75 



Bourne (1921) found that many larvae of La chno sterna 

 smithi were killed by an organism which resembled " Bacillus 

 pestis . " Just which species this may "be is difficult to 

 ascertain. It probably was not the true Pasteurella pestis , 

 the cause of plague. 



*Bourne, B. A. 1921 Report of the Assistant Director of 

 Agriculture on the entomological and mycological work 

 carried out during the season under review. Rept. Dept. 

 Agric, 1919-20, 322-323. 



Bacillus pieris agilis Paillot 



Insect concerned: The white cabbage butterfly , Pieris 

 brassicae . 



Paillot (1919) isolated Bacillus pieris fluorescens 

 from infected caterpillars of the white cabbage butterfly. 

 At the same time he isolated 8 other bacteria from the 

 same source. He considered these organisms as secondary 

 invaders in causing the death of the larvae, the parasite 

 Apanteles glomeratus being the predisposing factor to 

 bacterial infection. The other bacteria isolated were, 

 Bacillus pieris liquefaciens alpha and beta, Bacillus non- 

 liquefaciens alpha and beta, Bacillus pieris agilis , 

 Diplococcus pieris , Diplobacillus pieris , and Bacillus 

 proteidis . 



*Paillot, A. 1919 Coccobacilles parasites des chenilles 

 de Pieris brassicae . Compt. rend. acad. sci. , 168 , 

 ^76-^78. 



Bacillus pieris liquefaciens alpha Paillot 



Insect concerned: The white ^cabbage butterfly, Pieris 

 brassicae . 



Paillot (1919) isolated Bacillus pieris liquefaciens 

 alpha and beta from diseased white cabbage butterfly 

 larvae. (See Bacillus pieris fluorescens . ) 



*Paillot, A. 1919 Coccobacilles parasites des chenilles 

 de Pieris brassicae . Compt. rend. acad. sci., l68 , 

 I176-478. 



