284 State Horticultural Society. 



ture was absolutely necessary, and that damp weather assisted in 

 the development of the disease. It seems that this was the universal 

 opinon of men who had been studying the disease quite closely. 

 However, this year the disease developed rapidly in some orchards 

 without raips, for in South Missouri there was a long period during 

 the summer and fall in which we had practically no rain fall, yet the 

 disease was spreading c|uite rapidly about September ist, in some 

 orchards, but we were fortunate enough to have a cold spell of weather 

 which permanently checked it. 



Usually this disease does not make its appearance until the ap- 

 ples are nearly grown, but the present season specimens of apples- 

 afifected with bitter rot were sent to the Experiment Station about the 

 middle of July ; however, the spread of the disease was not rapid at 

 this time, and but few of the apples were affected. 



The question that I am, to speak on is concerning experiments 

 that we have carried on to prevent, if possible, this disease. Last 

 year in the experiments carried on by the station it was found that 

 the disease could be prevented by the use of Bordeaux mixture, and a 

 record of the results of the work is given in Bulletin No. i, from the 

 Fruit Experiment Station, however, it might be well to mention them 

 again. 



On Plot No. I, sprayed five times with Bordeaux mixture during 

 the season, fifty-nine per cent, of the fruit was free from Bitter Rot, 

 while on the unsprayed plot adjoining only one and six-tenths per 

 cent, of the fruit was free from Bitter Rot. On another plot sprayed 

 four times during the season seventy-eight per cent, of the fruit was 

 free from Bitter Rot, while on the unsprayed plot but nineteen per 

 cent, of the fruit was free from the disease. This shows unquestionably 

 the advantage of spraying. Similar results have been obtained pre- 

 viously in other orchards. 



This year experiments were planned at the Experiment Station 

 practically on the same plan as those of last year, except that they were 

 somewhat more extensive, as tlie}^ were carried on in several orchards 

 in co-operation. We carried on co-operative spraying experiments 

 ac Dorchester in Mr. Henry Scholten's orchard, and at Mountain 

 Grove, and in co-operation with the United States Department of 

 Agriculture experiments were conducted in the orchard of Mr. S. U 

 Haseltine at Dorchester, and the Olden Fruit Company at Olden. 

 Mr. H. von Schrenk, who is connected with the United States De- 

 partment of Agriculture, co-operated in the work at Mr. Haseltine's 

 and Mr. F. W. Faurot, also of the United States Department _of Agri- 

 culture, in the work at Olden. 



