Grasshopper Control 
19 
Fig. 0.—Grasshoppers killed by Empusa grylli Fres clinging to oat heads, 
Trinidad, 1916. (Original). 
sweet clover, or other plants, where their dead bodies remain for 
days and weeks. (See Figs. 5 and 6.) 
Professor Sacket*, bacteriologist of this Station, makes the 
following statement relative to Empusa grylli Fres.: 
“Experiments carried on in co-operation with the Division of Ento¬ 
mology have demonstrated that the gresshopper is not susceptible to the 
organism when brought in contact with the ordinary form of the fungus, 
such as is obtained from the bodies of dead grasshoppers. In these ex¬ 
periments to which I refer, the grasshoppers were literally fed with the 
fungus, and the pure culture was spread upon their bodies. More than 
this, grasshoppers free from the disease were placed in breeding-cages 
with sick grasshoppers and grasshoppers dead of the disease, but, in 
spite of these numerous attempts to infect them, all remained healthy.” 
♦Twenty-fourth Annual Report, Colorado Agricultural Experiment Sta¬ 
tion, p. 20. 
