THE GREEN JUNE BEETLE. 39 



thev are crawling over sidewalks and on unused ground. At such 

 times they should be picked up and thrown into bags, barrels, or 

 large baskets and promptly burned. Not infrequently they have 

 been swept up from pavements and have received similar treatment. 

 The same result may be obtained by flooding, which causes the grubs 

 to appear at their exit holes in a few minutes. 



Wherever it is possible to flood fields, such as lawns, celery beds, 

 and similar areas, most affected by the grubs of this species, it 

 should prove effective; in fact, one of our correspondents has re- 

 ported that it is the only successful remedy that he has found on 

 golf greens, and it should answer equally well for lawns. 



Mr. Theodore Strohhaecher, of the Louisville Country Club 

 grounds, stated to Mr. Davis that he had picked up as many as 3 

 quarts of grubs from a single putting green after flooding with water. 



Collecting the beetles has been practiced to a considerable extent, 

 and while this method may not be entirely effective, it is a means 

 which should be adopted wherever practicable. Various methods 

 have been adopted in different places. The Louisville Country Club 

 pays the caddies for collecting the beetles, the work being done in the 

 morning. At Hot Springs, Va., the golf club pays the boys so much 

 a quart. Here they also used a trap which Mr. W. T. Bingham 

 described April 30, 1914, as follows : " Wire netting was stretched 

 on a frame 10 feet long and width of the roll (about 3 feet). This 

 frame was set in a trough partly filled with water with a little float- 

 ing kerosene. The beetles strike the netting and fall into the 

 trough and the kerosene finishes them." 



The time of collecting is of the greatest importance because of the 

 habits of the females. They appear at daybreak and settle in the 

 grass shortly after sunrise ; hence, in order to destroy them, collecting 

 must begin early in the morning. Also, collecting should start as 

 soon as the beetles make their appearance in July, before they lay 

 eggs, and should be continued throughout the month. 



On an area of about half an acre at Portsmouth, Va., large num- 

 bers of grubs were picked by hand by following the plow (PL VIII, 

 A). Some time later an application of kainit was made at the rate 

 of 1,000 pounds to the acre. Less injury by the grub on this particu- 

 lar area was noted by the farmer. Undoubtedly the hand-picking 

 had much to do with this success, but benefit from the kainit, while 

 possible later on, has no direct noticeable benefit in destroying the 

 grubs. 



Carbon Disulphid. 



Carbon disulphid has been used for many years with varying degrees 

 of success for different forms of white grubs and other subterranean 

 insects. Its cost, however, is somewhat prohibitive, and while it 



