INSECTS AFFECTING GRAINS, GRASSES, FORAGE 111 



of hopperdozers, which may be utilized where the use of poisoned 

 bran would not be possible. The hopperdozer consists of a 

 shallow pan containing water with a surface of kerosene, crude 

 petroleum, or coal tar, which is sometimes used without water. 

 The pan is mounted on runners or wheels and if larger than about 

 3 feet square is usually provided with partitions to prevent 

 slopping. The back and sides are high and sometimes are made 

 of canvas. " A good cheap pan is made of ordinary sheet 

 iron, 8 feet long, 11 inches wide at the bottom, and turned 



FIG. 82. Carolina locust killed by fungous disease. (Photo by Weed.) 



up a foot high at the back and an inch high in front. A 

 runner at each end, extending some distance behind, and a 

 cord attached to each front corner, complete the pan at a cost 

 of about $1.50 (Fig. SO). We have known of from seven to 

 ten bushels of young locusts caught with one such pan in an 

 afternoon. It is easily pulled by two boys, and by running 

 several together in a row, one boy to each rope, and one to 

 each contiguous pair, the best work is performed with the 



