Ixxxii Department of Plant Pathology 



appointment, admission to tliis course. The Department is powerless to 

 relieve the situation until additional floor space is available. 



INVESTIGATION 



Satisfactory progress has been made in the various lines of experiment 

 and investigation. Some work has been brought to a conclusion and new 

 lines of work have been inaugurated. As in former years, the investiga- 

 tions have in many cases been accompanied by field experiments con- 

 ducted from field laboratories, of which seventeen, located in thirteen 

 dift"erent counties, have been maintained the past sunnner. Much of the 

 experimental work has been made possible by financial cooperation with 

 growers and commercial houses in the form of temporary industrial 

 fellowships, seven of which have been in operation the past year. The 

 various lines of work are mentioned in the order in which they have 

 been begun in the Department. 



Grape disease investigations. — An investigation of the dead-arm dis- 

 ease, which in 1909 .and 1910 was conducted in cooperation with the New 

 York Agricultural Experiment Station at its vineyard in Chautauqua 

 county, has been continued. A second report is in preparation. 



Field work on black-rot has been continued as in former years. The 

 experimental plats were located at Bluff Point in the Keuka Lake district, 

 but as the disease did not appear in our plats the experiments were of no 

 value. The work has been performed by C. T. Gregory, instructor in 

 the Department. The investigations of the downy mildew fungus have 

 been continued and a number of interesting points established, chief among 

 which, from the practical standpoint, is confirmation of the recently 

 announced discovery that infection occurs exclusively through the stomata 

 on the underside of the leaf. What effect this discovery may have on 

 spraying operations for the control of this disease remains to be seen. 



Bean disease investigkition. — Professor Barrus has continued his in- 

 vestigations on the anthracnose disease. The work has been largely a 

 continuation and extension of the work begun last year, on the suscepti- 

 bility of the various varieties of beans and closely related plants to various 

 strains of the anthracnose fungus. A technical article, " Variation of 

 Varieties of Beans in Their Susceptibility to Anthracnose," has been 

 published (Phytopathology 1 1190-195. pi. XIX. 191 1). and other articles 

 are in course of preparation. 



Nursery disease investigations. — A'. B. Stewart, with the aid of four 

 student assistants, has continued the nursery work as in former years, 

 extending it to two additional nurseries — Brown Brothers Nursery at 

 Rochester and the nursery of Jackson & Perkins at Lyons. Studies of 



