517 



other plants, doing no particular damage, and enter hibernation 

 in the fall. 



Control. Where vineyards are regularly sprayed with arsen- 

 icals there will be but little trouble with the flea-beetles, as the 

 grubs are very easily destroyed on the foliage. In neglected 

 vineyards the beetles often become very abundant and may be 

 quite destructive in such localities. Where it is necessary to 

 combat the beetles to prevent injury to the buds, close watch 

 should be kept for them and the buds should be thoroughly 



FIG. 373. 



of the grapevine flea-beetle, natural si/e at a, and enlarged 

 at 6. (After Slingerland.) 



sprayed at once, using 8 pounds of arsenate of lead per barrel. 

 Usually this will need to be applied just as the buds are becoming- 

 well swollen, and must be applied promptly and thoroughly, 

 as the beetles work quickly and a day's delay may mean the 

 destruction of the buds. In a small vineyard or on a few vines 

 the beetles may be collected by hand in the early morning when 

 they are sluggish, or may be jarred to canvas-covered frames 

 kept saturated with kerosene placed beneath the vines. 



