308 EXPERIMENT STATION RECORD. 



Tlie treatiiHiit with wheat began May 13 and with oats about a week 

 hiter. Five apiiHcations of Bordeaux mixture were made to wlieat, the 

 last June 10; :iiid on June 12 rust was noticed on the sprayed wheat- 

 One other application Avas given after this. Six applications of Bor- 

 deaux mixture were made on the oats, beginning when the plants were 

 2 or 3 in. tall. Applications of anmioiiiacal copper carbonate were 

 made at the same dates, and tliese did not injure the leaves in any 

 respect. The application of the fungicides was discontinued owing to 

 tlie prevalence of the rust, there being no appreciable difference 

 between sprayed and checked plants. 



The author concludes that other means than spraying with fungicides 

 must be found for the prevention of rust, and experiments are being- 

 conducted along other lines. 



A ihird season''s e.rpcrintcnt in treatiuf/ spot disease of currants (pj). 

 987, 988). — The author has i)reviously reported on the value of Bordeaux 

 mixture for the prevention of spot disease of currants (E. S. K., 4, p. 109), 

 and last year experiments were conducted with ammoniacal carbo- 

 nate of copper to which molasses was added. Seven applications were 

 made to both white and black currants, the treatment varying some- 

 what, due to the condition of the weather. The currants retained then- 

 leaves until the end of the season, showing but few affected leaves, and 

 in the spring the treated plants looked nuich better than the checks 

 These and the previous experiments with Bordeaux mixture show the 

 l^racticability of their use in the prevention of currant leaf diseases. 



Experiments intrentnujoHts irith different eJiernicals and hot water (pp. 

 988-9!IO). — Ivxperiments were conducted by the author, assisted by F. 

 C. Stewart, in treating oats before ijlanting with ammoniacal copper 

 carbonate, corrosive sublimate, iron sulphate, Bordeaux mixture, and 

 hot water. Separate lots of seed were treat'Cd for 2 hours, and others 

 for 24 hours, with all the fungicides except Bordeaux mixture. Oats 

 were soaked in the Bordeaux mixture for 2 hours only. The hot-water 

 treatment was continued for 12 minutes at a temperature of 52 to 



540 C. 



The seed was planted April 18, and tabular information is given show- 

 ing relative height of the plants May 5 and July 11. The treatment 

 shows that hot water, iron sulphate, and Bordeaux mixture hastened 

 germii.ation, the first 2 about equally. The greatest number of seeds 

 germinating were those treated with Bordeaux mixture, which exceeded 

 the check. In regard to height of plants on May 5, the iron sulphate 

 ranks first, followed by Bordeaux nnxture. As far as total growth is 

 concerned, the hot water ranks first, followed by Bordeaux mixture and 

 iron sulphate, the check being poorer than the Bordeaux mixture. In 

 the caseof amnu)niacal copper carbonate and corrosive sublimate, when 

 the seed was soaked for 24 hours, the plants were thinner and made a 

 larger growth when once started. 



The author concludes that Bordeaux mixture and iron sulphate are 



