The Spraying of Orchards. 



117 



The effect of former applications upon the crop) o/'1894. — It has- 

 been the custom to leave an additional check tree each year since 

 work in the orchard began. There were three King trees left 

 unsprayed this year; one had never received treatment, another 

 had been pprayed in 1892 only, and the third in 1892 and again in 

 1893. The trees when sprayed had received liberal applications of 

 the Bordeaux mixture. 



Table IY. — Showing the Effects of Former Applications of 

 Fungicides on the Crop of 1894. 



The table does not offer much hope to the lazy man, for the scab 

 is nearly as abundant upon one plant as on another. There is some 

 difference in favor of the tree which was treated twice but it is not 

 great enough to encourage an apple grower to neglect the care of 

 his trees ; yet one circumstance miret be taken into consideration. 

 These trees are situated in an orchard which is only partially well 

 sprayed. There has not been a systematic effort to extenninate the 

 disease upon the trees, which might make a greater difference than 

 is shown by the table. 



The early use of the copper-sulphate solution is closely related to 

 this subject. It may be possible to free the trees from the scab 

 fungus before the buds break by destroying it so early in the season, 

 but the results obtained in the orchard this year do not encourage 

 the plan. The proximity of untreated trees probably exerted an 

 unfavorable influence. Yet what orchard, even if entirely so 

 treated, is so isolated that it may not be infected from another in 

 the neighborhood ? Until more work has been done, it seems advis- 

 able to spray the young fruit as suggested by Table II, on page 114. 



London purple as a fungicide — Since the establishment of the 

 fact that Paris green possesses considerable value as a fungicide, its 



