that the use of a torch of some such type as shown on last page r 

 is the most feasible means of control to clear vegetation of all 

 kinds. The particular type of torch shown can be hooked from 

 branch to branch in a tree, thus enabling the operator to treat 

 tall trees after removing the shoulder straps. However, for 

 tall vegetation on a large scale, such as commercial orchards, 

 I pointed out, on pages 10 to 14 of my Circular No. 147, some 

 torch outfits with a tank mounted high on a wagon and hav- 

 ing 4 leads, which thus permits of having one of two men lick 

 the side of a row each ; the bugs, during the cool part of the 

 day will drop, to be killed by a licking at close range on the 

 ground by the two other men. As far as possible, of course, it 

 is better in the case of these bugs, to use some specially attrac- 

 tive trap crop, such as grain sown in rows at such time as to 

 head just then and attract the bugs. 



For control on alfalfa, Dr. Morrill suggests the construc- 

 tion of a hopperdozer on page 13. But the insects are either 

 liable to drop off or to fly off when disturbed by a machine. I 

 had pointed out in my Circular No. 140, p. 3, as a better way 

 that some high-wheeled cart could be fitted with a tank to feed 

 several burners to lick the field over. But I shall later show 

 that giving poultry, on a large scale, the run of the field, is far 

 the best all-around means of control on alfalfa. 



According to observations made by the Bureau at Bar- 

 stow, in West Texas, in 1905, the conchuelas were most plenti- 

 ful on Milomaize during the first week in August, as many as 

 25 of the insects frequently being noted on a single seedhead 

 (p. 5). Evidently a tank mounted on some light motor truck 



28 



