The Spraying of Orchards. 



113 



The number of aj)jpUcations necessary. — The King tree selected 

 ior this experiment showed considerable difference in the quality of 

 the fruit, as shown in the table. They were treated with the 

 Bordeaux mixture and as nearly as possible the same amount of 

 liquid was applied to each tree. 



Table I. — Showing the Value of Yarying Numbers of 



Applications 



Probably the most interesting feature of the table is the effects 

 produced by only two applications. These were made May 7th and 

 May 19th. The number of iirst-class apples was increased from 

 7 to 42 per cent, while the third-class fruit diminished from &Q to 

 4 per cent. The additional treatment given the other plants show 

 still greater benefits but not in the same proportion. The plot 

 treated four times i, shows considerably more first-class apples, and 

 the apples of the second class were also decidedly less attacked by 

 scab and were consequently more handsome. This lot also shows an 

 increase in the third quality, yet this can scarcely be attributed to 

 the spray which produced such favorable results in the plot treated 

 but twice. The apples from the trees which were sprayed five 

 times, all grades considered, were not much better than those receiv- 

 ing four treatments. This is practically the same result which was 

 obtained last year * with this variety. The comparatively slight 

 difference between the fruit treated twice and that treated four 

 times suggests the use of only three treatments, and if only this 

 number had been made, it would in all probability have been suf- 

 ficient. The other varieties treated in these plots did not yield suf- 

 iicient fruit for safe comparison. 



The two most important applications. — It has been shown in 

 former bulletins from this station, as well as in those from other 



* Cornell Agric. Exp. Sta., Bull. 60, p. 267. 

 8 



