16 THE CONTROL OF APPLE BITTER-KOT. 



which were carried out by Mr. J. W. Beach, of Batavia, Ark. Sul- 

 phuret of potassium was the fungicide used, and the results reported 

 were somewhat encouraging. In 1889 Gallowa}^ also directed a series 

 of experiments on the treatment of this disease in Virginia. Potas- 

 sium sulphid and ammoniacal copper carbonate were used, and Mr. 

 George G. Curtis,^ who did the spraying, reported good results from 

 both. 



The investigations thus begun were soon followed with remedial 

 experiments by several experiment stations workers, notably Alwood,^ 

 Garman,'' Stinson,'^ and Whitten,' all of whom reported favorable 

 though not entirely satisfactory results from spraying with copper 

 compounds. 



Since the severe outbreak of 1900, efforts to control this disease 

 have been continued with renewed interest, and several papers report- 

 ing results of remedial experiments have been published. In 1901 

 Quaintance,-^" in writing of experiments conducted in Georgia the pre- 

 ceding year, stated that '" the results are much in favor of four appli- 

 cations of Bordeaux, not only in quantity of fruit but in size and 

 appearance, and, as developed later, in keeping quality." Some of 

 the best results that have come to the writer's attention are those 

 reported by Stinson in 1901. '^ One plot sprayed five times gave "59 

 per cent of the fruit free from bitter-rot,'' another sprayed four times 

 gave "78 per cent of the fruit free from bitter-rot," while one check 

 plot had only "l.«>per cent of the fruit free from bitter-rot" and 

 another "14 per cent of the fruit free from bitter-rot." In 1902'' the 

 same writer published the results of another series of experiments 

 showing beneficial results from spraying. 



As a result of their investigation in 1902, Burrill and Blair' recom- 

 mended a systematic search for and removal of the diseased fruits and 

 infecting cankers or munmiies, stating that "the canker and infested 

 fruit should be removed, taking care not to distribute the infection in 



"Curtis, George G. Treatment of Bitter-Rot of the Apple. Bui. 11, Section of 

 Vegetable Pathology, U. S. Dept. of Agriculture, 1890, pp. 38-41. 



SAlwood, William B. Bitter-Rot. Bui. 17, Va. Agr. Exp. Sta., 1892, pp. 61-62 

 and 64-65. Also Ripe-Rot, or Bitter-Rot of Apple. Bui. 40, Va. Agr. E.\p. Sta., 

 1894, pp. 59-82. 



c Garman, H. Bui. 44, Ky. Agr. Exp. Sta., 1893, pp. 3-24. 



^Stinson, John T. Bitter-Rot. Bui. 26, Ark. Agr. Exp. Sta., 1894, pp. 33-34. 



("Whitten, J. C. The Bitter-Rut. Bui. 31, Mo. Agr. Exp. Sta., 1895, pp. 3-4 



and 7-15. 



./■ Quaintance, A. L. Bitter-Rot of Apples. Thirteenth Annual Report, Ga. Exp. 

 Sta., pp. 360-361 and PI. IX. 



f/ Stinson, John T. Preliminary Report on Bitter- Rot or Ripe- Rot of Apples. Bui. 

 1, Mo. State Fruit Exp. Sta., pp 3-21. 



/iStinson, John T. Notes on Spraying for Bitter-Rot. Bui. 2, M:o. State Fruit 

 Exp. Sta., pp. 3-20. 



«Bul. 77, 111. Agr. Exp. Sta., p. 366. 



