Nov., 1912.] ANNUAL REPORTS. 17 



New Hampshire and the contribution in course of preparation is devoted to 

 a study of the organism, Sphaeropsis malorum, Berk, producing this disease. 

 Some strains of S. malorum differing in their pathogenicity have been isolated 

 and studied. Two of the strains are weakly pathogenic and are distinguished 

 from one another mainly in their pyenidial characters: in one the pyenidia 

 are simple, in the other two or more loculate. The pathogenic strain has 

 large oblong spoies, the weakly pathogenic strains, have, on the other hand, 

 small ovate spores. 



The studies on the blossom end rot of the tomato, a disease of considerable 

 economic importance, are also nearing completion and will be published in 

 all probability during the fiscal year, 1912-13. 



The experiments with Bordeaux mixtures, both freshly prepared and pro- 

 prietary, as well as several other fungicides which were begun in 1907 have 

 been brought momentarily to a close. The results obtained, which may be 

 briefly summarized as follows, will be presented at length in a forthcoming 

 bullet in. f 



Bordeaux mixture was the most efficient of the fungicides experimented 

 with, and they included the form of wetable sulphur advocated by Scott 

 for the control of peach diseases and several proprietary sulphides of lime. 

 As the injurious action of Bordeaux mixture on the foliage and fruit of the 

 apple has not yet been overcome this wash cannot be unqualifiedly recom- 

 mended when the production of fruit free from blemishes, i. e., spray injury, 

 is desired. The lime sulphides which have little or no injurious action have 

 been recommended in lieu of Bordeaux mixture but as their fungicidal value 

 is of rather a low order too much reliance should not be placed on them in 

 years favorable to the development and spread of parasitic fungi. It should 

 be noted, however, that while the proprietary lime sulphides are of equal, 

 if not superior quality to similar washes prepared on the farm, the same is 

 by no means true of Bordeaux mixture, the proprietary wash is a less efficient 

 fungicide than the mixture prepared when needed. 



REPORT OF THE DAIRY DEPARTMENT. 



FRED RASMTJSSEN. 



During the past two years the Dairy Department has not been officially 

 connected with the Experiment Station. 



The department has, however, taken care of considerable correspondence, 

 supervised the official testing of dairy cows and execution of dairy laws. 



Testing of Pure Bred Cow>. 



Requests have been received from several breeders of Guernsey, Jersey, 

 Hoist ein and Ayrshire cattle for the supervision of the Station in conducting 



tBrooks, C. Fungicides in the Apple Orchard. New Hampshire Agri. Expt. Sta. Bull., 161: 

 15 pp. 1912. 



