February, '14] HUNTER: KANSAS GRASSHOPPER CONTROL 



81 



Total numbers of hoppers attracted by vai'ious baits: 



Lemon, 203 Vinegar, 126 



Anise oil, 131 Plain mixture, 169 



Stale beer, 159 Plain syrup, 185 



Orange, 119 



111 this count the additional ingredients added to plain bran poison 

 mash made no appreciable difference in the attractiveness of the bait. 

 The potassium cyanide was tried in place of Paris green, but proved 

 to be a complete failure. The hoppers would not eat the bait contain- 

 ing KCn. 



Summary of Preceding Data 



Lemon. . . . 

 Anise Oil. . 

 Stale Beer. 

 Vinegar. . . 

 Orange. . . . 

 Plain bran . 

 Plain syrup 



Total number of Portions 

 of Bran Put Out 



Total Number of Hoppers 



Attracted 



148 



148 



148 



148 



93 



66 



66 



1,016 

 654 

 680 

 594 

 386 

 329 

 312 



Average Number of 



Hoppers for Each Pile 



of Bran 



6.8 



4.4 



4.59 



4.0 



4.1 



4.9 



4.8 



The lemon, therefore, seems to be about 26.5 per cent more effective 

 than any of the other ingredients tried. As the foregoing experiments 

 show, however, very good results can be obtained with the plain bran 

 Paris green mash alone. 



All the above experiments show that the grasshopper has a keen 

 sense of smell and is easily attracted to the bait put out for it. 



In one instance a little of the mixture (about a teaspoonful) contain- 

 ing the lemon in it, was placed in the middle of the road where no vege- 

 tation was present and the distance measured from which the hoppers 

 were attracted. Several minutes after the bait had been put out, the 

 hoppers were seen leaving the thistles and crawhng for their newly 

 prepared breakfast. Soon the congregation around the "table" num- 

 bered between sixty and seventy. A photograph (see plate 3, fig. 1) 

 was taken of the "boarders coming for breakfast" but many of them 

 were scared away while a number of the others turned ''right about 

 face." 



The distance between the bait and a large thistle from which twelve 

 to sixteen hoppers came was then measured and found to be fifty feet. 

 It seems remarkable that the sense of smell should be so keenly developed 

 in the grasshopper. 



