- 12 - 
in resistant varieties result of necrotic processes in host. 
In severe infection the whole diseased area dies and forms a 
dark brown layer over infected organ. Growing organs gradually 
shed this layer. Varieties in grades 1 and 2 are absolutely 
immune in field, those in 3 to 5 are partly immune and partly 
susceptible. 
(14) Kohler, E. 
1931 Der Kartoffelkrebs und sein Erreger (Synchytriym endo- 
bioticum (Schilb.) Perc.) Landw. Jahrb. 74: 729-SC6. 1931 
(Abstr. in R. A.M. 11: 321, 1932.) 
This is a complete study of disease and fungus, history, 
distribution, morphology, biology, hosts, specialization, 
technique, control, bibliography. 
(15) Kohler, E. 
1936 Untersuchungen uber Synchytrium endobioticum (Schluss- 
bericht) . (Studies on Synchytrium en dobiotic um (final re- 
port) Z. Pflkrankh., 44: 214-223, 1936.) (Abstr. in R.A.M. 
15: 524-5. Ag. 1936). 
Successfully inoculated Schizanthus pinnatus, Solanvm. 
dulcamara, tomato (Lucullus and Tuckswood varieties), S. 
nigrum vars. macro .c ar pum and chloroc argum, S. miniatum and 
vars. yiridicaule and rubric aul e, and S. racenuger uro . Symp- 
toms less marked than in susceptible potatoes. 
(16) Lepik, E. 
1935 On the Distribution of the Potato Wart Disease, Syn- 
chytrium endobioticum. Phytopathological Experiment of the 
University of Tartu in Estonia, Bui. No. 28, 1935. (See 
also Lepik abstract in R.A.M. 13: 799) 
Author gives a map showing distribution and sources of 
infected potatoes (indicated by arrows) but says errors were 
made in marking the direction of distribution in some cases. 
"The literary data, which the writer of this article is 
convinced are wrong, have been left out." This includes 
some of his own reports in a previous paper (R.A.M. 13: 
799) . He says there is a difference of opinion as to the 
source of infection in some cases, Holland disclaiming re- 
sponsibility for some distribution of wart attributed to 
her. He seems to think there is ground for argument but 
commends the Holland service. Claims wart is absent from 
Estonia, Latvia, Lithuania, and Russia. In Finland, With 
regard to conflicting reports as to Malta quotes Pethybridge, 
"With regard to the Island of Malta, : am not able to state 
with certainty whether Synchy trium end obioticu m is still 
present in that island, but we have official information 
that in the spring of 1914 a few cases of Wart Disease were 
observed at Lia and Musta in the variety, Up-to-Date, the 
seed of which had been imported from England. It was stated 
that the disease was stamped out immediately and, therefore. 
