121 



light on Erwinia carotovora and Its relationship with 

 insects. For descriptions of the organism and the disease 

 see Bergey's Manual (1939> 5"th ed. , pages ^+09-^10), Leach 

 (19^0), and Bacillus carotoYorus in Elliott (1930). 



Bonde, R. 1930a The cahhage maggot as a disseminating 

 agent of "bacterial rots in the Cruciferae. Phytopath. , 

 20, 128. 



Bonde, R. 1930h Some conditions determining potato-seed- 

 piece decay and "blackleg induced "by maggots. Phytopath. , 

 20, 128. 



Bonde, R. 1939 The role of insects in the dissemination 

 of potato hlackleg and seed-piece decay. J. Agr. Re- 

 search, 59, 889-917. 



Elliott, C. 1930 Manual of "bacterial plant pathogens, 

 3^9 PP' Williams and Wilkins Company, Baltimore. (See 

 pages 39-^5. ) 



Johnson, D. E. 1930 The relation of the ca"b"bage maggot 

 and other insects to the spread and development of soft 

 rot of Cruciferae. Phytopath., 20, 857-872. 



*Jones, L. R. 1901 Bacillus carotovorus n. sp. die 

 Ursache einer weichen Faulnis der Mohre. Centr. Bakt. , 

 1, 12-21, 61-68. 



Leach, J. G. 1925 The seed-corn maggot and potato "black- 

 leg. Science, 6l, 120. 



Leach, J. G-. 192^~ The relation of the seed-corn maggot 

 ( Phorbia fusciceps Zett. ) to the spread and development 

 of potato hlackleg in Minnesota. ■ Phytopath. , l6, lk$- 



176. 



Leach, J. G-. 1927 The relation of insects and weather 



to the development of heart rot of celery. Phytopath. , 



17, 663-667. 

 Leach, J. G-. 1930 The identity of the potato "blackleg 



pathogen. Phytopath. , 20, 7^3-751. 

 Leach, J. G. 19^+0 Insect transmission of plant diseases, 



165 pp. McGraw-Hill Book Company, New York. 



Erw i n i a lathyr 1 



(See Bacillus lathyr i . 



Erw i n I A TRACHE 1 ph 1 LA (Smith) Holland 



Insects concerned: The twelve -spotted cucumber "beetle, 

 Diahrotica duodecimpunctata , and the striped cucumber 

 "beetle, Diahrotica vittata. 



