Ixxxiv Department of Plant Pathology 



pany, of Xew York Cixy. Experiments in the control of onion blight 

 gave only negative results. Experiments in the control of onion smut, 

 on the other hand, gave a remarkable increase in yield on certain of the 

 treated plats. Attempts to control lettuce diseases have as yet been 

 without success. 



Investigation of certain aster and carnation troubles was begun July i 

 by R. C. Faulwetter, on the Herman Frasch Fellowship. 



Forest-tree diseases. — As was the case last year, much attention has 

 been given to the study of the chestnut-bark disease. From obser\'ations 

 and studies thus far made on the nature, occurrence, and spread of the 

 disease, it seems impracticable to advise the emplo\Tnent of extensive 

 control measures for woodlands of the State. Attention is being directed 

 to utilization and to reforestation with more desirable species, as the 

 most satisfactor}- way of repairing the destruction due to this devastating 

 disease. 



A twig blight of chestnut oak has been investigated, and considerable 

 attention has been given to forest nurserj' troubles, including a study of 

 white pine blister rust, Scotch pine rust, and a disease of seedling spruces. 

 The work is being done in cooperation with the State Conservation 

 Commission by W. H. Rankin, Forest Pathologist for the Com- 

 mission and instructor in this Department. 



Diseases and inseet pests of fruits and fruit trees. — L. R. Hesler has 

 continued this investigation, which is done in cooperation with the Depart- 

 ment of Entomolog}-. The work is supported by the Byron Fruit Growers' 

 Association. The pathological work has been confined largely to studies of 

 SpJiaeropsis malorum — said to be the cause of the Xew York apple-tree 

 canker — and to other canker diseases. Surgical methods and the dress- 

 ing of woimds has received special attention. 



Investigation of diseases of fruits and fruit trees, with special reference 

 to the various fungicides used in the control of these diseases. — Extensive 

 field experiments with a number of fungicides were inaugurated, but, 

 unfonunately for the investigation, a dearth of apple diseases prevented 

 satisfactory- progress. Laborator}- tests after the method devised by 

 Doctor Wallace and reported in Bulletin 290 have progressed 

 satisfactorily. 



Gladiolus disease investigations. — The work carried forv\-ard last year 

 by H. M. Fitzpatrick is being brought to a close. Other features of the 

 investigation have been imdertaken by L. M. Massey, assistant in the 

 Department Extensive experiments near Berlin, Xew York, have been 

 instituted and special studies have been directed toward the control of 

 the hard-rot disease. 



