26 



the surface, or on a sheet soaked with the oil ; this should be done when 

 they are somewhat torpid in the early morning. During- the warmer 

 hours of the day they are too lively to be caught in this manner. Later 

 on in the season, should the grubs be seen on the foliage the spraying 



Fig. 39. — Grape-vine flea-beetle. 



should be repeated. In the autumn all fallen leaves and rubbish about 

 the vines should be cleaned up and burnt so as to leave no convenient 

 winter quarters for the beetle. As this insect is equally prevalent on the 

 Virginia-creeper, the same treatment should be applied to it if there are 

 any of these favorite plants near by. 



