetles which eat into them will be 

 poisoned by the Paris green. It will usually be found necessary 



