358 Report of the Mycologist of the 



Humphrey,* Lodemant and some other writers have suggested 

 spraying for cucumber downy mildew, but we believe that the 

 only record experiment is one made by Halstedt who reports that 

 cucumber plants sprayed with Bordeaux mixture held their 

 leaves longer than unsprayed plants. The results of that exper- 

 iment were somewhat complicated by the fact that the unsprayed 

 plants suffered severely from attacks of anthracnose§ as well as 

 downy mildew. Hence it seemed desirable to have more exper- 

 imental evidence of the efficiency of Bordeaux mixture as a pre- 

 ventive of cucumber downy mildew. 



Let us now return to our own experiment : The forty-two rows 

 of cucucmber plants were divided into five plats as shown in the 

 accompanying diagram. 



♦Humphrey, J. E. Tenth Ann. Rept. Mass. Agr. Exp. Sta., 1892, p. 227. 

 tLodeman, E. G. The Spraying of Plants, p. 315. 



JHalsted, B. D. Experiments with Cucumbers, Rept. of the Now Jersey Agricultural 

 College Experiment Station for 1895, p. 303. 

 % Colletotrichum lagenarium (Pass.) Hals. 



