DEPARTMENT OF PLANT PATHOLOGY. 



Teaching Work. 



During- the last year, two University courses were offered in Plant 

 Pathology, the beginning, half-year course and the advanced full- 

 year course. There were about 35 students registered in the be- 

 ginning course and 6 in the advanced course. Because of the torn-up 

 condition of the laboratories and the necessity of conducting this 

 work while the workmen were remodeling the rooms, much of the 

 work was not very satisfactory. However, the increase in the number 

 of students was gratifying. The teaching work necessarily engaged 

 a considerable part of the writer's time as well as that of Mr. Red- 

 dick during the winter months. 



Investigation. 



The research work during the past year was continued along several 

 lines begun previously. 



The grape-disease investigation, in charge of Mr. Reddick, was con- 

 ducted in a manner very similar to that of last year. The laboratory 

 established the year before was changed from the Lansing to the 

 Cushman vineyards, near Romulus. The work was done, as last year, 

 in co-operation with Professor Wilson of the Department of Horti- 

 culture. Mr. Reddick was on the ground throughout the season from 

 early in June until the middle of October. He has prepared a brief 

 statement in regard to this work, as follows : 



" The black-rot of grape investigation was continued this year ac- 

 cording to the general plan laid down at the beginning of the work. 

 The field laboratory at Romulus, N. Y., was maintained during the 

 entire summer, but was moved to a vineyard which was practically 

 abandoned. This afforded better opportunity for a study of the dis- 

 ease-producing organism. In many sections of the vineyard the losses 

 were total. The very frequent heavy local rains which continued 

 until nearly the middle of August afforded abundant opportunity 

 for infection, and much valuable data regarding dissemination, in- 

 fection, etc., were obtained. Some problems left from last year still 

 remain unsolved. In co-operation with the Department of Horti- 



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