169 
Experimental studies on head smut of corn and sorghum. (With 
Marjorie Swabey and Laura A. Kolk.) Torrey Bot. Club 
54: 295-310. 5 pl. April 1927. 
(a) By Dr. Faris and Collaborator: 
Anthracnose of the Boston fern. Mycologia 15: 89-95. March 
1923. 
Factors influencing infection of Hordeum sativum by Ustilago 
hordet. Amer. Journ. Bot. 11: 189-214. March 1924. 
Factors influencing the infection of wheat by Tulletia tritici and 
I. laevis. Mycologia 16: 259-282. Nov. 1924 
aca specialization of Ustilago hordei. Phytopathology 
: 537-557. Dec. 1924. 
Modes ‘ot infection of sorghums by loose kernel smut. (With 
George M. Reed.) Mycologia 17: 51-67. 3 pl. Mar— 
Die O25. 
Project 2. Diseases of Trees 
PROBLEM I. DISEASE RESISTANCE IN THE AMERICAN CHESTNUT 
Scope: 
To develop a strain of the American Chestnut (Castanea den- 
tata) which will resist the attacks of the chestnut blight fungus 
(Endothia parasitica). 
Status: 
This problem has been studied since 1918 in cooperation with 
the Office of Investigations in Forest Pathology, Bureau of Plant 
Industry, U. S. Dept. of Agriculture. A survey of the native 
chestnut in the New York region was made in 1918 with the pur- 
pose of locating resistant trees. Since the blight has probably 
been present in this region longer than in any other part of the 
country, it was believed that immune or partly resistant individ- 
uals could be most easily located here. Partly resistant trees were 
found at Inwood, Manhattan, at Hollis, L. I, and at Valley 
Stream, L. I. Several series of trial inoculations on these trees 
proved their suspected resistance to be a fact. Since that time all 
of the trees at Inwood and Hollis have died. Several good in- 
dividuals still remain at Valley Stream. 
