G76 STATE BOARD OF AGRICULTURE. 



The vai-iabilKy of the results was in all probability caused by making 

 the application upon so many varieties, as these varieties showed vary- 

 ing susceptibility to fungous troubles and some of the check trees pro- 

 duced as sound fruit as some which were sprayed. 



Spray injury to fruit, if occurring, was not noted. Peach Scab and 

 Bacteriosis occurred on the leaves to some extent on all of the plots. 

 The greatest amount was on the check trees, the Atomic sulphur trees 

 being next in tlie amount of 'diseased leaves while the self-boiled lime- 

 sulphur and hydrated lime-sulphur sprayed trees had only a small amount 

 of infection. l*each Scab Avas also quite prevalent, as well as Brown 

 Rot, on the check trees. 



Hydrated lime and sulphur apparently weathers as well as the self- 

 boiled lime-sulphur but it seems to be a coarser mixture which does not 

 spread quite as readily as the self-boiled. However, for one trial, 

 hydrated lime and sulx)hur gave good satisfaction and is worthy of 

 further trial. 



PLUM SrRAYING. 



The mixtures used were concentrated lime-sulphur, 1 gallon to 40; 

 Atomic sulphur, 5 pounds to 50 gallons; self-boiled lime-sulphur, 

 8-8-50 and Bordeaux mixture 4-4-50. To each of the above mixtures was 

 added dry arsenate of lead, li/4 pounds to 50 gallons of mixture for 

 all applications. 



These mixtures were applied on May 9th, 11th, 12th, 23d, June 12th 

 and 13th. This work was done upon mixed varieties and included only 

 one and sometimes two trees of a variety. Because of this fact, varjdng 

 susceptibility to disease was encountered according to the variety and 

 this factor has produced a considerable variation in the results. 



The foliage of the trees sprayed with self-boiled lime-sulphur had the 

 best appearance. In only one case was there any noticeable attack of 

 Shot Hole fungus and this was a spring infection on one Stark Gage 

 tree which did not develop to any extent. Atomic sulphur and com- 

 mercial lime-sulphur gave about the same degree of control, there being 

 only scattering leaves affected with the fungus. Two trees sprayed with 

 the Bordeaux mixture suffered nearly complete defoliation from the 

 disease and the fungus appeared to some extent upon most of the trees 

 sprayed with this mixture. 



Russeting of the fruit was quite general on the Gage trees but as 

 this also occurred on check trees, it was not possible to attribute it to 

 spray injury. Check trees seemed to develop leaf spot in accordance 

 with their susceptibility. The Japanese varieties had considerable injury 

 from this cause while some of the European varieties had only scatter- 

 ing leaves affected. 



Results showed quite a lack of uniformity. . With one exception, all 

 of the trees sprayed with the Atomic sulphur failed to set a crop of 

 fruit and this tree did not have enough to furnish any results. Likewise 

 with the check trees only one produced any fruit arid this one was fairly 

 free from insects and diseases and did not prove a very reliable check. 



