378 



Kansas State Board of Agriculture. 



ner as to cover from four to five acres with the amount of bait made by 

 using the quantities of ingredients given in the above formula. Since 

 very little of the bran mash is eaten after it becomes dry, scattering it 

 broadcast in the morning, and very thinly, places it where the largest 

 number will find it in the shortest time. Sowing it in this manner also 

 makes it impossible for birds, barnyard fowls, or live stock to secure a 

 sufficient amount of the poison to kill them. 



Where the alfalfa has just been cut the poisoned bait may be sown 

 broadcast in strips about one rod apart over the area to be treated. In 

 case a second application is made, sow the strip opposite to those of the 

 first sowing. If the grasshoppers are moving into the alfalfa from the 

 surrounding fields, roadsides, or pastures, which they often do in the 

 case of new alfalfa, simply sow a strip of the bran mash along the edge 

 of the field into which they are moving. Inasmuch as the grasshoppers 

 may continue to come from the surrounding fields, it may be necessary to 

 make a second and even a third application of the bait at intervals of 

 from three to four days. 



Hopperdozer. Coal oil h? been used in many ways for the destruction 

 of grasshoppers, but is most commonly used in the hopperdozer, a device 



FIG. 325. Drawing showing the construction of a hopperdozer sixteen feet long. 

 (After Milliken, Kan. Exp. Sta.). 



wnich consists of a long, shallow, galvanized-iron pan, mounted on very 

 low runners. The hopperdozer is very effective where it can be drawn 

 over an infested area near the surface of the ground. It is a necessary 

 device wherever grasshoppers become destructive. On infested bare areas 

 or fields where it does not injure the crop, grasshopper damage can be 

 quickly checked by its use. It can be used without injury in an alfalfa 

 field for two or three weeks after a crop has been cut. A good kind of a 

 hopperdozer is made after the following plan: The pan is made from a 

 piece of galvanized sheet iron, 2,Vz feet wide and 16 feet long, by turning 

 up about 4 inches of the edge all around and soldering partitions across 

 it at intervals of about 2 feet. The sled is made of inch boards nailed on 

 2- by 4-in. runners, with a 3-foot screen made by fastening oilcloth, 

 smooth side forward, on upright pieces at the back. (Fig 325.) About 

 an inch of water is put in the compartments of the pan, and a sufficient 

 amount of oil added to make a good film over the top. Horses hitched at 

 either end draw the dozer over the infested ground, and grasshoppers 

 that attempt to jump back over it strike the screen and fall into the 

 water and oil. Many hop out again, but it is an advantage, as they die 

 and save the operator the trouble of later removing them. The dead 



