1899-] SPRAYING APPLE TREES. 191 



solutions of copper sulphate were in no way detrimental to the trees; but 

 in all three cases the effect was soon lost and the three had a similar 

 appearance when the applications were not followed by the Bordeaux 

 mixture. 



A lime wash was also applied to several trees at the same time, and 

 in each case consisted of a solution of 2 lb. quicklime to 1 gal. water, or 

 2 lb. quicklime to 1 and y 2 gallons of water. Checks were left in each 

 case, and an examination on May 8th showed the treated trees to be 

 practically free from apple scab: yet on May 31st, where these first ap- 

 plications were not followed by Bordeaux mixture the trees presented 

 practically the same appearance as the untreated ones, as regarded the 

 prevalency of the scab. 



The second set of applications, made May 5th and 6th, consisted 

 of Bordeaux mixture and Paris green, in the proportion given in the 

 formula on page 203, the solutions being combined and both applied at 

 once. These were sprayed on trees on which the former application 

 had been made and on trees not before treated, leaving checks in each 

 case. A photograph of trees so treated, that is, with but one applica- 

 tion of Bordeaux mixture before blossoms opened, is given in figure 5. 



The third application, consisting of the combined mixtures as in 

 the second application, was made May 10th and nth, after blossoms 

 had fallen, and in each case applying it to trees before treated and to 

 previously untreated trees. Another application of this kind was made 

 May 25th. 



The accompanying illustrations, which are actual photographs taken 

 of these trees and fruit, show better than any written proof the value of 

 the application of fungicides for the control of the apple scab, if not 

 so clearly for the other nuisance above referred to. 



Description of Cuts. 



Figure 1, p. 184, shows two rows of apple trees treated with the 

 second and third applications above referred to. 



Figure 2, page 184, is a good illustration of trees unsprayed in the 

 adjoining rows to Figure 1. Both photographs were taken September 19th. 



Figure 3, p. 184, shows average specimens collected by Mr. Clinton 

 June 14th. Mr. Clinton had no knowledge of what the numbers referred 

 to until after the collections were made. No. 1 shows apples from trees 

 treated with copper sulphate April 1st, Bordeaux mixture and Paris 

 green May 3d, 10th and 24th. No. 2, Bordeaux and Paris green May 

 3d and 10th. No. 3, Bordeaux and Paris green May 10th. No. 4, 

 copper sulphate April 1st. No. 5, unsprayed. These are actual repre- 

 sentatives of the best fruit secured by one entirely unbiased in the matter. 



Figure 4, p. 186, shows trees unsprayed. Photograph taken Septem- 

 ber 19th. 



