New York Agricultural Experiment Station. 393 



Series 1 consisted of three sprayings. The first spraying 

 was made May 1, when the buds were breaking; the second was 

 made May 17, just after blossoming, and the third was made 

 June 1. 



tSeiies 2, consisting also of three sprayings, was begun May 

 li, just after blossoming; the second spraying was made June 

 1, and the third, June 15. 



Series 3. It was proposed to make three sprayings in the third 

 series, one about June 15, the second about July 15 and the 

 third about August 15. The first sp'raying was made June 15, 

 using Bordeaux mixture and eau celeste according to the original 

 plan. The second was made July 16 with the Bordeaux mixture, 

 but on account of the injury which had followed the use of the 

 eau celeste soap mixture it was applied at this time to three 

 trees of the Bavay's Green Gage only. The proposed third 

 spraying was not given either with Bordeaux mixture or with, 

 the eau celeste soap mixture, on account of the generally healthy 

 condition of the foliage in mid-summer. 



FormulcB. — The eau celeste soap mixture which was used in these 

 experiments was made according to the formula followed by Mr. 

 Scoon in previous years. One i)ouud of copper sulphate was 

 dissolved in water and diluted to about forty gallons. A quart 

 of 26° ammonia was then added and a pound of whale-oil soap 

 dissolved in water. The whole mixture was then diluted to fifty 

 gallons. This formula calls for an excess of ammonia. 



The Bordeaux mixture was made by dissolving one pound of 

 copper sulphate in about eight gallons of wJiter. Fresh slaked 

 lime was then diluted with water and added in excess of the 

 amount called for by the potassium ferro-cyanide test. The 

 whole mixture w^as then diluted to eleven gallons. 



Results. — The leaf-spot disease was not so abundant in this 

 orchard in 1895 as it had been in some previous years, so that 

 with some of the varieties the effects of the treatment were not 

 so pronounced as they undoubtedly would have been had the 

 disease been more prevalent. The Italian Prunes suffered most, 

 and so the experiments with this variety are selected to show 



