

^Eckstein, K. 189^ Untersuchungen uber die in Raupen 

 vorkommenden Bakterien. Z. f . Forst- und Jagdwesen, 26, 

 3-20, 228-2^1, 285-298, \i3-h2k. 



BAC I LLUS SOLANACEARUM Smith 

 (See Phytomonas aoianacearum . ) 



Bac l llus SOTTQ Ischivata 



Insects concerned: The silkworm, Bombyx mori ; the corn 

 "borer, Pyrausta nubilalis . 



Bacillus sotto and Bacterium sotto are probably the 

 same organism. Paillot (1928) refers to it as the 

 " Bacillus sotto of Ischivata" while Metalnikov and Chorine 

 (1928) refer to it as "Ischivata's Bacterium sotto . " The 

 organism is a spore -former and rightly should he called 

 Bacillus . 



According to Aoki and Chigasaki (1915), Ischivata 

 stated that it was the cause of a severe epidemic of 

 flacherie in 1902 among silkworms of Japan and they also 

 found it to he pathogenic to the silkworm. However, 

 Paillot (1928) states that Bacillus sotto has been 

 "erroneously considered the cause of flacherie" by the 

 Japanese authors. 



Paillot (1928) carried out experiments using Bacillus 

 sotto against larvae of Pyrausta nubilalis . He found the 

 organism was not very effective against the insect, as 

 only three out of the ten corn borers infected showed 

 signs of disease at the end of three days, while the 

 others were still healthy. Metalnikov and Chorine (1928) 

 were not able to infect the corn borer by mouth with 

 Bacillus sotto 



Aoki, K. and Chigasaki, I. 1915 Uber das Toxin von sog. 



Sotto Bacillen. Mitteil der Med. Fakult. der Kaiser 



Univer. zu. Tokyo. Bd. 1^, heft 1, 1915. 

 Metalnikov, S. and Chorine, V. 1928 The infectious 



diseases of Pyrausta nubilalis Hb. Inter. Corn Borer 



Invest., Sci. Repts. , 1, lH-69. 

 Paillot, A. 1928 On the natural equilibrium of Pyrausta 



nubilalis Hb. Inter. Corn Borer Invest., Sci. Rpts., 



1, 77-106. 



