THE GREEN JUNE BEETLE. 47 



receptacles containing a little water on which a film of kerosene is 

 floating. A boy passes along the plants and knocks the beetles into 

 the bucket. Sprays are impractical. 



Foe Grubs. 



From experiments which were conducted during two seasons in 

 tidewater Virginia against the larvae of the green June beetle, the 

 conclusion points to trapping as the best means of control in that 

 region and probably in most others. 



Trapping. 



Flowerpots and V-shaped troughs have proved the most success- 

 ful and inexpensive methods. Their simplicity and cheapness are 

 factors in their favor. They also serve as permanent traps until a 

 certain area is cleared of all grubs, and they can afterwards be 

 shifted from one field to another. Where a crop has already been 

 planted, the flowerpot method is the only one that can be safely used. 

 In other situations where a trough can be placed, this method is 

 the most advantageous and inexpensive. 



Kerosene Emulsion. 



Experiments with kerosene emulsion indicate that success can be 

 obtained when the grubs occur within 2 or 3 inches below the surface 

 and when they begin to crawl above ground. In large areas the appli- 

 cation is expensive but in more limited areas, as under sash, good 

 results may be obtained with the emulsion at a strength of 1 to 10, 

 using 3 gallons of liquid to a sash. The cost is approximately 2 or 3 

 cents a sash. There is no injury to foliage if carefully applied; 

 parsley, a delicate plant, has not been harmed in the least. 



Unless directions are carefully followed for the preparation and 

 application and necessary precautions taken, kerosene emulsion is 

 apt to fail. This, however, does not detract from the fact that 

 properly applied it can be used quite successfully. 



Other Remedies. 



Poisoned baits such as have been used successfully against cut- 

 worms and grasshoppers have not been given a thorough test but 

 are worthy of a trial. The same applies to lime and gas lime, because 

 they have proved valuable against the common white grubs. 



Collecting the grubs by mechanical measures is also of value, but, 

 everything considered, is not as good as trapping measures which 

 have been thoroughly tested. 



