87 



Burroughs, A. L. 1941 Bacterial flora of the alimentary 



tract of Gryllohlatta campode i form! s campode 1 form! 3 



Walker. Montana State College Master's Thesis, 47 PP» 

 Duncan, J. T. 1926 On a "bactericidal principle present 



in the alimentary canal of insects and arachnids. 



Parasitol. , 18, 238-252. 

 Hatcher, E. 1939 The consortes of certain North Carolina 



hlattids. J. Elisha Mitchell Sci. Soc. , 5£, 329-33*4-. 

 Hindle, E. , and Duncan, J. T. 1925 The viahility of 



"bacteria in Argas persicus . Parasitol. , 17, 434-446. 

 Metalnikov, S. 1920 Compt, rend. sci. "biol. , 8j5, 119. 

 Steinhaus, E. A. 19^1 A study of the "bacteria associated 



with thirty species of insects. J. Bact. , k2, 757-790. 



BaC 1LLUS TENAX 



Insect concerned: The nun moth, Lymantria monacha . 



Eckstein (189*0 isolated this spore-forming "bacillus 

 from the larva of the nun moth. 



Eckstein, K. 189^ Untersuchungen iiber die in Raupen 

 Vorkommenden Bakterien. Z. f . Forst- und Jagdwe3en, 

 26, 3-20, 228-241, 285-298, 413-424. 



BAC I LLUS thur 1NG lENS I s Berliner 



Insects concerned: The meal moth; Ephestia kfihniella ; the 

 corn "borer, Pyrausta nubilalis ; the cahhage "butterfly, 

 Pieris hrasslcae ; Echnocerus cornutua ; Porchetria dispar ; 

 Vanessa urticae . 



In 1915, Berliner isolated Bacillus thuringiensis from 

 the larvae of the meal moth, Ephestia kflhnlella . Experi- 

 ments showed that the infection occurred through ingestion 

 and developed in the intestinal tract. Mattes (1927) 

 found that the larvae could "be easily infected "by mouth 

 with Bacillus thuringiensis , the spores multiplying in- 

 ternally and causing death. Sheperd (1924) states that 

 the organism has "been used for control of Echnocerus 

 cornutus . White (1927) reported he had encountered the 

 infection among Ephestia kuhnlella larvae in the Washing- 

 ton Laboratory. 



Bacillus thuringiensis ranks among the most pathogenic 

 of "bacteria to the corn "borer. Infection of corn "borers 

 through the mouth gives almost 100 per cent fatality. 

 Husz (1927) was the first to infect corn "borers. Under 



